//Ϊ�����������ñߵ�Flag
private void BurstSetEdgeFlag(IPoint pPoint)
{
//
try
{
INetElements pNetElements = pGeoNetwork.Network as INetElements;
IPointToEID pPtToEID = new PointToEIDClass();
IPoint pNewPt;
int iUserClassID;
int iUserID;
int iUserSubID;
double dPercent;
int eid;
pPtToEID.SourceMap = axMapControl1.ActiveView.FocusMap;
pPtToEID.GeometricNetwork = pGeoNetwork;
pPtToEID.SnapTolerance = axMapControl1.ActiveView.Extent.Envelope.Width / 100;
pPtToEID.GetNearestEdge(pPoint, out eid, out pNewPt, out dPercent);
if (pNewPt == null)
{
MessageBox.Show("û�в������ٽ��ı�");
}
else
{
pNetElements.QueryIDs(eid, esriElementType.esriETEdge, out iUserClassID, out iUserID, out iUserSubID);
IMarkerSymbol pMarkerSym = new SimpleMarkerSymbolClass();
IRgbColor pRGBColor = new RgbColorClass();
pRGBColor.Red = 255;
pRGBColor.Green = 0;
pRGBColor.Blue = 0;
pMarkerSym.Color = pRGBColor;
pMarkerSym.Size = 20;
//�����µ�Flag
IEdgeFlagDisplay pEdgeFlagDisplay = new EdgeFlagDisplayClass();
IFlagDisplay pFlagDisplay = pEdgeFlagDisplay as IFlagDisplay;
pFlagDisplay.Symbol = pMarkerSym as ISymbol;
pFlagDisplay.Geometry = pNewPt;
pFlagDisplay.FeatureClassID = iUserClassID;
pFlagDisplay.FID = iUserID;
pFlagDisplay.SubID = iUserSubID;
//���Ƹõ�
IScreenDisplay pScreenDisplay = axMapControl1.ActiveView.ScreenDisplay;
pScreenDisplay.StartDrawing(pScreenDisplay.hDC, 0);
pScreenDisplay.SetSymbol(pMarkerSym as ISymbol);
pScreenDisplay.DrawPoint(pNewPt as IGeometry);
pScreenDisplay.FinishDrawing();
BurstFindValves(pFlagDisplay);
}
}
catch (Exception eX)
{
MessageBox.Show(eX.Message);
}
}
public static void UpStreamTrace(AxMapControl ppAxMapControl, IPoint pPoint, IGeometricNetwork pGeoNetwork)
{
try
{
//�����ͼ��ѡ��
ppAxMapControl.ActiveView.FocusMap.ClearSelection();
INetElements pNetElements = pGeoNetwork.Network as INetElements;
IPointToEID pPtToEID = new PointToEIDClass();
int pJunctionID = 0;
int iUserClassID;
int iUserID;
int iUserSubID;
IPoint pLocation;
pPtToEID.SourceMap = ppAxMapControl.ActiveView.FocusMap;
pPtToEID.GeometricNetwork = pGeoNetwork;
pPtToEID.SnapTolerance = ppAxMapControl.ActiveView.Extent.Envelope.Width / 100;
pPtToEID.GetNearestJunction(pPoint, out pJunctionID, out pLocation);
if (pJunctionID == 0)
{
MessageBox.Show("û�в������ٽ��ĵ�");
}
else
{
pNetElements.QueryIDs(pJunctionID, esriElementType.esriETJunction, out iUserClassID, out iUserID, out iUserSubID);
INetFlag ipNetFlag = new JunctionFlagClass();
ipNetFlag.UserClassID = iUserClassID;
ipNetFlag.UserID = iUserID;
ipNetFlag.UserSubID = iUserSubID;
IMarkerSymbol pMarkerSym = new SimpleMarkerSymbolClass();
IRgbColor pRGBColor = new RgbColorClass();
pRGBColor.Red = 255;
pRGBColor.Green = 0;
pRGBColor.Blue = 0;
pMarkerSym.Color = pRGBColor;
