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C# FileStream.WriteLe方法代码示例

本文整理汇总了C#中System.IO.FileStream.WriteLe方法的典型用法代码示例。如果您正苦于以下问题:C# FileStream.WriteLe方法的具体用法?C# FileStream.WriteLe怎么用?C# FileStream.WriteLe使用的例子?那么恭喜您, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在System.IO.FileStream的用法示例。


在下文中一共展示了FileStream.WriteLe方法的15个代码示例,这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞,您的评价将有助于系统推荐出更棒的C#代码示例。

示例1: Write

        /// <summary>
        /// Writes the current content to the specified file.
        /// </summary>
        /// <param name="destFilename">The string fileName to write to</param>
        /// <param name="destFileLength">The only difference between the shp header and the
        ///  shx header is the file length parameter.</param>
        private void Write(string destFilename, int destFileLength)
        {
            string dir = Path.GetDirectoryName(Path.GetFullPath(Filename));
            if (dir != null)
                if (!Directory.Exists(dir))
                {
                    //if (MessageBox.Show("Directory " + dir + " does not exist.  Do you want to create it?",
                    // "Create Directory?", MessageBoxButtons.YesNo) != DialogResult.OK)
                    //    return;
                    Directory.CreateDirectory(dir);
                }
            //if (File.Exists(destFilename)) File.Delete(destFilename);

            FileStream fs = new FileStream(destFilename, FileMode.OpenOrCreate, FileAccess.Write, FileShare.None);

            fs.WriteBe(_fileCode);       //  Byte 0          File Code       9994        Integer     Big

            byte[] bt = new byte[20];
            fs.Write(bt, 0, 20);          //  Bytes 4 - 20 are unused

            fs.WriteBe(destFileLength);  //  Byte 24         File Length     File Length Integer     Big

            fs.WriteLe(_version);        //  Byte 28         Version         1000        Integer     Little

            fs.WriteLe((int)_shapeType);  //  Byte 32         Shape Type      Shape Type  Integer     Little

            fs.WriteLe(_xMin);            //  Byte 36         Bounding Box    Xmin        Double      Little

            fs.WriteLe(_yMin);            //  Byte 44         Bounding Box    Ymin        Double      Little

            fs.WriteLe(_xMax);           //  Byte 52         Bounding Box    Xmax        Double      Little

            fs.WriteLe(_yMax);           //  Byte 60         Bounding Box    Ymax        Double      Little

            fs.WriteLe(_zMin);         //  Byte 68         Bounding Box    Zmin        Double      Little

            fs.WriteLe(_zMax);          //  Byte 76         Bounding Box    Zmax        Double      Little

            fs.WriteLe(_mMin);         //  Byte 84         Bounding Box    Mmin        Double      Little

            fs.WriteLe(_mMax);        //  Byte 92         Bounding Box    Mmax        Double      Little

            // ------------ WRITE TO SHP FILE -------------------------

            fs.Close();
        }
开发者ID:ExRam,项目名称:DotSpatial-PCL,代码行数:52,代码来源:ShapefileHeader.cs

示例2: SaveAsIndexed

        private void SaveAsIndexed(string fileName)
        {
            FileStream shpStream = new FileStream(fileName, FileMode.Append, FileAccess.Write, FileShare.None, 10000000);
            FileStream shxStream = new FileStream(Header.ShxFilename, FileMode.Append, FileAccess.Write, FileShare.None, 10000000);
            int fid = 0;
            int offset = 50; // the shapefile header starts at 100 bytes, so the initial offset is 50 words
            int contentLength = 0;

            foreach (ShapeRange shape in ShapeIndices)
            {
                offset += contentLength; // adding the previous content length from each loop calculates the word offset

                contentLength = 22;
                contentLength += 2 * shape.Parts.Count;

                switch (shape.ShapeType)
                {
                    case ShapeType.PolyLine:
                        contentLength += shape.NumPoints * 8; // x, y
                        break;
                    case ShapeType.PolyLineM:
                        contentLength += 8; // mmin mmax
                        contentLength += shape.NumPoints * 12; // x, y, m
                        break;
                    case ShapeType.PolyLineZ:
                        contentLength += 16; // mmin, mmax, zmin, zmax
                        contentLength += shape.NumPoints * 16; // x, y, z, m
                        break;
                    case ShapeType.NullShape:
                        contentLength = 2;
                        break;
                }

                //                                              Index File
                //                                              ---------------------------------------------------------
                //                                              Position     Value               Type        Number      Byte Order
                //                                              ---------------------------------------------------------
                shxStream.WriteBe(offset);                     // Byte 0     Offset             Integer     1           Big
                shxStream.WriteBe(contentLength);              // Byte 4     Content Length     Integer     1           Big

                //                                              X Y Poly Lines
                //                                              ---------------------------------------------------------
                //                                              Position     Value               Type        Number      Byte Order
                //                                              ---------------------------------------------------------
                shpStream.WriteBe(fid + 1);                     // Byte 0       Record Number       Integer     1           Big
                shpStream.WriteBe(contentLength);               // Byte 4       Content Length      Integer     1           Big
                shpStream.WriteLe((int)shape.ShapeType);        // Byte 8       Shape Type 3        Integer     1           Little
                if (shape.ShapeType == ShapeType.NullShape)
                {
                    goto fin;
                }

                shpStream.WriteLe(shape.Extent.MinX);             // Byte 12      Xmin                Double      1           Little
                shpStream.WriteLe(shape.Extent.MinY);             // Byte 20      Ymin                Double      1           Little
                shpStream.WriteLe(shape.Extent.MaxX);             // Byte 28      Xmax                Double      1           Little
                shpStream.WriteLe(shape.Extent.MaxY);             // Byte 36      Ymax                Double      1           Little
                shpStream.WriteLe(shape.NumParts);                 // Byte 44      NumParts            Integer     1           Little
                shpStream.WriteLe(shape.NumPoints);                // Byte 48      NumPoints           Integer     1           Little
                // Byte 52      Parts               Integer     NumParts    Little
                foreach (PartRange part in shape.Parts)
                {
                    shpStream.WriteLe(part.PartOffset);
                }
                int start = shape.StartIndex;
                int count = shape.NumPoints;
                shpStream.WriteLe(Vertex, start * 2, count * 2);            // Byte X       Points              Point       NumPoints   Little

                if (Header.ShapeType == ShapeType.PolyLineZ)
                {
                    double[] shapeZ = new double[count];
                    Array.Copy(Z, start, shapeZ, 0, count);
                    shpStream.WriteLe(shapeZ.Min());
                    shpStream.WriteLe(shapeZ.Max());
                    shpStream.WriteLe(Z, start, count);
                }

                if (Header.ShapeType == ShapeType.PolyLineM || Header.ShapeType == ShapeType.PolyLineZ)
                {
                    if (M != null && M.Length >= start + count)
                    {
                        double[] shapeM = new double[count];
                        Array.Copy(M, start, shapeM, 0, count);
                        shpStream.WriteLe(shapeM.Min());
                        shpStream.WriteLe(shapeM.Max());
                        shpStream.WriteLe(M, start, count);
                    }
                }

            fin:

                fid++;
                offset += 4; // header bytes
            }

            shpStream.Close();
            shxStream.Close();

            offset += contentLength;
            //offset += 4;
            WriteFileLength(Filename, offset);
//.........这里部分代码省略.........
开发者ID:joelmuzz,项目名称:DotSpatial,代码行数:101,代码来源:LineShapefile.cs

