private Dictionary <IPoint, int> _ExtractUpstreamPipeEnds()
{
int iInletClassID = _inletClass.FeatureClassID;
INetwork network = _geometricNetwork.Network;
INetElements netElements = network as INetElements;
INetTopology netTopology = network as INetTopology;
Dictionary <IPoint, int> endPoints = new Dictionary <IPoint, int>();
IEnumNetEID netEnum = network.CreateNetBrowser(esriElementType.esriETJunction);
int junctionCount = netEnum.Count;
int classId, userId, subId, edgeId;
bool towardJunction;
int junctionId = -1;
for (int j = 0; j < junctionCount; j++)
{
junctionId = netEnum.Next();
netElements.QueryIDs(junctionId, esriElementType.esriETJunction, out classId, out userId, out subId);
if (classId != iInletClassID)
{
bool disabled = false;
if (_excludeDisabled)
{
disabled = _IsDisabled(junctionId, esriElementType.esriETJunction, netElements);
}
if (!(_excludeDisabled && disabled))
{
int edgeCount = netTopology.GetAdjacentEdgeCount(junctionId);
bool isUpstreamEnd = edgeCount > 0; // initializing only (zero edge count always excluded)
for (int e = 0; e < edgeCount; e++)
{
netTopology.GetAdjacentEdge(junctionId, e, out edgeId, out towardJunction);
if (towardJunction)
{
isUpstreamEnd = false;
break;
}
}
if (isUpstreamEnd)
{
endPoints.Add(_geometricNetwork.get_GeometryForJunctionEID(junctionId) as IPoint, junctionId);
}
}
}
}
return(endPoints);
}