TOCControl非常好，不用寫一行代碼就可以將整個地圖的圖層信息況顯示出來；
　　TOCControl也非常壞，提供的接口非常少，我認為有用的只有三個：HitTest,SetBuddyControl,Update，而且Update方法一執行，整個TocControl就會重新裝載一次，閃爍很厲害，實在是讓人煩。要想在TOCControl中拖動圖層，也并不容易，得動一動腦筋才行。
　　下面是我寫的一個類，用于實現拖動圖層，有需要的朋友，可以復制過去了，看一看。
　　需要說明的是，該類需要傳入一個System.Windows.Forms.Control作為移動圖層時顯示要移到的位置，所以，在TOCControl上最好上一個Panel，然后傳入到TocHelper中。另外，在計算同m_MovingLine顯示的位置時，偶沒找到什么好辦法，只好設置了一個行高的參數。在正常字體時，據我的經驗，行高是16，在Windows大字體顯示時，行高是18，可以精確的顯示。但這畢竟不是一個好辦法。哪位高人要是看到了這個帖子，也請指點小弟一二，感激不盡！


public?class?TocHelper
????{
????????private?ESRI.ArcGIS.TOCControl.AxTOCControl?m_toc;
????????private?ILayer?m_layer?=?null;
????????private?object?m_other,m_index;

????????private?LayerPopmenu?m_LyMenu?;
????????private?DataFramePopmenu?m_FrameMenu?=?new?DataFramePopmenu();

????????public?event?CurrentLayerChangedHandler?CurrentLayerChanged;

????????private?bool?m_Dragging?=?false;
????????private?System.Windows.Forms.Control?m_MovingLine;//?=?new?System.Windows.Forms.Panel();

????????public?TocHelper(ESRI.ArcGIS.TOCControl.AxTOCControl?toc)
????????{
????????????m_toc?=?toc;
????????????m_LyMenu?=?new?LayerPopmenu(this);
????????????m_LyMenu.TOCControl?=?m_toc;
????????????m_FrameMenu.TOCControl?=?m_toc;

????????????m_toc.LabelEdit?=?esriTOCControlEdit.esriTOCControlManual;
????????????/**////處理事件
????????????m_toc.OnMouseDown?+=?new?ITOCControlEvents_OnMouseDownEventHandler(m_toc_OnMouseDown);
????????????m_toc.OnMouseMove?+=?new?ITOCControlEvents_OnMouseMoveEventHandler(m_toc_OnMouseMove);
????????????m_toc.OnMouseUp?+=?new?ITOCControlEvents_OnMouseUpEventHandler(m_toc_OnMouseUp);
????????????m_toc.OnBeginLabelEdit?+=?new?ITOCControlEvents_OnBeginLabelEditEventHandler(m_toc_OnBeginLabelEdit);
????????????m_toc.OnEndLabelEdit?+=?new?ITOCControlEvents_OnEndLabelEditEventHandler(m_toc_OnEndLabelEdit);
????????}

????????public?void?SetMoveLine(System.Windows.Forms.Control?line)
????????{
????????????m_MovingLine?=?line;
????????????m_MovingLine.Size?=?new?System.Drawing.Size(100,2);
????????????m_MovingLine.BackColor?=?System.Drawing.Color.Black;
????????????m_MovingLine.Visible?=?false;
????????}

????????private?DevExpress.XtraBars.BarManager?m_pBarManager;
????????public?void?SetBarManager(DevExpress.XtraBars.BarManager?barMan)
????????{
????????????m_pBarManager?=?barMan;
????????????m_LyMenu.SetBarManager(barMan);
????????????m_FrameMenu.SetBarManager(barMan);
????????}

????????/**////?<summary>
????????///?獲取當前圖層
????????///?</summary>
????????public?ESRI.ArcGIS.Carto.ILayer?CurrentLayer
????????{
????????????get?
????????????{
????????????????return?m_layer;
????????????}????????????
????????}

????????/**////?<summary>
????????///?刷新視圖
????????///?</summary>
????????///?<param?name="layer"></param>
????????private?void?RefreshView(ILayer?layer)
????????{
????????????if?(m_toc?==?null)
????????????????return;
????????????if?(m_toc.Buddy?==?null)
????????????????return;

