本文整理汇总了C#中IProvider.GetFeature方法的典型用法代码示例。如果您正苦于以下问题：C# IProvider.GetFeature方法的具体用法？C# IProvider.GetFeature怎么用？C# IProvider.GetFeature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类IProvider的用法示例。
在下文中一共展示了IProvider.GetFeature方法的5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: TestProvider
private static void TestProvider(IProvider provider, GpkgContent content)
{
int numFeatures = 0;
Assert.DoesNotThrow(() => numFeatures = provider.GetFeatureCount(),
"GetFeatureCount threw exception:\n\tConnection{0}\n\t{1}",
provider.ConnectionID, content.TableName);
var extent = provider.GetExtents();
Collection<uint> oids = null;
Assert.DoesNotThrow(() => oids = provider.GetObjectIDsInView(extent),
"GetObjectIDsInView threw exception:\n\tConnection{0}\n\t{1}",
provider.ConnectionID, content.TableName);
Assert.AreEqual(numFeatures, oids.Count);
foreach (var oid in oids)
{
IGeometry geom = null;
Assert.DoesNotThrow(() => geom = provider.GetGeometryByID(oid),
"GetGeometryByID threw exception:\n\tConnection{0}\n\t{1}",
provider.ConnectionID, content.TableName);
FeatureDataRow feat = null;
Assert.DoesNotThrow(() => feat = provider.GetFeature(oid),
"GetFeature threw exception:\n\tConnection{0}\n\t{1}",
provider.ConnectionID, content.TableName);
Assert.IsTrue(geom.EqualsExact(feat.Geometry));
}
Collection<IGeometry> geoms = null;
Assert.DoesNotThrow(() => geoms = provider.GetGeometriesInView(extent),
"GetFeature threw exception:\n\tConnection{0}\n\t{1}",
provider.ConnectionID, content.TableName);
Assert.AreEqual(numFeatures, geoms.Count);
var fds = new FeatureDataSet();
Assert.DoesNotThrow(() => provider.ExecuteIntersectionQuery(extent, fds),
"GetFeature threw exception:\n\tConnection{0}\n\t{1}",
provider.ConnectionID, content.TableName);
Assert.AreEqual(numFeatures, fds.Tables[0].Rows.Count);
}示例2: BuildFromProvider
/// <summary>
/// Builds from the given provider.
/// </summary>
/// <param name="provider">
/// The base <see cref="SharpMap.Data.Providers.IProvider"/>
/// from witch initialize the <see cref="NtsProvider"/> instance.
/// </param>
private void BuildFromProvider(IProvider provider)
{
// Features list initialization
features = new List<Feature>(provider.GetFeatureCount());
try
{
// Load all features from the given provider
provider.Open();
Collection<uint> ids = provider.GetObjectIDsInView(provider.GetExtents());
foreach (uint id in ids)
{
FeatureDataRow dataRow = provider.GetFeature(id);
GisSharpBlog.NetTopologySuite.Geometries.Geometry geometry =
GeometryConverter.ToNTSGeometry(dataRow.Geometry, geometryFactory);
AttributesTable attributes = new AttributesTable();
foreach (DataColumn column in dataRow.Table.Columns)
{
if (dataRow[column] == null || dataRow[column].GetType() == typeof (DBNull))
throw new ApplicationException("Null values not supported");
attributes.AddAttribute(column.ColumnName, dataRow[column]);
}
features.Add(new Feature(geometry, attributes));
}
}
finally
{
if (provider.IsOpen)
provider.Close();
}
}示例3: CreateDataTable
/// <summary>
/// Creates a new table in a Microsoft SQL Server database and copies rows from an existing datasource.
