private static IGeometry UnionGeometry(List <IGeometry> geoLst, ISpatialReference SpatialReference)
{
IGeometry geo = null;
using (ComReleaser comReleaser = new ComReleaser())
{
ESRI.ArcGIS.Geometry.IGeometry geometryBag = new ESRI.ArcGIS.Geometry.GeometryBagClass();
geometryBag.SpatialReference = SpatialReference;
ESRI.ArcGIS.Geometry.IGeometryCollection geometryCollection = geometryBag as ESRI.ArcGIS.Geometry.IGeometryCollection;
object missing = Type.Missing;
foreach (IGeometry item in geoLst)
{
geometryCollection.AddGeometry(item, ref missing, ref missing);
}
ITopologicalOperator unionedPolygon = new PolygonClass();
unionedPolygon.ConstructUnion(geometryBag as IEnumGeometry);
geo = unionedPolygon as IGeometry;
comReleaser.ManageLifetime(geometryBag);
comReleaser.ManageLifetime(geometryCollection);
}
return(geo);
}
private string serializeGeo(ESRI.ArcGIS.Geometry.IGeometry geo, Boolean ESRISerialize)
{
if (ESRISerialize)
{
System.String xmlNodeName = "NodeName";
System.String elementURI = "http://www.esri.com/schemas/ArcGIS/10";
// Create xml writer
ESRI.ArcGIS.esriSystem.IXMLWriter xmlWriter = new ESRI.ArcGIS.esriSystem.XMLWriterClass();
// Create xml stream
ESRI.ArcGIS.esriSystem.IXMLStream xmlStream = new ESRI.ArcGIS.esriSystem.XMLStreamClass();
// Explicit Cast for IStream and then write to stream
xmlWriter.WriteTo((ESRI.ArcGIS.esriSystem.IStream)xmlStream);
// Serialize
ESRI.ArcGIS.esriSystem.IXMLSerializer xmlSerializer = new ESRI.ArcGIS.esriSystem.XMLSerializerClass();
xmlSerializer.WriteObject(xmlWriter, null, null, xmlNodeName, elementURI, geo);
return(xmlStream.SaveToString());
}
else
{
switch (geo.GeometryType)
{
case ESRI.ArcGIS.Geometry.esriGeometryType.esriGeometryPoint:
{
ESRI.ArcGIS.Geometry.IPoint pPnt = (ESRI.ArcGIS.Geometry.IPoint)geo;
return("<Point><X>" + pPnt.X + "</X><Y>" + pPnt.Y + "</Y></Point>");
//break;
}
case ESRI.ArcGIS.Geometry.esriGeometryType.esriGeometryPolyline:
{
string lineString = "<PathArray>";
ESRI.ArcGIS.Geometry.IPolyline pPly = (ESRI.ArcGIS.Geometry.IPolyline)geo;
ESRI.ArcGIS.Geometry.IGeometryCollection pGC = (ESRI.ArcGIS.Geometry.IGeometryCollection)pPly;
for (int i = 0; i < pGC.GeometryCount; i++)
{
lineString = lineString + "<Path><PointArray>";
//ESRI.ArcGIS.Geometry.IGeometry pGeo2 = pGC.get_Geometry(i);
// ESRI.ArcGIS.Geometry.IPath pPath = (ESRI.ArcGIS.Geometry.IPath)pGC.get_Geometry(i);
ESRI.ArcGIS.Geometry.IPointCollection pPointCol = (ESRI.ArcGIS.Geometry.IPointCollection)pGC.get_Geometry(i);
for (int j = 0; j < pPointCol.PointCount; j++)
{
ESRI.ArcGIS.Geometry.IPoint pPathPoint = pPointCol.get_Point(j);
lineString = lineString + "<Point><X>" + pPathPoint.X + "</X><Y>" + pPathPoint.Y + "</Y></Point>";
}
// string tr = pGeo2.GeometryType.ToString();
lineString = lineString + "</PointArray></Path>";
}
lineString = lineString + "</PathArray>";
return(lineString);
// return "<Point><X>" + pPnt.X + "</X><Y>" + pPnt.Y + "</Y></Point>";
// break;
}
default:
{
return("");
// break;
}
}
}
}