????????????IActiveView?pView?=?null;
????????????if?(m_toc.Buddy?is??ESRI.ArcGIS.MapControl.IMapControl2)
????????????{
????????????????pView?=?(m_toc.Buddy?as?ESRI.ArcGIS.MapControl.IMapControl2).ActiveView;
????????????}
????????????else?if?(m_toc.Buddy?is?ESRI.ArcGIS.SceneControl.ISceneControl)
????????????{
????????????????IScene?scene?=?(m_toc.Buddy?as?ESRI.ArcGIS.SceneControl.ISceneControl).Scene;
????????????????if?(scene?is?IActiveView)
????????????????????pView?=?scene?as?IActiveView;
????????????}

????????????if?(pView?!=?null)
????????????{
????????????????if?(layer?!=?null)
????????????????????pView.PartialRefresh(esriViewDrawPhase.esriViewGeography,layer,pView.Extent);
????????????????else
????????????????????pView.Refresh();
????????????
????????????}????????????????
????????}

????????private?int?m_DragStartY;
????????public?int?MouseX,MouseY;
????????private?int?m_TextHeight?=?18;
????????private?void?m_toc_OnMouseDown(object?sender,?ITOCControlEvents_OnMouseDownEvent?e)
????????{
????????????/**////選中對象????????????
????????????ITOCControl?m_TOCControl?=?(ITOCControl)?m_toc.Object;
????????????esriTOCControlItem?item?=esriTOCControlItem.esriTOCControlItemNone;
????????????ILayer?layer?=?null;
????????????IBasicMap?map?=?null;????????????
????????????m_TOCControl.HitTest(e.x,e.y,ref?item,ref?map,ref?layer,ref?m_other,ref?m_index);
????????????MouseX?=?e.x;MouseY?=e.y;
????????????m_DragStartY?=?e.y;

????????????//設置當前圖層
//????????????if?(item?==?esriTOCControlItem.esriTOCControlItemLayer)
//????????????{
????????????????if?(m_layer?!=?layer)
????????????????{
????????????????????m_layer?=?layer;
????????????????????if?(CurrentLayerChanged?!=?null)
????????????????????????CurrentLayerChanged();
????????????????}
//????????????}
//????????????else
//????????????{
//????????????????if?(m_layer?!=?null)
//????????????????{
//????????????????????m_layer?=?null;
//????????????????????if?(CurrentLayerChanged?!=?null)
//????????????????????????CurrentLayerChanged();
//????????????????}
//????????????}
????????????m_LyMenu.CurrentLayer?=?m_layer;
????????????m_FrameMenu.CurrentLayer?=?m_layer;

????????????//如果點中的圖例，則彈出符號設置窗口
????????????if?((e.button?==?1)?&&?(item?==?esriTOCControlItem.esriTOCControlItemLegendClass))?
????????????{
????????????????ILegendGroup?legendGroup;
????????????????ILegendClass?legendClass;
????????????????legendGroup?=?m_other?as?ILegendGroup;
????????????????Debug.Assert(legendGroup?!=?null);
????????????????legendClass?=?legendGroup.get_Class(Convert.ToInt32(m_index.ToString()));
????????????????Debug.Assert(legendClass?!=?null);
????????????????ISymbol?pSymbol?=?legendClass.Symbol;

??????????????? //選擇符號窗口代碼去掉了。
????????????????return;

????????????}
????????????
????????????//如果是鼠標右鍵，則彈出右鍵菜單
????????????if?(e.button?==?2)
????????????{
????????????????System.Diagnostics.Debug.Assert(m_pBarManager?!=?null);
????????????????if?((item?==?esriTOCControlItem.esriTOCControlItemLayer)?&&?(layer?!=?null))
????????????????{
????????????????????m_pBarManager.SetPopupContextMenu(m_toc,m_LyMenu.PopMenu);
????????????????}
????????????????else?if?(item?==?esriTOCControlItem.esriTOCControlItemMap)
????????????????{
????????????????????m_pBarManager.SetPopupContextMenu(m_toc,m_FrameMenu.PopMenu);
????????????????}
????????????????else
????????????????{
????????????????????m_pBarManager.SetPopupContextMenu(m_toc,null);
????????????????}
????????????????return;
????????????}