pMarkerSym.Size = 20;
//�����µ�Flag
IEdgeFlagDisplay pEdgeFlagDisplay = new EdgeFlagDisplayClass();
IFlagDisplay pFlagDisplay = pEdgeFlagDisplay as IFlagDisplay;
pFlagDisplay.Symbol = pMarkerSym as ISymbol;
pFlagDisplay.Geometry = pLocation;
pFlagDisplay.FeatureClassID = iUserClassID;
pFlagDisplay.FID = iUserID;
pFlagDisplay.SubID = iUserSubID;
//���Ƹõ�
IScreenDisplay pScreenDisplay = ppAxMapControl.ActiveView.ScreenDisplay;
pScreenDisplay.StartDrawing(pScreenDisplay.hDC, 0);
pScreenDisplay.SetSymbol(pMarkerSym as ISymbol);
pScreenDisplay.DrawPoint(pLocation as IGeometry);
pScreenDisplay.FinishDrawing();
//�����ٽ��
FindStreamTraceResult(ppAxMapControl, ipNetFlag, pGeoNetwork);
}
}
catch (Exception eX)
{
MessageBox.Show(eX.Message);
}
}
/// <summary>
/// Adds edge flags for a feature layer
/// </summary>
/// <param name="layer">The feature layer</param>
private void AddEdgeFlags(IFeatureLayer layer)
{
try
{
// QI all the network analysis interfaces
INetworkAnalysisExt netAnalyst = (INetworkAnalysisExt)this.UtilityNetAnalysisExt;
INetworkAnalysisExtFlags flags = (INetworkAnalysisExtFlags)this.UtilityNetAnalysisExt;
INetworkAnalysisExtBarriers barriers = (INetworkAnalysisExtBarriers)this.UtilityNetAnalysisExt;
IPointToEID point2EID = new PointToEIDClass();
point2EID.GeometricNetwork = this.NetworkAnalysisExt.CurrentNetwork;
point2EID.SourceMap = ((IMxDocument)this.Application.Document).FocusMap;
point2EID.SnapTolerance = this.SnapTolerance;
INetElements networkElements = (INetElements)this.NetworkAnalysisExt.CurrentNetwork.Network;
IFeatureSelection featureSelection = (IFeatureSelection)layer;
ISelectionSet selectionSet = (ISelectionSet)featureSelection.SelectionSet;
IEnumIDs ids = selectionSet.IDs;
int i;
while ((i = ids.Next()) > 0)
{
IFeature feature = layer.FeatureClass.GetFeature(i);
IPoint locationPoint;
int nearestEdgeID;
double perCent;
point2EID.GetNearestEdge((IPoint)feature.ShapeCopy, out nearestEdgeID, out locationPoint, out perCent);
if (networkElements.IsValidElement(nearestEdgeID, esriElementType.esriETEdge))
{
int userclassID;
int userID;
int usersubID;
networkElements.QueryIDs(nearestEdgeID, esriElementType.esriETEdge, out userclassID, out userID, out usersubID);
IFlagDisplay flagDisplay = new EdgeFlagDisplayClass();
flagDisplay.FeatureClassID = userclassID;
flagDisplay.FID = userID;
flagDisplay.SubID = usersubID;
flagDisplay.Geometry = locationPoint;
flagDisplay.Symbol = this.EdgeFlagSymbol;
flags.AddEdgeFlag((IEdgeFlagDisplay)flagDisplay);
this.AddFlagCount++;
this.OnAddFlag(locationPoint);
}
else
{
this.OnAddFlagError(layer.Name, "No nearby edge feature.", feature.OID);
}
}
}
catch (Exception ex)
{
System.Diagnostics.Trace.WriteLine(ex.StackTrace);
throw;
}
}