示例3: AppendBasicGeometry

        /// <inheritdocs/>
        protected override void AppendBasicGeometry(ShapefileHeader header, IBasicGeometry feature, int numFeatures)
        {
            FileInfo fi = new FileInfo(Filename);
            int offset = Convert.ToInt32(fi.Length / 2);

            FileStream shpStream = new FileStream(Filename, FileMode.Append, FileAccess.Write, FileShare.None, 10000);
            FileStream shxStream = new FileStream(header.ShxFilename, FileMode.Append, FileAccess.Write, FileShare.None, 100);

            List<int> parts = new List<int>();

            List<Coordinate> points = new List<Coordinate>();
            int contentLength = 22;
            for (int iPart = 0; iPart < feature.NumGeometries; iPart++)
            {
                parts.Add(points.Count);
                IBasicLineString pg = feature.GetBasicGeometryN(iPart) as IBasicLineString;
                if (pg == null) continue;
                points.AddRange(pg.Coordinates);
            }
            contentLength += 2 * parts.Count;
            if (header.ShapeType == ShapeType.PolyLine)
            {
                contentLength += points.Count * 8;
            }
            if (header.ShapeType == ShapeType.PolyLineM)
            {
                contentLength += 8; // mmin mmax
                contentLength += points.Count * 12; // x, y, m
            }
            if (header.ShapeType == ShapeType.PolyLineZ)
            {
                contentLength += 16; // mmin, mmax, zmin, zmax
                contentLength += points.Count * 16; // x, y, m, z
            }

            //                                              Index File
            //                                              ---------------------------------------------------------
            //                                              Position     Value               Type        Number      Byte Order
            //                                              ---------------------------------------------------------
            shxStream.WriteBe(offset);                      // Byte 0     Offset             Integer     1           Big
            shxStream.WriteBe(contentLength);               // Byte 4    Content Length      Integer     1           Big
            shxStream.Flush();
            shxStream.Close();
            //                                              X Y Poly Lines
            //                                              ---------------------------------------------------------
            //                                              Position     Value               Type        Number      Byte Order
            //                                              ---------------------------------------------------------
            shpStream.WriteBe(numFeatures);                 // Byte 0       Record Number       Integer     1           Big
            shpStream.WriteBe(contentLength);               // Byte 4       Content Length      Integer     1           Big
            shpStream.WriteLe((int)header.ShapeType);       // Byte 8       Shape Type 3        Integer     1           Little
            if (header.ShapeType == ShapeType.NullShape)
            {
                return;
            }

            shpStream.WriteLe(feature.Envelope.Minimum.X);             // Byte 12      Xmin                Double      1           Little
            shpStream.WriteLe(feature.Envelope.Minimum.Y);             // Byte 20      Ymin                Double      1           Little
            shpStream.WriteLe(feature.Envelope.Maximum.X);             // Byte 28      Xmax                Double      1           Little
            shpStream.WriteLe(feature.Envelope.Maximum.Y);             // Byte 36      Ymax                Double      1           Little
            shpStream.WriteLe(parts.Count);                            // Byte 44      NumParts            Integer     1           Little
            shpStream.WriteLe(points.Count);                           // Byte 48      NumPoints           Integer     1           Little
            // Byte 52      Parts               Integer     NumParts    Little
            foreach (int iPart in parts)
            {
                shpStream.WriteLe(iPart);
            }
            double[] xyVals = new double[points.Count * 2];

            int i = 0;
            foreach (Coordinate coord in points)
            {
                xyVals[i * 2] = coord.X;
                xyVals[i * 2 + 1] = coord.Y;
                i++;
            }
            shpStream.WriteLe(xyVals, 0, 2 * points.Count);

            if (header.ShapeType == ShapeType.PolyLineZ)
            {
                shpStream.WriteLe(feature.Envelope.Minimum.Z);
                shpStream.WriteLe(feature.Envelope.Maximum.Z);
                double[] zVals = new double[points.Count];
                for (int ipoint = 0; ipoint < points.Count; ipoint++)
                {
                    zVals[ipoint] = points[ipoint].Z;
                }
                shpStream.WriteLe(zVals, 0, points.Count);
            }

            if (header.ShapeType == ShapeType.PolyLineM || header.ShapeType == ShapeType.PolyLineZ)
            {
                if (feature.Envelope == null)
                {
                    shpStream.WriteLe(0.0);
                    shpStream.WriteLe(0.0);
                }
                else
                {
                    shpStream.WriteLe(feature.Envelope.Minimum.M);
//.........这里部分代码省略.........
开发者ID:ExRam,项目名称:DotSpatial-PCL,代码行数:101,代码来源:LineShapefileFeatureSource.cs

示例4: SaveAs

        /// <summary>
        /// Saves the shapefile to a different fileName, but still as a shapefile.  This method does not support saving to
        /// any other file format.
        /// </summary>
        /// <param name="fileName">The string fileName to save as</param>
        /// <param name="overwrite">A boolean that is true if the file should be overwritten</param>
        public override void SaveAs(string fileName, bool overwrite)
        {
            Filename = fileName;
            string dir = Path.GetDirectoryName(Path.GetFullPath(fileName));
            if (dir != null && !Directory.Exists(dir))
            {
                Directory.CreateDirectory(dir);
            }
            if (File.Exists(fileName))
            {
                if (fileName != Filename && overwrite == false) throw new IOException("File exists.");
                File.Delete(fileName);
                string shx = Path.ChangeExtension(fileName, ".shx");
                if (File.Exists(shx)) File.Delete(shx);
            }

            // comment out by keen edge as per this discussion
            // http://dotspatial.codeplex.com/Thread/View.aspx?ThreadId=234754
            // InvalidateEnvelope();

            // wordSize is the length of the byte representation in 16 bit words of a single shape, including header.
            int wordSize = 14; // 3 int(2) and 2 double(4)
            if (CoordinateType == CoordinateType.Regular)
            {
                Header.ShapeType = ShapeType.Point;
            }
            if (CoordinateType == CoordinateType.M)
            {
                Header.ShapeType = ShapeType.PointM;
                wordSize = 18; // 3 int(2), 3 double(4)
            }
            if (CoordinateType == CoordinateType.Z)
            {
                Header.ShapeType = ShapeType.PointZ;
                wordSize = 22; // 3 int(2), 4 double (4)
            }
            // Set Header.ShapeType before setting extent.
            Header.SetExtent(MyExtent);

            if (IndexMode)
            {
                Header.ShxLength = ShapeIndices.Count * 4 + 50;
                Header.FileLength = ShapeIndices.Count * wordSize + 50;
            }
            else
            {
                Header.ShxLength = Features.Count * 4 + 50;
                Header.FileLength = Features.Count * wordSize + 50;
            }

            Header.SaveAs(fileName);
            Stream shpStream = new FileStream(fileName, FileMode.Append, FileAccess.Write, FileShare.None, 1000000);
            Stream shxStream =
                new FileStream(Header.ShxFilename, FileMode.Append, FileAccess.Write, FileShare.None, 1000000);