????????????
????????????//如果鼠標左鍵選中了一個圖層，則設為拖動狀態
????????????if?((e.button?==?1)?&&?(layer?!=?null))
????????????{
????????????????m_Dragging?=?true;
????????????????m_DestLayer?=?null;
????????????}

????????????
????????????m_TextHeight?=?m_toc.Parent.Font.Height+2;?
????????????
????????}

????????private?int?GetLayerIndex(IBasicMap?map,ILayer?layer,bool?DragUp)
????????{
????????????ILayer?tmpLayer;
????????????for?(int?i=0;i<=map.LayerCount-1;i++)
????????????{
????????????????tmpLayer?=?map.get_Layer(i);
????????????????if?(tmpLayer?==?layer)
????????????????{????
????????????????????if?(DragUp?==?true)
????????????????????????return?i-1;
????????????????????else
????????????????????????return?i;
????????????????}
????????????}
????????????return?0;
????????}

????????private?int?GetLayerIndex(ICompositeLayer?groupLayer,ILayer?layer,bool?DragUp)
????????{
????????????for?(int?i=0;i<=groupLayer.Count-1;i++)
????????????{
????????????????if?(groupLayer.get_Layer(i)?==?layer)
????????????????{
????????????????????if?(i?==?groupLayer.Count-1)
????????????????????????return?i;
????????????????????else
????????????????????{
????????????????????????if?(DragUp?==?true)
????????????????????????????return?i;
????????????????????????else
????????????????????????????return?i+1;
????????????????????}
????????????????????
????????????????}
????????????}
????????????return?0;
????????}

????????private?ILayer?m_DestLayer;
????????private?bool?m_DestIsMap?=?false;
????????private?bool?m_DragToCorrectPos?=?false;
????????private?void?m_toc_OnMouseMove(object?sender,?ITOCControlEvents_OnMouseMoveEvent?e)
????????{
????????????/**////如果正在拖動圖層
????????????if?(m_Dragging?==?true)
????????????{
????????????????m_DragToCorrectPos?=?false;

????????????????ITOCControl?m_TOCControl?=?(ITOCControl)?m_toc.Object;
????????????????esriTOCControlItem?item?=esriTOCControlItem.esriTOCControlItemNone;
????????????????ILayer?layer?=?null;
????????????????IBasicMap?map?=?null;
????????????????object?other?=?null;
????????????????object?index?=?null;
????????????????m_TOCControl.HitTest(e.x,e.y,ref?item,ref?map,ref?layer,ref?other,ref?index);
????????????????
????????????????m_DestIsMap?=?false;
????????????????m_DestLayer?=?layer;
????????????????if?(item?==?esriTOCControlItem.esriTOCControlItemMap)
????????????????{
????????????????????m_DestIsMap?=?true;

????????????????????int?yy;????????????????????
????????????????????yy?=?Convert.ToInt32(Math.Floor(e.y/m_TextHeight)?*?m_TextHeight)+m_TextHeight;

????????????????????m_MovingLine.Location?=?new?System.Drawing.Point(30,yy);
????????????????????m_MovingLine.Width?=?m_toc.Width?-?35;
????????????????????m_MovingLine.Visible?=?true;
????????????????????m_toc.MousePointer?=?ESRI.ArcGIS.SystemUI.esriControlsMousePointer.esriPointerDefault;????????????????????
????????????????????m_DragToCorrectPos?=?true;
????????????????????????????????
????????????????}
????????????????else?if?((item?==?esriTOCControlItem.esriTOCControlItemLayer)?&&?(layer?!=?m_layer)?&&?(layer?!=?null))
????????????????{?
????????????????????if?(m_DestLayer?is?IGroupLayer)
????????????????????{
????????????????????????m_MovingLine.Visible?=?false;
????????????????????????m_toc.MousePointer?=?ESRI.ArcGIS.SystemUI.esriControlsMousePointer.esriPointerLabel;
????????????????????????m_DragToCorrectPos?=?true;
????????????????????}
????????????????????else
????????????????????{
????????????????????????int?yy;????????????????????
????????????????????????if?(e.y?>?m_DragStartY)??//向下拖放
????????????????????????{
????????????????????????????yy?=?Convert.ToInt32(Math.Floor(e.y/m_TextHeight)?*?m_TextHeight)+m_TextHeight;
????????????????????????}
????????????????????????else??//向上拖放
????????????????????????{
????????????????????????????yy?=?Convert.ToInt32(Math.Floor(e.y/m_TextHeight)?*?m_TextHeight);????????????????????????
????????????????????????}
????????????????????????m_MovingLine.Location?=?new?System.Drawing.Point(30,yy);
????????????????????????m_MovingLine.Width?=?m_toc.Width?-?35;
????????????????????????m_MovingLine.Visible?=?true;
????????????????????????m_toc.MousePointer?=?ESRI.ArcGIS.SystemUI.esriControlsMousePointer.esriPointerDefault;????????????????????
????????????????????????m_DragToCorrectPos?=?true;
????????????????????}
????????????????}
????????????????else
????????????????{
????????????????????m_MovingLine.Visible?=?false;
????????????????????m_toc.MousePointer?=?ESRI.ArcGIS.SystemUI.esriControlsMousePointer.esriPointerDefault;
????????????????}
????????????????
????????????}
????????}

