loading}
finally
{
try{
ystem.Runtime.InteropServices.Marshal.ReleaseComObject(oField);
System.Runtime.InteropServices.Marshal.ReleaseComObject(oFields);
System.Runtime.InteropServices.Marshal.ReleaseComObject(oFieldsEdit);
System.Runtime.InteropServices.Marshal.ReleaseComObject(oFieldEdit);
System.Runtime.InteropServices.Marshal.ReleaseComObject(pName);
System.Runtime.InteropServices.Marshal.ReleaseComObject(pWSF);
System.Runtime.InteropServices.Marshal.ReleaseComObject(pWSName);
System.Runtime.InteropServices.Marshal.ReleaseComObject(pMemoryWS);
System.Runtime.InteropServices.Marshal.ReleaseComObject(oFeatureClass);
}
catch
{
}
GC.Collect();
}
return oFeatureLayer;
}
catch (Exception Err)
{
MessageBox.Show(Err.Message, \提示\
return null;}
}
CODE:
///
///
///
///
public void AddTransTempEle(AxMapControl pMapCtrl, IGeometry pGeo, bool bAutoClear)
{
try
{
if (pMapCtrl == null) return;
if (pGeo == null) return;
if (pGeo.IsEmpty) return;
IGeometry pPolygon = null;
if (pGeo is IEnvelope)
{
object Miss = Type.Missing;
pPolygon = new PolygonClass();
IGeometryCollection pGeoColl = pPolygon as IGeometryCollection;
pGeoColl.AddGeometry(pGeo, ref Miss, ref Miss);
}
else if (pGeo is IPolygon)
{
(pGeo as ITopologicalOperator).Simplify();
pPolygon = pGeo;
}
else
{
MessageBox.Show( \几何实体类型不匹配\提示\
return;
}
//获取透明要素层
IFeatureLayer pFlyr = null;
for (int i = 0; i < pMapCtrl.LayerCount; i++)
{
if (pMapCtrl.get_Layer(i).Name == \
{
pFlyr = pMapCtrl.get_Layer(i) as IFeatureLayer;
break;
}
}
//透明临时层不存在需要创建
if (pFlyr == null)
{
pFlyr = AddFeatureLayerByMemoryWS(pMapCtrl,pMapCtrl.SpatialReference);
if (pFlyr == null)
{
MessageBox.Show(\创建透明临时图层发生异常\提示\
MessageBoxIcon.Information);
return;
}
}
IFeatureClass pFC = pFlyr.FeatureClass;
if (bAutoClear)
{
if (pFC.FeatureCount(null) > 0)
{
IFeatureCursor pFCursor = pFC.Search(null, false);
if (pFCursor != null)
{
IFeature pFeature = pFCursor.NextFeature();
if (pFeature != null)
{
while (pFeature != null)
{
pFeature.Delete();
pFeature = pFCursor.NextFeature();
}
}
System.Runtime.InteropServices.Marshal.ReleaseComObject(pFCursor);
}
}
}