            // Special slightly faster writing for index mode
            if (IndexMode)
            {
                for (int shp = 0; shp < ShapeIndices.Count; shp++)
                {
                    shpStream.WriteBe(shp + 1);
                    shpStream.WriteBe(wordSize - 4); // shape word size without 4 shapeHeader words.
                    shxStream.WriteBe(50 + shp * wordSize);
                    shxStream.WriteBe(wordSize - 4);
                    shpStream.WriteLe((int)Header.ShapeType);
                    shpStream.WriteLe(Vertex[shp * 2]);
                    shpStream.WriteLe(Vertex[shp * 2 + 1]);
                    if (Z != null) shpStream.WriteLe(Z[shp]);
                    if (M != null) shpStream.WriteLe(M[shp]);
                }
            }
            else
            {
                int fid = 0;
                foreach (IFeature f in Features)
                {
                    Coordinate c = f.BasicGeometry.Coordinates[0];
                    shpStream.WriteBe(fid + 1);
                    shpStream.WriteBe(wordSize - 4);
                    shxStream.WriteBe(50 + fid * wordSize);
                    shxStream.WriteBe(wordSize - 4);
                    shpStream.WriteLe((int)Header.ShapeType);
                    if (Header.ShapeType == ShapeType.NullShape)
                    {
                        continue;
                    }
                    shpStream.WriteLe(c.X);
                    shpStream.WriteLe(c.Y);
                    if (Header.ShapeType == ShapeType.PointZ)
                    {
                        shpStream.WriteLe(c.Z);
                    }
                    if (Header.ShapeType == ShapeType.PointM || Header.ShapeType == ShapeType.PointZ)
                    {
//.........这里部分代码省略.........
开发者ID:DIVEROVIEDO,项目名称:DotSpatial,代码行数:101,代码来源:PointShapefile.cs

示例5: SaveAsIndexed

        /// <summary>
        /// Saves the file to a new location
        /// </summary>
        /// <param name="fileName">The fileName to save</param>
        /// <param name="overwrite">Boolean that specifies whether or not to overwrite the existing file</param>
        private void SaveAsIndexed(string fileName, bool overwrite)
        {
            string dir = Path.GetDirectoryName(fileName);
            if (dir != null && !Directory.Exists(dir))
            {
                Directory.CreateDirectory(dir);
            }
            if (File.Exists(fileName))
            {
                if (fileName != Filename && overwrite == false) throw new IOException("File exists.");
                File.Delete(fileName);
                string shx = Path.ChangeExtension(fileName, ".shx");
                if (File.Exists(shx)) File.Delete(shx);
            }
            if (CoordinateType == CoordinateType.Regular)
            {
                Header.ShapeType = ShapeType.MultiPoint;
            }
            if (CoordinateType == CoordinateType.M)
            {
                Header.ShapeType = ShapeType.MultiPointM;
            }
            if (CoordinateType == CoordinateType.Z)
            {
                Header.ShapeType = ShapeType.MultiPointZ;
            }
            Header.SetExtent(MyExtent);

            Header.ShxLength = ShapeIndices.Count * 4 + 50;
            Header.SaveAs(fileName);

            FileStream shpStream =
                new FileStream(fileName, FileMode.Append, FileAccess.Write, FileShare.None, 10000000);
            FileStream shxStream =
                new FileStream(Header.ShxFilename, FileMode.Append, FileAccess.Write, FileShare.None, 10000000);
            int fid = 0;
            int offset = 50; // the shapefile header starts at 100 bytes, so the initial offset is 50 words
            int contentLength = 0;

            foreach (ShapeRange shape in ShapeIndices)
            {
                offset += contentLength; // adding the previous content length from each loop calculates the word offset

                contentLength = 20;

                if (Header.ShapeType == ShapeType.MultiPoint)
                {
                    contentLength += shape.NumPoints * 8;
                }
                if (Header.ShapeType == ShapeType.MultiPointM)
                {
                    contentLength += 8; // mmin, mmax
                    contentLength += shape.NumPoints * 12;
                }
                if (Header.ShapeType == ShapeType.MultiPointZ)
                {
                    contentLength += 16; // mmin, mmax, zmin, zmax
                    contentLength += shape.NumPoints * 16;
                }

                //                                         Index File
                //                                         ---------------------------------------------------------
                //                                        Position     Value   Type     Number  Byte Order
                //                                        ---------------------------------------------------------
                shxStream.WriteBe(offset);                 // Byte 0  Offset   Integer    1     Big
                shxStream.WriteBe(contentLength);          // Byte 4  Length   Integer    1     Big

                //                                         X Y Poly Lines
                //                                         ---------------------------------------------------------
                //                                          Position  Value    Type      Number  Byte Order
                //                                        ---------------------------------------------------------
                shpStream.WriteBe(fid + 1);                // Byte 0  Record   Integer     1     Big
                shpStream.WriteBe(contentLength);          // Byte 4  Length   Integer     1     Big
                shpStream.WriteLe((int)Header.ShapeType);  // Byte 8  Type 3   Integer     1     Little
                if (Header.ShapeType == ShapeType.NullShape)
                {
                    continue;
                }
                shpStream.WriteLe(shape.Extent.MinX);     // Byte 12  Xmin     Double      1     Little
                shpStream.WriteLe(shape.Extent.MinY);     // Byte 20  Ymin     Double      1     Little
                shpStream.WriteLe(shape.Extent.MaxX);     // Byte 28  Xmax     Double      1     Little
                shpStream.WriteLe(shape.Extent.MaxY);     // Byte 36  Ymax     Double      1     Little
                shpStream.WriteLe(shape.NumPoints);       // Byte 44  #Points  Integer     1     Little

                int start = shape.StartIndex;
                int count = shape.NumPoints;
                shpStream.WriteLe(Vertex, start * 2, count * 2);

                if (Header.ShapeType == ShapeType.MultiPointZ)
                {
                    double[] shapeZ = new double[count];
                    Array.Copy(Z, start, shapeZ, 0, count);
                    shpStream.WriteLe(shapeZ.Min());
                    shpStream.WriteLe(shapeZ.Max());
                    shpStream.WriteLe(Z, start, count);
//.........这里部分代码省略.........
开发者ID:ExRam,项目名称:DotSpatial-PCL,代码行数:101,代码来源:MultiPointShapefile.cs

示例6: SaveAs

        /// <summary>
        /// Saves the shapefile to a different fileName, but still as a shapefile.  This method does not support saving to
        /// any other file format.
        /// </summary>
        /// <param name="fileName">The string fileName to save as</param>
        /// <param name="overwrite">A boolean that is true if the file should be overwritten</param>
        public override void SaveAs(string fileName, bool overwrite)
        {
            EnsureValidFileToSave(fileName, overwrite);
            Filename = fileName;
            