/// </summary>
/// <remarks>
/// <para>The datatable created will contain six extra columns besides the attribute data: "OID" (Object ID row),
/// "WKB_Geometry" (Geometry stored as WKB), and Envelope_MinX, Envelope_MinY, Envelope_MaxX, Envelope_MaxY
/// for geometry bounding box.</para>
/// <para>
/// <example>
/// Upload a ShapeFile to a database:
/// <code>
/// public void CreateDatabase(string shapeFile)
/// {
/// if (!System.IO.File.Exists(shapeFile))
/// {
/// MessageBox.Show("File not found");
/// return;
/// }
/// ShapeFile shp = new ShapeFile(shapeFile, false);
/// //Create tablename from filename
/// string tablename = shapeFile.Substring(shapeFile.LastIndexOf('\\') + 1,
/// shapeFile.LastIndexOf('.') - shapeFile.LastIndexOf('\\') - 1);
/// //Create connectionstring
/// string connstr = @"Data Source=.\SQLEXPRESS;AttachDbFilename=|DataDirectory|GeoDatabase.mdf;Integrated Security=True;User Instance=True";
/// int count = SharpMap.Data.Providers.MsSql.CreateDataTable(shp, tablename, connstr);
/// MessageBox.Show("Uploaded " + count.ToString() + " features to datatable '" + tablename + "'");
/// }
/// </code>
/// </example>
/// </para>
/// </remarks>
/// <param name="datasource">Datasource to upload</param>
/// <param name="tablename">Name of table to create (existing table will be overwritten!)</param>
/// <param name="connstr">Connection string to database</param>
/// <returns>Number or rows inserted, -1 if failed and 0 if table created but no rows inserted.</returns>
public static int CreateDataTable(IProvider datasource, string tablename, string connstr)
{
datasource.Open();
FeatureDataRow geom = datasource.GetFeature(0);
DataColumnCollection columns = geom.Table.Columns;
int counter = -1;
using (SQLiteConnection conn = new SQLiteConnection(connstr))
{
SQLiteCommand command = new SQLiteCommand();
command.Connection = conn;
conn.Open();
//Try to drop table if it exists
try
{
command.CommandText = "DROP TABLE \"" + tablename + "\";";
command.ExecuteNonQuery();
}
catch
{
}
//Create new table for storing the datasource
string sql = "CREATE TABLE " + tablename + " (fid INTEGER PRIMARY KEY, geom TEXT, " +
"minx REAL, miny REAL, maxx REAL, maxy REAL, oid INTEGER";
foreach (DataColumn col in columns)
if (col.DataType != typeof (String))
sql += ", " + col.ColumnName + " " + Type2SqlLiteTypeString(col.DataType);
else
sql += ", " + col.ColumnName + " TEXT";
command.CommandText = sql + ");";
//command.CommandText = sql;
command.ExecuteNonQuery();
counter++;
Collection<uint> indexes = datasource.GetObjectIDsInView(datasource.GetExtents());
//Select all indexes in shapefile, loop through each feature and insert them one-by-one
foreach (uint idx in indexes)
{
//Get feature from shapefile
FeatureDataRow feature = datasource.GetFeature(idx);
if (counter == 0)
{
//Create insert script
string strSQL = " (";
foreach (DataColumn col in feature.Table.Columns)
strSQL += "@" + col.ColumnName + ",";
strSQL += "@geom,@minx,@miny, " +
"@maxx,@maxy)";
strSQL = "INSERT INTO " + tablename + strSQL.Replace("@", "") + " VALUES" + strSQL;
command.CommandText = strSQL;
command.Parameters.Clear();
//Add datacolumn parameters
foreach (DataColumn col in feature.Table.Columns)
command.Parameters.Add("@" + col.ColumnName, Type2SqlType(col.DataType));
//Add geometry parameters
//command.Parameters.Add("@geom", DbType.Binary);
command.Parameters.Add("@minx", DbType.Double);
command.Parameters.Add("@miny", DbType.Double);
command.Parameters.Add("@maxx", DbType.Double);
command.Parameters.Add("@maxy", DbType.Double);
}
//Set values
foreach (DataColumn col in feature.Table.Columns)
//.........这里部分代码省略.........
示例4: CreateDataTable
/// <summary>
/// Creates a new table in a Microsoft SQL Server database and copies rows from an existing datasource.
