private static IGeometry get_GraphicShape(IEnumElement theElements, int a_Dimensionality, bool multipart, ref IElementCollection elemCollection)
{
IGeometry theReturn = null;
IGeometryCollection theGeomColl = null;
object missing = Type.Missing;
try
{
elemCollection.Clear();
if (theElements != null)
{
theElements.Reset();
IElement theElement = theElements.Next();
while (theElement != null)
{
if (theGeomColl == null)
theGeomColl = new GeometryBagClass();
IGeometry theShape = null;
if (theElement is IGroupElement)
{
theShape = get_GraphicShape(((IGroupElement)theElement).Elements, a_Dimensionality, multipart,ref elemCollection);
}
else if (theElement is ICircleElement
|| theElement is IPolygonElement
|| theElement is IRectangleElement
|| theElement is IEllipseElement
|| theElement is ILineElement
|| theElement is IMarkerElement)
theShape = theElement.Geometry;
if (theShape != null)
theGeomColl.AddGeometry(theShape, ref missing, ref missing);
elemCollection.Add(theElement,-1);
theElement = theElements.Next();
}
}
if (theGeomColl != null && theGeomColl.GeometryCount > 0)
{
ITopologicalOperator theTopoOp = null;
switch (a_Dimensionality)
{
case 0:
if (multipart)
{
theTopoOp = new MultipointClass();
theTopoOp.ConstructUnion((IEnumGeometry)theGeomColl);
}
else
theTopoOp = theGeomColl.get_Geometry(0) as ITopologicalOperator;
break;
case 1:
theTopoOp = new PolylineClass();
theTopoOp.ConstructUnion((IEnumGeometry)theGeomColl);
break;
case 2:
theTopoOp = new PolygonClass();
theTopoOp.ConstructUnion((IEnumGeometry)theGeomColl);
break;
}
theReturn = theTopoOp as IGeometry;
}
}
catch(Exception ex)
{
util.Logger.Write(" Descrip : Finding elements with a specific dimensionality. " +
"\n Message : " + ex.Message +
"\n StackTrc : " + ex.StackTrace,util.Logger.LogLevel.Debug);
}
return theReturn;
}
public static IGeometry get_GraphicShape(IEnumElement theElements, int a_Dimensionality, bool multipart)
{
IGeometry theReturn = null;
IGeometryCollection theGeomColl = null;
object missing = Type.Missing;
if (theElements != null)
{
theElements.Reset();
IElement theElement = theElements.Next();
while (theElement != null)
{
if (theGeomColl == null)
theGeomColl = new GeometryBagClass();
IGeometry theShape = null;
if (theElement is IGroupElement)
{
theShape = get_GraphicShape(((IGroupElement)theElement).Elements, a_Dimensionality, multipart);
}
else if (theElement is ICircleElement
|| theElement is IPolygonElement
|| theElement is IRectangleElement
|| theElement is IEllipseElement
|| theElement is ILineElement
|| theElement is IMarkerElement)
theShape = theElement.Geometry;
if (theShape != null)
theGeomColl.AddGeometry(theShape, ref missing, ref missing);
theElement = theElements.Next();
}
}
if (theGeomColl != null && theGeomColl.GeometryCount > 0)
{
ITopologicalOperator theTopoOp = null;
switch (a_Dimensionality)
{
case 0:
if (multipart)
{
theTopoOp = new MultipointClass();
theTopoOp.ConstructUnion((IEnumGeometry)theGeomColl);
}
else
theTopoOp = theGeomColl.get_Geometry(0) as ITopologicalOperator;
break;
case 1:
theTopoOp = new PolylineClass();
theTopoOp.ConstructUnion((IEnumGeometry)theGeomColl);
break;
case 2:
theTopoOp = new PolygonClass();
theTopoOp.ConstructUnion((IEnumGeometry)theGeomColl);
break;
}
theReturn = theTopoOp as IGeometry;
}
return theReturn;
}
public IGeometry GetSpatialFilter()
{
IGeometry geom = null;
IFeature feature;
IFeatureCursor featCursor = null;
IQueryFilter queryFilter = new QueryFilter();
queryFilter.WhereClause = tbQuery.Text; //set query clause
//query
DataOperator dataOperator = new DataOperator(m_map);
IFeatureLayer featureLayer = (IFeatureLayer)dataOperator.GetLayerByName(cbLayerName.Text);
try
{
//get feature cursor
featCursor = (IFeatureCursor)featureLayer.FeatureClass.Search(queryFilter, false);
}
catch
{
MessageBox.Show("Invalid query!");
return(null);
}
feature = featCursor.NextFeature();
IFeatureClass featureClass = feature.Class as IFeatureClass;
//combine the geometries
int count = 0;
IGeometryCollection geometries = new GeometryBagClass();
object missing = Type.Missing;
while (feature != null)
{
geom = feature.ShapeCopy;
geometries.AddGeometry(geom, ref missing, ref missing);
feature = featCursor.NextFeature();
count++;
}
//combine the geometries
if (count > 1)
{
ITopologicalOperator unionedGeometry = null;
switch (featureClass.ShapeType)
{
case esriGeometryType.esriGeometryMultipoint:
unionedGeometry = new MultipointClass(); break;
case esriGeometryType.esriGeometryPolyline:
unionedGeometry = new PolylineClass(); break;
case esriGeometryType.esriGeometryPolygon:
unionedGeometry = new PolygonClass(); break;
case esriGeometryType.esriGeometryPoint:
unionedGeometry = new MultipointClass(); break;
default: break;
}
unionedGeometry.ConstructUnion(geometries as IEnumGeometry);
geom = unionedGeometry as IGeometry;
}
//get buffer
if (cbMethod.Text == "Are within a distance of")
{
ITopologicalOperator ipTO = (ITopologicalOperator)geom;
IGeometry iGeomBuffer = ipTO.Buffer(int.Parse(tbSearchDistance.Text));
geom = iGeomBuffer;
}
return(geom);
}