            // Set Header.ShapeType before setting extent.
            // wordSize is the length of the byte representation in 16 bit words of a single shape, including header.
            int wordSize = 14; // 3 int(2) and 2 double(4)
            if (CoordinateType == CoordinateType.Regular)
            {
                Header.ShapeType = ShapeType.Point;
            }
            if (CoordinateType == CoordinateType.M)
            {
                Header.ShapeType = ShapeType.PointM;
                wordSize = 18; // 3 int(2), 3 double(4)
            }
            if (CoordinateType == CoordinateType.Z)
            {
                Header.ShapeType = ShapeType.PointZ;
                wordSize = 22; // 3 int(2), 4 double (4)
            }

            InvalidateEnvelope();
            Header.SetExtent(Extent);

            if (IndexMode)
            {
                Header.ShxLength = ShapeIndices.Count * 4 + 50;
                Header.FileLength = ShapeIndices.Count * wordSize + 50;
            }
            else
            {
                Header.ShxLength = Features.Count * 4 + 50;
                Header.FileLength = Features.Count * wordSize + 50;
            }

            Header.SaveAs(fileName);
            var shpStream = new FileStream(fileName, FileMode.Append, FileAccess.Write, FileShare.None, 1000000);
            var shxStream = new FileStream(Header.ShxFilename, FileMode.Append, FileAccess.Write, FileShare.None, 1000000);

            // Special slightly faster writing for index mode
            if (IndexMode)
            {
                for (int shp = 0; shp < ShapeIndices.Count; shp++)
                {
                    shpStream.WriteBe(shp + 1);
                    shpStream.WriteBe(wordSize - 4); // shape word size without 4 shapeHeader words.
                    shxStream.WriteBe(50 + shp * wordSize);
                    shxStream.WriteBe(wordSize - 4);
                    shpStream.WriteLe((int)Header.ShapeType);
                    shpStream.WriteLe(Vertex[shp * 2]);
                    shpStream.WriteLe(Vertex[shp * 2 + 1]);
                    if (Z != null) shpStream.WriteLe(Z[shp]);
                    if (M != null) shpStream.WriteLe(M[shp]);
                }
            }
            else
            {
                int fid = 0;
                foreach (IFeature f in Features)
                {
                    Coordinate c = f.BasicGeometry.Coordinates[0];
                    shpStream.WriteBe(fid + 1);
                    shpStream.WriteBe(wordSize - 4);
                    shxStream.WriteBe(50 + fid * wordSize);
                    shxStream.WriteBe(wordSize - 4);
                    shpStream.WriteLe((int)Header.ShapeType);
                    if (Header.ShapeType == ShapeType.NullShape)
                    {
                        continue;
                    }
                    shpStream.WriteLe(c.X);
                    shpStream.WriteLe(c.Y);
                    if (Header.ShapeType == ShapeType.PointZ)
                    {
                        shpStream.WriteLe(c.Z);
                    }
                    if (Header.ShapeType == ShapeType.PointM || Header.ShapeType == ShapeType.PointZ)
                    {
                        shpStream.WriteLe(c.M);
                    }
                    fid++;
                }
            }
            
            shpStream.Close();
            shxStream.Close();

            UpdateAttributes();
            SaveProjection();
        }
开发者ID:joelmuzz,项目名称:DotSpatial,代码行数:98,代码来源:PointShapefile.cs

示例7: SaveAs

        /// <summary>
        /// Saves the shapefile to a different filename, but still as a shapefile.  This method does not support saving to 
        /// any other file format.
        /// </summary>
        /// <param name="filename">The string filename to save as</param>
        /// <param name="overwrite">A boolean that is true if the file should be overwritten</param>
        public override void SaveAs(string filename, bool overwrite)
        {
            Filename = filename;
            string dir = Path.GetDirectoryName(filename);
            if (!Directory.Exists(dir))
            {
                if (MessageBox.Show("Directory " + dir + " does not exist.  Do you want to create it?", "Create Directory?", MessageBoxButtons.YesNo) != DialogResult.OK)
                    return;
                Directory.CreateDirectory(dir);
            }
            InvalidateEnvelope();
            Header.Xmin = Envelope.Minimum.X;
            Header.Xmax = Envelope.Maximum.X;
            Header.Ymin = Envelope.Minimum.Y;
            Header.Ymax = Envelope.Maximum.Y;
            if (CoordinateType == CoordinateTypes.Regular)
            {
                Header.ShapeType = ShapeTypes.Point;
            }
            if (CoordinateType == CoordinateTypes.M)
            {
                Header.ShapeType = ShapeTypes.PointM;
            }
            if (CoordinateType == CoordinateTypes.Z)
            {
                Header.ShapeType = ShapeTypes.PointZ;
            }
            if (Header.ShapeType == ShapeTypes.Point || Header.ShapeType == ShapeTypes.PointM)
            {
                // test to see if the coordinates have added z or m values in the first coordinate
                int numOrdinates = 2;
                if (!IndexMode)
                {
                    if (Features.Count > 0)
                    {
                        Coordinate c = Features[0].BasicGeometry.Coordinates[0];
                        if (!double.IsNaN(c.Z)) numOrdinates = 3;
                    }
                }
                else
                {
                    if (Z != null && Z.Length == ShapeIndices.Count)
                    {
                        numOrdinates = 3;
                    }
                }
                if (numOrdinates > 2)
                {
                    Header.ShapeType = ShapeTypes.PointZ;
                    Header.FileLength = 18 * Features.Count + 50;
                }
            } 
            if (Header.ShapeType == ShapeTypes.PointZ)
            {
                Header.Zmin = Envelope.Minimum.Z;
                Header.Zmax = Envelope.Maximum.Z;
            }
            
            if (Header.ShapeType == ShapeTypes.PointM || Header.ShapeType == ShapeTypes.PointZ)
            {
                Header.Mmin = Envelope.Minimum.M;
                Header.Mmax = Envelope.Maximum.M;
            }
            
            if(IndexMode)
            {
                Header.ShxLength = ShapeIndices.Count * 4 + 50;
                
            }
            else
            {
                Header.ShxLength = Features.Count * 4 + 50;
            }
            
            Header.SaveAs(filename);
            Stream shpStream = new FileStream(filename, FileMode.Append, FileAccess.Write, FileShare.None, 1000000);
            Stream shxStream = new FileStream(Header.ShxFilename, FileMode.Append, FileAccess.Write, FileShare.None, 1000000);

            int len = 10;
            if (Header.ShapeType == ShapeTypes.PointM) len = 14;
            if (Header.ShapeType == ShapeTypes.PointZ) len = 18;



            // Special slightly faster writing for index mode
            if(IndexMode)
            {
                for(int shp = 0; shp < ShapeIndices.Count; shp++)
                {
                    shpStream.WriteBe(shp + 1);
                    shpStream.WriteBe(len);
                    shxStream.WriteBe(50 + shp * (len + 4));
                    shxStream.WriteBe(len);
                    shpStream.WriteLe((int)Header.ShapeType);
//.........这里部分代码省略.........
开发者ID:zhongshuiyuan,项目名称:mapwindowsix,代码行数:101,代码来源:PointShapefile.cs

示例8: AppendBasicGeometry

        /// <inheritdocs/>
        protected override void AppendBasicGeometry(ShapefileHeader header, IBasicGeometry feature, int numFeatures)
        {
            FileInfo fi = new FileInfo(Filename);
            int offset = Convert.ToInt32(fi.Length / 2);

