// 思路将feature加入至集合
IFeatureCursor pFeatureCursor = pFeatureLayer.Search(null, true);
IFeature pFeature = pFeatureCursor.NextFeature();
ISymbol symbol = CreateSimpleSymbol(pFeature.Shape.GeometryType);
if (pFeature != null)
{
IGeometryCollection pGeometryCollention =new PolygonClass();
object missing = Type.Missing;
while (pFeature != null)
{
// 将feature 加入至集合
pGeometryCollention.AddGeometryCollection(pFeature.Shape as IGeometryCollection);
pFeature = pFeatureCursor.NextFeature();
}
axMapControl1.FlashShape((IGeometry)pGeometryCollention, 3,150 , symbol);
}