我正在尝试将一个图层的所有功能与另一个图层的所有功能相交,但是在执行“ConstructUnion”功能时,我的 Web ADF 应用程序卡住了
这是我到目前为止写的代码
// create a geometrybag for layer1
ESRI.ArcGIS.Geometry.IGeometry geometryBag = new ESRI.ArcGIS.Geometry.GeometryBagClass();
geometryBag.SpatialReference = m_firstLayerFirstfeatureIGeometry.SpatialReference;
ESRI.ArcGIS.Geometry.IGeometryCollection geometryCollection = (ESRI.ArcGIS.Geometry.IGeometryCollection)geometryBag;
// Cycle all features of first layer and add them to the collection
foreach (DataRow m_dr in m_firstLayerfeatureGraphics.Rows)
{
// Takes this feature's geometry
ESRI.ArcGIS.ADF.Web.Geometry.Geometry adfFeature =
m_firstLayerfeatureGraphics.GeometryFromRow(m_dr) as ESRI.ArcGIS.ADF.Web.Geometry.Geometry;
// convert to a igeometry object
ESRI.ArcGIS.Geometry.IGeometry m_tempfeatureIGeometry =
ESRI.ArcGIS.ADF.Web.DataSources.ArcGISServer.Local.Converter.ToIGeometry(adfFeature, ctx);
System.Diagnostics.Debug.WriteLine("m_firstLayerfeatureGraphics +1 ");
object missing = Type.Missing;
geometryCollection.AddGeometry(m_tempfeatureIGeometry, ref missing, ref
missing);
}
ESRI.ArcGIS.Geometry.ITopologicalOperator mtopo1 = new ESRI.ArcGIS.Geometry.PolygonClass();
// FOLLOWING LINE BLOCKS APPLICATION
mtopo1.ConstructUnion((ESRI.ArcGIS.Geometry.IEnumGeometry)geometryBag);
知道为什么吗?