            FileStream shpStream = new FileStream(Filename, FileMode.Append, FileAccess.Write, FileShare.None, 10000);
            FileStream shxStream = new FileStream(header.ShxFilename, FileMode.Append, FileAccess.Write, FileShare.None, 100);

            Coordinate point = feature.Coordinates[0];
            int contentLength = 6;
            if (header.ShapeType == ShapeType.PointM)
            {
                contentLength += 4; // one additional value (m)
            }
            if (header.ShapeType == ShapeType.PointZ)
            {
                contentLength += 8; // 2 additional values (m, z)
            }

            //                                              Index File
            //                                              ---------------------------------------------------------
            //                                              Position     Value               Type        Number      Byte Order
            //                                              ---------------------------------------------------------
            shxStream.WriteBe(offset);                      // Byte 0     Offset             Integer     1           Big
            shxStream.WriteBe(contentLength);               // Byte 4    Content Length      Integer     1           Big
            shxStream.Flush();
            shxStream.Close();
            //                                              X Y Points
            //                                              ---------------------------------------------------------
            //                                              Position     Value               Type        Number      Byte Order
            //                                              ---------------------------------------------------------
            shpStream.WriteBe(numFeatures);                 // Byte 0       Record Number       Integer     1           Big
            shpStream.WriteBe(contentLength);               // Byte 4       Content Length      Integer     1           Big
            shpStream.WriteLe((int)header.ShapeType);       // Byte 8       Shape Type 3        Integer     1           Little
            if (header.ShapeType == ShapeType.NullShape)
            {
                return;
            }

            shpStream.WriteLe(point.X);             // Byte 12      X                   Double      1           Little
            shpStream.WriteLe(point.Y);             // Byte 20      Y                   Double      1           Little

            if (header.ShapeType == ShapeType.PointM)
            {
                shpStream.WriteLe(point.M);                            // Byte 28      M                   Double      1           Little
            }
            else if (header.ShapeType == ShapeType.PointZ)
            {
                shpStream.WriteLe(point.Z);                            // Byte 28      Z                   Double      1           Little
                shpStream.WriteLe(point.M);                            // Byte 36      M                   Double      1           Little
            }
            shpStream.Flush();
            shpStream.Close();
            offset += contentLength;
            Shapefile.WriteFileLength(Filename, offset);
            Shapefile.WriteFileLength(header.ShxFilename, 50 + numFeatures * 4);
        }
开发者ID:DIVEROVIEDO,项目名称:DotSpatial,代码行数:58,代码来源:PointShapefileFeatureSource.cs

示例9: WriteFeatures

        protected override void WriteFeatures(string fileName)
        {
            // Set Header.ShapeType before setting extent.
            switch (CoordinateType)
            {
                case CoordinateType.Regular:
                    Header.ShapeType = ShapeType.MultiPoint;
                    break;
                case CoordinateType.M:
                    Header.ShapeType = ShapeType.MultiPointM;
                    break;
                case CoordinateType.Z:
                    Header.ShapeType = ShapeType.MultiPointZ;
                    break;
                default:
                    throw new Exception("Unsupported CoordinateType");
            }

            // Calculate total .shp file length
            var totalOffset = 50;
            for (var shp = 0; shp < Count; shp++)
            {
                var f = GetFeature(shp);
                totalOffset += GetContentLength(f);
            }

            // Save headers for .shp and .shx files
            InvalidateEnvelope();
            Header.SetExtent(Extent);
            Header.ShxLength = 50 + Count * 4;
            Header.FileLength = totalOffset;
            Header.SaveAs(fileName);

            // Reset shapeheaders
            ResetShapeHeaders();

            // Append data into .shp and .shx
            int offset = 50;
            using (var shpStream = new FileStream(Header.Filename, FileMode.Append))
            using (var shxStream = new FileStream(Header.ShxFilename, FileMode.Append))
            {
                for (var shp = 0; shp < Count; shp++)
                {
                    shpStream.WriteBe(shp + 1);
                    var feature = GetFeature(shp);
                    var shpt = feature.ShapeType.GetValueOrDefault(Header.ShapeType);
                    var contentLen = GetContentLength(feature);

                    shpStream.WriteBe(contentLen - 4);
                    shpStream.WriteLe((int)shpt);
                    if (shpt != ShapeType.NullShape)
                    {
                        // Bounding Box
                        var extent = feature.Envelope.ToExtent();
                        shpStream.WriteLe(extent.MinX);
                        shpStream.WriteLe(extent.MinY);
                        shpStream.WriteLe(extent.MaxX);
                        shpStream.WriteLe(extent.MaxY);

                        // NumPoints
                        shpStream.WriteLe(feature.NumPoints);

                        // XY coordinates
                        for (int i = 0; i < feature.NumPoints; i++)
                        {
                            shpStream.WriteLe(feature.Coordinates[i].X);
                            shpStream.WriteLe(feature.Coordinates[i].Y);
                        }

                        // Z coordinates
                        if (shpt == ShapeType.MultiPointZ)
                        {
                            // Z-box
                            var minZ = feature.Coordinates.Min(_ => _.Z);
                            var maxZ = feature.Coordinates.Max(_ => _.Z);
                            shpStream.WriteLe(minZ);
                            shpStream.WriteLe(maxZ);

                            // Z coordinates
                            for (var i = 0; i < feature.NumPoints; i++)
                            {
                                shpStream.WriteLe(feature.Coordinates[i].Z);
                            }
                        }

                        // M coordinates
                        if (shpt == ShapeType.MultiPointZ || shpt == ShapeType.MultiPointM)
                        {
                            // M-box
                            var minm = feature.Coordinates.Min(_ => _.M);
                            var maxm = feature.Coordinates.Max(_ => _.M);
                            shpStream.WriteLe(minm);
                            shpStream.WriteLe(maxm);

                            // M coordinates
                            for (var i = 0; i < feature.NumPoints; i++)
                            {
                                shpStream.WriteLe(feature.Coordinates[i].M);
                            }
                        }
//.........这里部分代码省略.........
开发者ID:hanchao,项目名称:DotSpatial,代码行数:101,代码来源:MultiPointShapefile.cs

示例10: SaveAsIndexed

        private void SaveAsIndexed(string fileName)
        {
            var shpStream = new FileStream(fileName, FileMode.Append, FileAccess.Write, FileShare.None, 10000000);
            var shxStream = new FileStream(Header.ShxFilename, FileMode.Append, FileAccess.Write, FileShare.None, 10000000);
            int fid = 0;
            int offset = 50; // the shapefile header starts at 100 bytes, so the initial offset is 50 words
            int contentLength = 0;

            foreach (ShapeRange shape in ShapeIndices)
            {
                offset += contentLength; // adding the previous content length from each loop calculates the word offset

                contentLength = 20;

                if (Header.ShapeType == ShapeType.MultiPoint)
                {
                    contentLength += shape.NumPoints * 8;
                }
                if (Header.ShapeType == ShapeType.MultiPointM)
                {
                    contentLength += 8; // mmin, mmax
                    contentLength += shape.NumPoints * 12;
                }
                if (Header.ShapeType == ShapeType.MultiPointZ)
                {
                    contentLength += 16; // mmin, mmax, zmin, zmax
                    contentLength += shape.NumPoints * 16;
                }

