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C# IFeatureSet.GetAttributes方法代码示例

本文整理汇总了C#中IFeatureSet.GetAttributes方法的典型用法代码示例。如果您正苦于以下问题:C# IFeatureSet.GetAttributes方法的具体用法?C# IFeatureSet.GetAttributes怎么用?C# IFeatureSet.GetAttributes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IFeatureSet的用法示例。


在下文中一共展示了IFeatureSet.GetAttributes方法的1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: CopyFeatures

        /// <inheritdoc/>
        public void CopyFeatures(IFeatureSet source, bool copyAttributes)
        {
            ProgressMeter = new ProgressMeter(ProgressHandler, "Copying Features", ShapeIndices.Count);
            Vertex = source.Vertex.Copy();
            _shapeIndices = new List<ShapeRange>();
            foreach (ShapeRange range in source.ShapeIndices)
            {
                _shapeIndices.Add(range.Copy());
            }

            if (copyAttributes)
            {
                foreach (DataColumn dc in source.GetColumns())
                {
                    if (dc != null)
                    {
                        DataColumn outCol = new DataColumn(dc.ColumnName, dc.DataType, dc.Expression, dc.ColumnMapping);
                        Field fld = new Field(outCol);
                        DataTable.Columns.Add(fld);
                    }
                }
            }

            if (source.AttributesPopulated)
            {
                // Handle data table content directly
                if (!IndexMode)
                {
                    // If not in index mode, just handle this using features
                    Features.SuspendEvents();
                    int i = 0;
                    foreach (IFeature f in source.Features)
                    {
                        IFeature copy = AddFeature(f.BasicGeometry);
                        copy.ShapeIndex = ShapeIndices[i];
                        if (copyAttributes)
                        {
                            copy.DataRow.ItemArray = f.DataRow.ItemArray.Copy();
                        }

                        i++;
                    }

                    Features.ResumeEvents();
                }
                else
                {
                    // We need to copy the attributes, but just copy a datarow
                    if (copyAttributes)
                    {
                        foreach (DataRow row in source.DataTable.Rows)
                        {
                            DataRow result = DataTable.NewRow();
                            result.ItemArray = row.ItemArray.Copy();
                            DataTable.Rows.Add(result);
                        }
                    }
                }
            }
            else
            {
                AttributesPopulated = false;

                // Handle data table content directly
                if (!IndexMode)
                {
                    // If not in index mode, just handle this using features
                    Features.SuspendEvents();
                    int i = 0;
                    foreach (IFeature f in source.Features)
                    {
                        IFeature result = AddFeature(f.BasicGeometry);
                        result.ShapeIndex = ShapeIndices[i];
                        i++;
                    }

                    Features.ResumeEvents();
                }

                if (copyAttributes)
                {
                    // We need to copy the attributes, but use the page system
                    int maxRow = NumRows();
                    const int pageSize = 10000;
                    int numPages = (int)Math.Ceiling(maxRow / (double)pageSize);
                    for (int i = 0; i < numPages; i++)
                    {
                        int numRows = pageSize;
                        if (i == numPages - 1)
                        {
                            numRows = numPages - (pageSize * i);
                        }

                        DataTable dt = source.GetAttributes(i * pageSize, numRows);
                        SetAttributes(i * pageSize, dt);
                    }
                }
            }
        }
开发者ID:hanchao,项目名称:DotSpatial,代码行数:100,代码来源:FeatureSet.cs


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