获得TOCControl中的选中图层

问题：

获得TOCControl中的选中图层，并对其判断如果是组图层则进行添加操作。

解决方法：

使用TOCControl.GetSelectedItem（）方法。

示例代码：

 1             esriTOCControlItem tocChoosedItem = esriTOCControlItem.esriTOCControlItemNone;
 2             IBasicMap pBasicMap = null;
 3             ILayer tocChoosedLyr = null;
 4             object pOther = new object();
 5             object pIndex = new object();
 6             m_Application.TOCControl.GetSelectedItem(ref tocChoosedItem, ref pBasicMap, ref tocChoosedLyr, ref pOther, ref  pIndex); 
 7            
 8             if (tocChoosedLyr is IGroupLayer)
 9             {
10                 ICompositeLayer compositeLyr = tocChoosedLyr as ICompositeLayer;
11                 int childLyrCount = compositeLyr.Count;
12                 for (int j = 0; j < childLyrCount; j++)
13                 {
14                     ILayer childLyr = compositeLyr.get_Layer(j);
15                     object[] objs = new object[] { childLyr.Name, true };
16                     dataGridView1.Rows.Add(objs);
17                 }
18             }