                //                                         Index File
                //                                         ---------------------------------------------------------
                //                                        Position     Value   Type     Number  Byte Order
                //                                        ---------------------------------------------------------
                shxStream.WriteBe(offset);                 // Byte 0  Offset   Integer    1     Big
                shxStream.WriteBe(contentLength);          // Byte 4  Length   Integer    1     Big

                //                                         X Y Poly Lines
                //                                         ---------------------------------------------------------
                //                                          Position  Value    Type      Number  Byte Order
                //                                        ---------------------------------------------------------
                shpStream.WriteBe(fid + 1);                // Byte 0  Record   Integer     1     Big
                shpStream.WriteBe(contentLength);          // Byte 4  Length   Integer     1     Big
                shpStream.WriteLe((int)Header.ShapeType);  // Byte 8  Type 3   Integer     1     Little
                if (Header.ShapeType == ShapeType.NullShape)
                {
                    continue;
                }
                shpStream.WriteLe(shape.Extent.MinX);     // Byte 12  Xmin     Double      1     Little
                shpStream.WriteLe(shape.Extent.MinY);     // Byte 20  Ymin     Double      1     Little
                shpStream.WriteLe(shape.Extent.MaxX);     // Byte 28  Xmax     Double      1     Little
                shpStream.WriteLe(shape.Extent.MaxY);     // Byte 36  Ymax     Double      1     Little
                shpStream.WriteLe(shape.NumPoints);       // Byte 44  #Points  Integer     1     Little

                int start = shape.StartIndex;
                int count = shape.NumPoints;
                shpStream.WriteLe(Vertex, start * 2, count * 2);

                if (Header.ShapeType == ShapeType.MultiPointZ)
                {
                    double[] shapeZ = new double[count];
                    Array.Copy(Z, start, shapeZ, 0, count);
                    shpStream.WriteLe(shapeZ.Min());
                    shpStream.WriteLe(shapeZ.Max());
                    shpStream.WriteLe(Z, start, count);
                }
                if (Header.ShapeType == ShapeType.MultiPointM || Header.ShapeType == ShapeType.MultiPointZ)
                {
                    if (M != null && M.Length >= start + count)
                    {
                        double[] shapeM = new double[count];
                        Array.Copy(M, start, shapeM, 0, count);
                        shpStream.WriteLe(shapeM.Min());
                        shpStream.WriteLe(shapeM.Max());
                        shpStream.WriteLe(M, start, count);
                    }
                }

                fid++;
                offset += 4;
            }
            
            shpStream.Close();
            shxStream.Close();

            offset += contentLength;
            WriteFileLength(Filename, offset);
            UpdateAttributes();
            SaveProjection();
        }
开发者ID:joelmuzz,项目名称:DotSpatial,代码行数:89,代码来源:MultiPointShapefile.cs

示例11: WriteHeader

        /// <summary>
        /// Writes the current content to the specified file.
        /// </summary>
        /// <param name="header">The header to write</param>
        /// <param name="fileName">Basically the same code can be used for the shp and shx files</param>
        /// <param name="numShapes">The integer number of shapes to write to the file</param>
        private static void WriteHeader(ShapefileHeader header, string fileName, int numShapes)
        {
            string dir = Path.GetDirectoryName(fileName);
            if (dir != null)
            {
                if (!Directory.Exists(dir))
                {
                    Directory.CreateDirectory(dir);
                }
            }

            FileStream bbWriter = new FileStream(fileName, FileMode.Create, FileAccess.Write, FileShare.None, 100);

            bbWriter.WriteBe(header.FileCode);                     //  Byte 0          File Code       9994        Integer     Big

            byte[] bt = new byte[20];
            bbWriter.Write(bt, 0, 20);                                   //  Bytes 4 - 20 are unused

            // This is overwritten later
            bbWriter.WriteBe(50 + 4 * numShapes);                //  Byte 24         File Length     File Length Integer     Big

            bbWriter.WriteLe(header.Version);                             //  Byte 28         Version         1000        Integer     Little

            bbWriter.WriteLe((int)header.ShapeType);                      //  Byte 32         Shape Type      Shape Type  Integer     Little

            bbWriter.WriteLe(header.Xmin);                                //  Byte 36         Bounding Box    Xmin        Double      Little

            bbWriter.WriteLe(header.Ymin);                                //  Byte 44         Bounding Box    Ymin        Double      Little

            bbWriter.WriteLe(header.Xmax);                                //  Byte 52         Bounding Box    Xmax        Double      Little

            bbWriter.WriteLe(header.Ymax);                                //  Byte 60         Bounding Box    Ymax        Double      Little

            bbWriter.WriteLe(header.Zmin);                                //  Byte 68         Bounding Box    Zmin        Double      Little

            bbWriter.WriteLe(header.Zmax);                                //  Byte 76         Bounding Box    Zmax        Double      Little

            bbWriter.WriteLe(header.Mmin);                                //  Byte 84         Bounding Box    Mmin        Double      Little

            bbWriter.WriteLe(header.Mmax);                                //  Byte 92         Bounding Box    Mmax        Double      Little

            // ------------ WRITE TO SHP FILE -------------------------

            bbWriter.Close();
        }
开发者ID:DIVEROVIEDO,项目名称:DotSpatial,代码行数:51,代码来源:ShapefileIndexFile.cs

示例12: SaveAsIndexed

        /// <summary>
        /// Saves the file to a new location
        /// </summary>
        /// <param name="fileName">The fileName to save</param>
        /// <param name="overwrite">Boolean that specifies whether or not to overwrite the existing file</param>
        private void SaveAsIndexed(string fileName, bool overwrite)
        {
            Filename = fileName;
            string dir = Path.GetDirectoryName(fileName);
            if (dir != null && !Directory.Exists(dir))
            {
                Directory.CreateDirectory(dir);
            }
            if (File.Exists(fileName))
            {
                if (fileName != Filename && overwrite == false) throw new IOException("File exists.");
                File.Delete(fileName);

                string shx = Path.ChangeExtension(fileName, ".shx");
                if (File.Exists(shx)) File.Delete(shx);
            }

            // comment out by keen edge as per this discussion
            // http://dotspatial.codeplex.com/Thread/View.aspx?ThreadId=234754
            // InvalidateEnvelope();

            if (CoordinateType == CoordinateType.Regular)
            {
                Header.ShapeType = ShapeType.PolyLine;
            }
            if (CoordinateType == CoordinateType.M)
            {
                Header.ShapeType = ShapeType.PolyLineM;
            }
            if (CoordinateType == CoordinateType.Z)
            {
                Header.ShapeType = ShapeType.PolyLineZ;
            }
            // Set Header.ShapeType before calling SetExtent.
            Header.SetExtent(MyExtent);

            Header.ShxLength = ShapeIndices.Count * 4 + 50;
            Header.SaveAs(fileName);

