private void showFlowDirection(IFeatureClass featureclass, IUtilityNetworkGEN UtilityNetworkGEN)
{
try
{
//获取要素类的ID号
INetElements netElement = UtilityNetworkGEN as INetElements;
//获取流向
esriFlowDirection flowDirection = new ESRI.ArcGIS.Geodatabase.esriFlowDirection();
//定义当前要素的EID
int currentEID = -1;
IFeatureCursor pCursor = featureclass.Search(null, false);
IFeature pfte = pCursor.NextFeature();
while (pfte != null)
{
currentEID = netElement.GetEID(featureclass.FeatureClassID, pfte.OID, 0, esriElementType.esriETEdge);
flowDirection = UtilityNetworkGEN.GetFlowDirection(currentEID);
//绘制流向
DrawFlowDirection(pfte, Mapcontrol, flowDirection);
pfte = pCursor.NextFeature();
}
}
catch (Exception ex)
{
MessageBox.Show(ex.Message);
return;
}
}
/// <summary>
/// Gets the network element identifier for the network feature.
/// </summary>
/// <param name="source">The source.</param>
/// <param name="elementType">Type of the element.</param>
/// <returns>
/// Returns a <see cref="int" /> representing the network element identifier.
/// </returns>
public static int GetEID(this INetworkFeature source, out esriElementType elementType)
{
IGeometricNetwork geometricNetwork = source.GeometricNetwork;
INetwork network = geometricNetwork.Network;
INetElements netElements = (INetElements)network;
ISimpleJunctionFeature sjf = source as ISimpleJunctionFeature;
elementType = sjf != null ? esriElementType.esriETJunction : esriElementType.esriETEdge;
IFeature feature = (IFeature)source;
int eid = netElements.GetEID(feature.Class.ObjectClassID, feature.OID, -1, elementType);
return(eid);
}
public static StopperJunctions GetStoppersEID(NetworkContext ctx, string junctionFeatureClassAliasName)
{
StopperJunctions stoppers = null;
if (null != ctx && null != ctx.GeometricNetwork && false == string.IsNullOrEmpty(junctionFeatureClassAliasName))
{
IFeatureClass junctionFeatureClass = ctx.GetJunctionFeatureClassIdByAliasName(junctionFeatureClassAliasName);
INetElements netElements = ctx.GeometricNetwork.Network as INetElements;
if (null != junctionFeatureClass && null != netElements)
{
int ftrCnt = junctionFeatureClass.FeatureCount(null);
if (ftrCnt > 0)
{
int[] arr = new int[ftrCnt];
for (int i = 0; i < ftrCnt; ++i)
{
arr[i] = netElements.GetEID(junctionFeatureClass.FeatureClassID, i + 1, -1, esriElementType.esriETJunction);
}
stoppers = new StopperJunctions(junctionFeatureClass, arr);
}
}
}
return(stoppers);
}