C#+AE 調整TOCControl控件中圖層的顯示順序

基本思路如下：利用鼠標左鍵將需要調整順序的圖層移動至目標位置。

①需要涉及到TOCControl的OnMouseDown事件來獲取要調整的圖層，

②OnMouseUp事件獲得目標圖層和索引號，

③再利用IMap提供的MoveLayer方法，將相應調整axMapControl中的圖層的顯示順序。

④最后使用TOCControl的Update方法來更新TOCControl控件中的顯示順序；

 

具體實現代碼如下：

//全局變量
        public ITOCControl mTOCControl;
        public ILayer pMoveLayer;//需要被調整的圖層；
        public int toIndex;//將要調整到的目標圖層的索引；

//窗體加載

private void Form1_Load(object sender, EventArgs e)
        {
         
            this.axTOCControl1.SetBuddyControl(this.axMapControl1);
           mTOCControl=this.axTOCControl1.Object as ITOCControl;
        }

 

//TOCControl控件的OnMouseDown事件，獲得需要被調整的圖層

 private void axTOCControl1_OnMouseDown(object sender, ITOCControlEvents_OnMouseDownEvent e)
        {
            esriTOCControlItem item=esriTOCControlItem.esriTOCControlItemNone;
            if (e.button == 1)
            {
                IBasicMap map = null;
                ILayer layer = null;
                object other = null;
                object index = null;

                mTOCControl.HitTest(e.x, e.y, ref item, ref map, ref layer, ref other, ref index);
                if (item == esriTOCControlItem.esriTOCControlItemLayer)
                {
                    if(layer is IAnnotationSublayer)
                    {
                        return;
                    }
                    else
                    {
                        pMoveLayer = layer;
                    }
                }
               
            }
        }

//TOCControl控件的OnMouseUp事件，獲得目標圖層及索引

//並實現axMapControl中視圖顯示的索引的變化，並更新TOCControl控件中的顯示順序

private void axTOCControl1_OnMouseUp(object sender, ITOCControlEvents_OnMouseUpEvent e)
        {
            if (e.button == 1)
            {
                esriTOCControlItem item = esriTOCControlItem.esriTOCControlItemNone;
                IBasicMap map = null;
                ILayer layer = null;
                object other = null;
                object index = null;

                mTOCControl.HitTest(e.x, e.y, ref item, ref map, ref layer, ref other, ref index);
                IMap pMap = this.axMapControl1.ActiveView.FocusMap;
                if(item==esriTOCControlItem.esriTOCControlItemLayer||layer!=null)
                {
                    if (pMoveLayer != null)
                    {
                        ILayer pTempLayer;
                        for (int i = 0; i < pMap.LayerCount; i++)
                        {
                            pTempLayer = pMap.get_Layer(i);
                            if (pTempLayer == layer)
                            {
                                toIndex = i;
                            }
                        }
                        pMap.MoveLayer(pMoveLayer,toIndex);
                        axMapControl1.ActiveView.Refresh();
                        mTOCControl.Update();
                    }
                }
            }
        }