基本思路如下：利用鼠标左键将需要调整顺序的图层移动至目标位置。

①需要涉及到TOCControl的OnMouseDown事件来获取要调整的图层，

②OnMouseUp事件获得目标图层和索引号，

③再利用IMap提供的MoveLayer方法，将相应调整axMapControl中的图层的显示顺序。

④最后使用TOCControl的Update方法来更新TOCControl控件中的显示顺序；

//全局变量public ITOCControl mTOCControl;public ILayer pMoveLayer;//需要被调整的图层；public int toIndex;//将要调整到的目标图层的索引；//窗体加载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，获得需要被调整的图层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，获得目标图层及索引//并实现axMapControl中视图显示的索引的变化，并更新TOCControl控件中的显示顺序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();}}}}