            FileStream shpStream = new FileStream(fileName, FileMode.Append, FileAccess.Write, FileShare.None, 10000000);
            FileStream shxStream = new FileStream(Header.ShxFilename, FileMode.Append, FileAccess.Write, FileShare.None, 10000000);
            int fid = 0;
            int offset = 50; // the shapefile header starts at 100 bytes, so the initial offset is 50 words
            int contentLength = 0;

            foreach (ShapeRange shape in ShapeIndices)
            {
                offset += contentLength; // adding the previous content length from each loop calculates the word offset

                contentLength = 22;
                contentLength += 2 * shape.Parts.Count;
                if (Header.ShapeType == ShapeType.PolyLine)
                {
                    contentLength += shape.NumPoints * 8; // x, y
                }
                if (Header.ShapeType == ShapeType.PolyLineM)
                {
                    contentLength += 8; // mmin mmax
                    contentLength += shape.NumPoints * 12; // x, y, m
                }
                if (Header.ShapeType == ShapeType.PolyLineZ)
                {
                    contentLength += 16; // mmin, mmax, zmin, zmax
                    contentLength += shape.NumPoints * 16; // x, y, z, m
                }

                //                                              Index File
                //                                              ---------------------------------------------------------
                //                                              Position     Value               Type        Number      Byte Order
                //                                              ---------------------------------------------------------
                shxStream.WriteBe(offset);                     // Byte 0     Offset             Integer     1           Big
                shxStream.WriteBe(contentLength);              // Byte 4     Content Length     Integer     1           Big

                //                                              X Y Poly Lines
                //                                              ---------------------------------------------------------
                //                                              Position     Value               Type        Number      Byte Order
                //                                              ---------------------------------------------------------
                shpStream.WriteBe(fid + 1);                     // Byte 0       Record Number       Integer     1           Big
                shpStream.WriteBe(contentLength);               // Byte 4       Content Length      Integer     1           Big
                shpStream.WriteLe((int)Header.ShapeType);       // Byte 8       Shape Type 3        Integer     1           Little
                if (Header.ShapeType == ShapeType.NullShape)
                {
                    continue;
                }
                shpStream.WriteLe(shape.Extent.MinX);             // Byte 12      Xmin                Double      1           Little
                shpStream.WriteLe(shape.Extent.MinY);             // Byte 20      Ymin                Double      1           Little
                shpStream.WriteLe(shape.Extent.MaxX);             // Byte 28      Xmax                Double      1           Little
                shpStream.WriteLe(shape.Extent.MaxY);             // Byte 36      Ymax                Double      1           Little
                shpStream.WriteLe(shape.NumParts);                 // Byte 44      NumParts            Integer     1           Little
                shpStream.WriteLe(shape.NumPoints);                // Byte 48      NumPoints           Integer     1           Little
                // Byte 52      Parts               Integer     NumParts    Little
                foreach (PartRange part in shape.Parts)
                {
                    shpStream.WriteLe(part.PartOffset);
                }
//.........这里部分代码省略.........
开发者ID:DIVEROVIEDO,项目名称:DotSpatial,代码行数:101,代码来源:LineShapefile.cs

示例13: WriteFeatures

        protected override void WriteFeatures(string fileName)
        {
            // Set Header.ShapeType before setting extent.
            switch (CoordinateType)
            {
                case CoordinateType.Regular:
                    Header.ShapeType = FeatureType == FeatureType.Line ? ShapeType.PolyLine : ShapeType.Polygon;
                    break;
                case CoordinateType.M:
                    Header.ShapeType = FeatureType == FeatureType.Line ? ShapeType.PolyLineM : ShapeType.PolygonM;
                    break;
                case CoordinateType.Z:
                    Header.ShapeType = FeatureType == FeatureType.Line ? ShapeType.PolyLineZ : ShapeType.PolygonZ;
                    break;
                default:
                    throw new Exception("Unsupported CoordinateType");
            }

            // Calculate total .shp file length
            var totalOffset = 50;
            for (var shp = 0; shp < Count; shp++)
            {
                var f = GetFeature(shp);
                totalOffset += GetContentLength(f);
            }

            // Save headers for .shp and .shx files
            InvalidateEnvelope();
            Header.SetExtent(Extent);
            Header.ShxLength = 50 + Count * 4;
            Header.FileLength = totalOffset;
            Header.SaveAs(fileName);

            // Reset shapeheaders
            ResetShapeHeaders();

            // Append data into .shp and .shx
            int offset = 50;
            using (var shpStream = new FileStream(Header.Filename, FileMode.Append))
            using (var shxStream = new FileStream(Header.ShxFilename, FileMode.Append))
            {
                for (var shp = 0; shp < Count; shp++)
                {
                    shpStream.WriteBe(shp + 1);
                    var feature = GetFeature(shp);
                    var shpt = feature.ShapeType.GetValueOrDefault(Header.ShapeType);
                    var contentLen = GetContentLength(feature);

                    shpStream.WriteBe(contentLen - 4);
                    shpStream.WriteLe((int)shpt);
                    if (shpt != ShapeType.NullShape)
                    {
                        // Bounding Box
                        var extent = feature.Envelope.ToExtent();
                        shpStream.WriteLe(extent.MinX);
                        shpStream.WriteLe(extent.MinY);
                        shpStream.WriteLe(extent.MaxX);
                        shpStream.WriteLe(extent.MaxY);

                        // NumParts
                        shpStream.WriteLe(feature.NumGeometries);

                        // NumPoints
                        shpStream.WriteLe(feature.NumPoints);

                        // Parts and Points
                        var parts = new int[feature.NumGeometries];
                        var points = new List<Coordinate>(feature.NumPoints);
                        for (var iPart = 0; iPart < feature.NumGeometries; iPart++)
                        {
                            parts[iPart] = points.Count;
                            var bl = feature.GetBasicGeometryN(iPart);
                            points.AddRange(bl.Coordinates);
                        }

                        // Parts
                        shpStream.WriteLe(parts, 0, parts.Length);

                        // XY coordinates
                        foreach (var t in points)
                        {
                            shpStream.WriteLe(t.X);
                            shpStream.WriteLe(t.Y);
                        }

                        // Z coordinates
                        if (shpt == ShapeType.PolyLineZ || shpt == ShapeType.PolygonZ)
                        {
                            // Z-box
                            var minZ = feature.Coordinates.Min(_ => _.Z);
                            var maxZ = feature.Coordinates.Max(_ => _.Z);
                            shpStream.WriteLe(minZ);
                            shpStream.WriteLe(maxZ);

                            // Z coordinates
                            for (var i = 0; i < feature.NumPoints; i++)
                            {
                                shpStream.WriteLe(feature.Coordinates[i].Z);
                            }
                        }
//.........这里部分代码省略.........
开发者ID:hanchao,项目名称:DotSpatial,代码行数:101,代码来源:LineShapefile.cs

