private void FlowDiretionBtn_Click(object sender, EventArgs e)
{
if (m_GeometryNetwork == null)
{
return;
}
INetwork network = m_GeometryNetwork.Network;
//获取描述网络流向的接口
IUtilityNetworkGEN utilityNetworkGEN = network as IUtilityNetworkGEN;
//获取线要素类
//建立线要素类字典
Dictionary <IFeatureClass, string> dic = new Dictionary <IFeatureClass, string>();
for (int i = 0; i < this.Mapcontrol.LayerCount; i++)
{
IFeatureLayer Lyr = this.Mapcontrol.get_Layer(i) as IFeatureLayer;
if (Lyr == null)
{
continue;
}
if (Lyr.FeatureClass.ShapeType == esriGeometryType.esriGeometryPolyline)
{
if (!dic.ContainsValue(Lyr.FeatureClass.AliasName))
{
dic.Add(Lyr.FeatureClass, Lyr.FeatureClass.AliasName);
}
}
}
//遍历字典
foreach (KeyValuePair <IFeatureClass, string> key in dic)
{
showFlowDirection(key.Key, utilityNetworkGEN);
}
this.Mapcontrol.ActiveView.PartialRefresh(esriViewDrawPhase.esriViewGraphics, null, this.Mapcontrol.FullExtent);
}
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;
}
}
