[转] AE中如何由IFeature 如何获取所对应的FeatureClass

转载的原文 AE中如何由IFeature 如何获取所对应的FeatureClass

 

先获取FeatureClass，然后遍历Map中所有的FeatureLayer，然后比较

FeatureClass与FeatureLayer所对应的FeatureClass。

 

下面的例子中是在编辑功能里，删除一个Feature后，所触发的事件。目的是找到该Feature所在的FullPathName,并且输出该对象的坐标和ID号。

 

private void OnDeleteFeatureMethod(object o)
{
　　IFeature pFeature = o as IFeature;
　　IFeatureClass pFeatureClass = pFeature.Class as IFeatureClass;
　　for (int i = 0; i < axMapControl1.Map.LayerCount;i++ )
　　{
            IFeatureLayer iFeatureLayer = axMapControl1.get_Layer(i) as IFeatureLayer;
            IFeatureClass iFeatureCla = iFeatureLayer.FeatureClass;

                if (iFeatureCla == pFeatureClass)
                {
                    IWorkspace pWorkSpace = m_EngineEditor.EditWorkspace;
                    textBox3.Text += "操作的文件全路径:" + pWorkSpace.PathName + "\\" +       axMapControl1.get_Layer(i).Name + ".shp " + "\r\n";
                    break;
                }
        }

         if (pFeature.Shape.GeometryType == esriGeometryType.esriGeometryPoint)
         {
             IGeometry iGe = pFeature.Shape;
             IPoint ipo = new PointClass();
             ipo = iGe as IPoint;
             int a = 0;
             int b = 0;
             axMapControl1.FromMapPoint(ipo, ref a, ref   b);
             textBox3.Text += "删除的点的ID号：" + pFeature.OID + "，坐标：(" + a + "," + b + ")" + "\r\n";
         }
         else if (pFeature.Shape.GeometryType == esriGeometryType.esriGeometryPolygon)
         {
             textBox3.Text += "删除的多边形对象的ID号：" + pFeature.OID + "，坐标：";
             IPolygon pPolygon = (IPolygon)pFeature.Shape;
             int a = 0;
             int b = 0;
             //把该feature强制转换为一个点的集合，再取点的坐标
             IPointCollection pPointCollection = pPolygon as IPointCollection;
             for (int i = 0; i < pPointCollection.PointCount - 1; i++)
             {
                 IPoint ipo = pPointCollection.get_Point(i);
                 axMapControl1.FromMapPoint(ipo, ref a, ref   b);
                 textBox3.Text += "(" + a + "," + b + ")" + "\t";
             }
             textBox3.Text += "\r\n";
         }

         else if (pFeature.Shape.GeometryType == esriGeometryType.esriGeometryPolyline)
         {
             textBox3.Text += "删除的线对象的ID号：" + pFeature.OID + "，其坐标：";
             IPolyline pPolygon = (IPolyline)pFeature.Shape;
             int a = 0;
             int b = 0;
             //把该feature强制转换为一个点的集合，再取点的坐标
             IPointCollection pPointCollection = pPolygon as IPointCollection;
             for (int i = 0; i < pPointCollection.PointCount; i++)
             {
                 IPoint ipo = pPointCollection.get_Point(i);
                 axMapControl1.FromMapPoint(ipo, ref a, ref   b);
                 textBox3.Text += "(" + a + "," + b + ")" + "\t";
             }
             textBox3.Text += "\r\n";
　　}
　　axMapControl1.ActiveView.PartialRefresh(esriViewDrawPhase.esriViewGeography, null, null);
}