/// </summary>
/// <remarks>
/// <para>The datatable created will contain six extra columns besides the attribute data: "OID" (Object ID row),
/// "WKB_Geometry" (Geometry stored as WKB), and Envelope_MinX, Envelope_MinY, Envelope_MaxX, Envelope_MaxY
/// for geometry bounding box.</para>
/// <para>
/// <example>
/// Upload a ShapeFile to a database:
/// <code>
/// public void CreateDatabase(string shapeFile)
/// {
/// if (!System.IO.File.Exists(shapeFile))
/// {
/// MessageBox.Show("File not found");
/// return;
/// }
/// ShapeFile shp = new ShapeFile(shapeFile, false);
/// //Create tablename from filename
/// string tablename = shapeFile.Substring(shapeFile.LastIndexOf('\\') + 1,
/// shapeFile.LastIndexOf('.') - shapeFile.LastIndexOf('\\') - 1);
/// //Create connectionstring
/// string connstr = @"Data Source=.\SQLEXPRESS;AttachDbFilename=|DataDirectory|GeoDatabase.mdf;Integrated Security=True;User Instance=True";
/// int count = SharpMap.Data.Providers.MsSql.CreateDataTable(shp, tablename, connstr);
/// MessageBox.Show("Uploaded " + count.ToString() + " features to datatable '" + tablename + "'");
/// }
/// </code>
/// </example>
/// </para>
/// </remarks>
/// <param name="datasource">Datasource to upload</param>
/// <param name="tablename">Name of table to create (existing table will be overwritten!)</param>
/// <param name="connstr">Connection string to database</param>
/// <returns>Number or rows inserted, -1 if failed and 0 if table created but no rows inserted.</returns>
public static int CreateDataTable(IProvider datasource, string tablename, string connstr)
{
datasource.Open();
FeatureDataRow geom = datasource.GetFeature(0);
DataColumnCollection columns = geom.Table.Columns;
int counter = -1;
using (SqlConnection conn = new SqlConnection(connstr))
{
SqlCommand command = new SqlCommand();
command.Connection = conn;
conn.Open();
//Try to drop table if it exists
try
{
command.CommandText = "DROP TABLE \"" + tablename + "\";";
command.ExecuteNonQuery();
}
catch
{
}
//Create new table for storing the datasource
string sql = "CREATE TABLE " + tablename + " (oid INTEGER IDENTITY PRIMARY KEY, WKB_Geometry Image, " +
"Envelope_MinX real, Envelope_MinY real, Envelope_MaxX real, Envelope_MaxY real";
foreach (DataColumn col in columns)
if (col.DataType != typeof (String))
sql += ", " + col.ColumnName + " " + Type2SqlType(col.DataType).ToString();
else
sql += ", " + col.ColumnName + " VARCHAR(256)";
command.CommandText = sql + ");";
command.ExecuteNonQuery();
counter++;
Collection<uint> indexes = datasource.GetObjectIDsInView(datasource.GetExtents());
//Select all indexes in shapefile, loop through each feature and insert them one-by-one
foreach (uint idx in indexes)
{
//Get feature from shapefile
FeatureDataRow feature = datasource.GetFeature(idx);
if (counter == 0)
{
//Create insert script
string strSQL = " (";
foreach (DataColumn col in feature.Table.Columns)
strSQL += "@" + col.ColumnName + ",";
strSQL += "@WKB_Geometry,@Envelope_MinX,@Envelope_MinY, " +
"@Envelope_MaxX,@Envelope_MaxY)";
strSQL = "INSERT INTO " + tablename + strSQL.Replace("@", "") + " VALUES" + strSQL;
command.CommandText = strSQL;
command.Parameters.Clear();
//Add datacolumn parameters
foreach (DataColumn col in feature.Table.Columns)
command.Parameters.Add("@" + col.ColumnName, Type2SqlType(col.DataType));
//Add geometry parameters
command.Parameters.Add("@WKB_Geometry", SqlDbType.VarBinary);
command.Parameters.Add("@Envelope_MinX", SqlDbType.Real);
command.Parameters.Add("@Envelope_MinY", SqlDbType.Real);
command.Parameters.Add("@Envelope_MaxX", SqlDbType.Real);
command.Parameters.Add("@Envelope_MaxY", SqlDbType.Real);
}
//Set values
foreach (DataColumn col in feature.Table.Columns)
command.Parameters["@" + col.ColumnName].Value = feature[col];
//.........这里部分代码省略.........
示例5: BuildFromProvider
/// <summary>
/// Builds from the given provider.
/// </summary>
/// <param name="provider">
/// The base <see cref="SharpMap.Data.Providers.IProvider"/>
/// from witch initialize the <see cref="NtsProvider"/> instance.
/// </param>
private void BuildFromProvider(IProvider provider)
{
// Features list initialization
_features = new List<Feature>(provider.GetFeatureCount());
try
{
// Load all features from the given provider
provider.Open();
Collection<uint> ids = provider.GetObjectIDsInView(provider.GetExtents());
foreach (uint id in ids)
{
var dataRow = provider.GetFeature(id);
var geometry = dataRow.Geometry;
AttributesTable attributes = new AttributesTable();
foreach (DataColumn column in dataRow.Table.Columns)
{
if (dataRow[column] == null || dataRow[column] is DBNull)
throw new ApplicationException("Null values not supported");
attributes.AddAttribute(column.ColumnName, dataRow[column]);
}
_features.Add(new Feature(geometry, attributes));
}
}
finally
{
if (provider.IsOpen)
provider.Close();
}
}