示例14: SaveAsIndexed

        /// <summary>
        /// Saves the file to a new location
        /// </summary>
        /// <param name="filename">The filename to save</param>
        /// <param name="overwrite">Boolean that specifies whether or not to overwrite the existing file</param>
        private void SaveAsIndexed(string filename, bool overwrite)
        {

            if (File.Exists(filename) && filename != Filename && overwrite == false)
            {
                if (MessageBox.Show("The file already exists.  Do you wish to overwrite it?", "File Exists", MessageBoxButtons.YesNo) == DialogResult.No) return;
                File.Delete(filename);
            }
            string dir = Path.GetDirectoryName(filename);
            if (!Directory.Exists(dir))
            {
                if (MessageBox.Show("Directory " + dir + " does not exist.  Do you want to create it?", "Create Directory?", MessageBoxButtons.YesNo) != DialogResult.OK)
                    return;
                Directory.CreateDirectory(dir);
            }
            Header.Xmin = Envelope.Minimum.X;
            Header.Xmax = Envelope.Maximum.X;
            Header.Ymin = Envelope.Minimum.Y;
            Header.Ymax = Envelope.Maximum.Y;
            if (CoordinateType == CoordinateTypes.Regular)
            {
                Header.ShapeType = ShapeTypes.MultiPoint;
            }
            if (CoordinateType == CoordinateTypes.M)
            {
                Header.ShapeType = ShapeTypes.MultiPointM;
            }
            if (CoordinateType == CoordinateTypes.Z)
            {
                Header.ShapeType = ShapeTypes.MultiPointZ;
            }
            if (Header.ShapeType == ShapeTypes.PolygonZ)
            {
                Header.Zmin = Z.Min();
                Header.Zmax = Z.Max();
            }
            if (Header.ShapeType == ShapeTypes.PolygonM || Header.ShapeType == ShapeTypes.PolygonZ)
            {
                Header.Mmin = M.Min();
                Header.Mmax = M.Max();
            }

            Header.ShxLength = ShapeIndices.Count * 4 + 50;
            Header.SaveAs(filename);

            FileStream shpStream = new FileStream(filename, FileMode.Append, FileAccess.Write, FileShare.None, 10000000);
            FileStream shxStream = new FileStream(Header.ShxFilename, FileMode.Append, FileAccess.Write, FileShare.None, 10000000);
            int fid = 0;
            int offset = 50; // the shapefile header starts at 100 bytes, so the initial offset is 50 words
            int contentLength = 0;

            foreach (ShapeRange shape in ShapeIndices)
            {
                offset += contentLength; // adding the previous content length from each loop calculates the word offset
               
                contentLength = 20;
                

                if (Header.ShapeType == ShapeTypes.MultiPoint)
                {

                    contentLength += shape.NumPoints * 8;
                }
                if (Header.ShapeType == ShapeTypes.MultiPointM)
                {
                    contentLength += 8; // mmin, mmax
                    contentLength += shape.NumPoints * 12;
                }
                if (Header.ShapeType == ShapeTypes.MultiPointZ)
                {
                    contentLength += 16; // mmin, mmax, zmin, zmax
                    contentLength += shape.NumPoints * 16;
                }

                //                                              Index File
                //                                              ---------------------------------------------------------
                //                                              Position     Value               Type        Number      Byte Order
                //                                              ---------------------------------------------------------
                shxStream.WriteBe(offset);                      // Byte 0       Offset       Integer     1           Big                 
                shxStream.WriteBe(contentLength);               // Byte 4       Content Length       Integer     1           Big

                //                                              X Y Poly Lines
                //                                              ---------------------------------------------------------
                //                                              Position     Value               Type        Number      Byte Order
                //                                              ---------------------------------------------------------
                shpStream.WriteBe(fid + 1);                     // Byte 0       Record Number       Integer     1           Big
                shpStream.WriteBe(contentLength);               // Byte 4       Content Length      Integer     1           Big
                shpStream.WriteLe((int)Header.ShapeType);       // Byte 8       Shape Type 3        Integer     1           Little
                if (Header.ShapeType == ShapeTypes.NullShape)
                {
                    continue;
                }
                shpStream.WriteLe(shape.Extent.XMin);             // Byte 12      Xmin                Double      1           Little
                shpStream.WriteLe(shape.Extent.YMin);             // Byte 20      Ymin                Double      1           Little
                shpStream.WriteLe(shape.Extent.XMax);             // Byte 28      Xmax                Double      1           Little
//.........这里部分代码省略.........
开发者ID:zhongshuiyuan,项目名称:mapwindowsix,代码行数:101,代码来源:MultiPointShapefile.cs

示例15: WriteFeatures

        protected override void WriteFeatures(string fileName)
        {
            // Set Header.ShapeType before setting extent.
            // wordSize is the length of the byte representation in 16 bit words of a single shape, including header.
            int wordSize;
            switch (CoordinateType)
            {
                case CoordinateType.Regular:
                    Header.ShapeType = ShapeType.Point;
                    wordSize = 14; // 3 int(2) and 2 double(4) = X,Y
                    break;
                case CoordinateType.M:
                    Header.ShapeType = ShapeType.PointM;
                    wordSize = 18; // 3 int(2), 3 double(4) = X,Y,M
                    break;
                case CoordinateType.Z:
                    Header.ShapeType = ShapeType.PointZ;
                    wordSize = 22; // 3 int(2), 4 double (4) = X,Y,Z,M
                    break;
                default:
                    throw new Exception("Unsupported CoordinateType");
            }

            // Calculate total .shp file length
            var totalOffset = 50;
            for (var shp = 0; shp < Count; shp++)
            {
                var f = GetFeature(shp);
                var shpt = f.ShapeType.GetValueOrDefault(Header.ShapeType);
                totalOffset += shpt == ShapeType.NullShape ? 6 : wordSize;
            }

            // Save headers for .shp and .shx files
            InvalidateEnvelope();
            Header.SetExtent(Extent);
            Header.ShxLength = 50 + Count * 4;
            Header.FileLength = totalOffset;
            Header.SaveAs(fileName);

            // Reset shapeheaders
            ResetShapeHeaders();

            // Append data into .shp and .shx
            int offset = 50;
            using (var shpStream = new FileStream(Header.Filename, FileMode.Append))
            using (var shxStream = new FileStream(Header.ShxFilename, FileMode.Append))
            {
                for (var shp = 0; shp < Count; shp++)
                {
                    shpStream.WriteBe(shp + 1);
                    var feature = GetFeature(shp);
                    var shpt = feature.ShapeType.GetValueOrDefault(Header.ShapeType);
                    var contentLen = shpt == ShapeType.NullShape ? 2 : wordSize - 4;

                    shpStream.WriteBe(contentLen);
                    shpStream.WriteLe((int)shpt);
                    if (shpt != ShapeType.NullShape)
                    {
                        var coordinate = feature.Coordinates[0];
                        shpStream.WriteLe(coordinate.X);
                        shpStream.WriteLe(coordinate.Y);
                        if (shpt == ShapeType.PointZ)
                            shpStream.WriteLe(coordinate.Z);
                        if (shpt == ShapeType.PointZ || shpt == ShapeType.PointM)
                            shpStream.WriteLe(coordinate.M);
                    }

                    shxStream.WriteBe(offset);
                    shxStream.WriteBe(contentLen);
                    offset += shpt == ShapeType.NullShape ? 6 : wordSize;
                }
            }
        }
开发者ID:hanchao,项目名称:DotSpatial,代码行数:73,代码来源:PointShapefile.cs


注:本文中的System.IO.FileStream.WriteLe方法示例由纯净天空整理自Github/MSDocs等开源代码及文档管理平台,相关代码片段筛选自各路编程大神贡献的开源项目,源码版权归原作者所有,传播和使用请参考对应项目的License;未经允许,请勿转载。