[轉] AE中如何由IFeature 如何獲取所對應的FeatureClass

轉載的原文 AE中如何由IFeature 如何獲取所對應的FeatureClass

 

先獲取FeatureClass，然后遍歷Map中所有的FeatureLayer，然后比較

FeatureClass與FeatureLayer所對應的FeatureClass。

 

下面的例子中是在編輯功能里，刪除一個Feature后，所觸發的事件。目的是找到該Feature所在的FullPathName,並且輸出該對象的坐標和ID號。

 

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 += "操作的文件全路徑:" + 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 += "刪除的點的ID號：" + pFeature.OID + "，坐標：(" + a + "," + b + ")" + "\r\n";
         }
         else if (pFeature.Shape.GeometryType == esriGeometryType.esriGeometryPolygon)
         {
             textBox3.Text += "刪除的多邊形對象的ID號：" + pFeature.OID + "，坐標：";
             IPolygon pPolygon = (IPolygon)pFeature.Shape;
             int a = 0;
             int b = 0;
             //把該feature強制轉換為一個點的集合，再取點的坐標
             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 += "刪除的線對象的ID號：" + pFeature.OID + "，其坐標：";
             IPolyline pPolygon = (IPolyline)pFeature.Shape;
             int a = 0;
             int b = 0;
             //把該feature強制轉換為一個點的集合，再取點的坐標
             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);
}