????????/**////?<summary>
????????///?取得圖層的上一級對象，可能是igrouplayer,或ibasicmap
????????///?</summary>
????????///?<param?name="map"></param>
????????///?<param?name="layer"></param>
????????///?<returns></returns>
????????private?object?GetLayerParent(IBasicMap?map,ILayer?layer)
????????{
????????????ILayer?tmpLayer;
????????????for?(int?i=0;i<=?map.LayerCount-1;i++)
????????????{
????????????????tmpLayer?=?map.get_Layer(i);
????????????????if?(tmpLayer?==?layer)
????????????????{
????????????????????return?map;
????????????????}
????????????????else?if?(tmpLayer?is?IGroupLayer)
????????????????{
????????????????????IGroupLayer?ly?=?FindParentGroupLayer(tmpLayer?as?IGroupLayer,layer);
????????????????????if?(ly?!=?null)
????????????????????????return?ly;
????????????????}
????????????}
????????????return?map;
????????}

????????private?IGroupLayer?FindParentGroupLayer(IGroupLayer?groupLayer,ILayer?layer)
????????{
????????????if?(!(groupLayer?is?ICompositeLayer))
????????????{
????????????????return?groupLayer;
????????????}

????????????ICompositeLayer?comLayer?=?groupLayer?as?ICompositeLayer;
????????????ILayer?tmpLayer;
????????????for?(int?i=0;i<=comLayer.Count-1;i++)
????????????{
????????????????tmpLayer?=?comLayer.get_Layer(i);
????????????????if?(tmpLayer?==?layer)
????????????????????return?groupLayer;
????????????????else?if?(tmpLayer?is?IGroupLayer)
????????????????????return?FindParentGroupLayer(tmpLayer?as?IGroupLayer,layer);
????????????}
????????????return?null;
????????}

????????/**////?<summary>
????????///?在grouplayer中移動圖層
????????///?</summary>
????????///?<param?name="pGroupLayer"></param>
????????///?<param?name="pLayer"></param>
????????///?<param?name="nIndex"></param>
????????private?void?MoveLayerTo(IGroupLayer?pGroupLayer,?ILayer?pLayer,?int?nIndex)
????????{

????????????ICompositeLayer?pCompositeLayer?=?pGroupLayer?as?ICompositeLayer;
//????????????if(pCompositeLayer.Count?<?2)
//????????????????return?;

????????????if(pCompositeLayer.Count-1?==?nIndex)
????????????{
????????????????pGroupLayer.Delete(pLayer);
????????????????pGroupLayer.Add(pLayer);
????????????????return;
????????????}

????????????IArray?pArray?=?new?ArrayClass();

????????????for(int?i?=?0;?i?<?pCompositeLayer.Count;?i++)
????????????{
????????????????pArray.Add(pCompositeLayer.get_Layer(i));
????????????}

????????????pGroupLayer.Clear();
????????????ILayer?pLayer1;
????????????for(int?i?=?0;?i?<?pArray.Count;?i++)
????????????{
????????????????if(pCompositeLayer.Count??==?nIndex)
????????????????{
????????????????????pGroupLayer.Add(pLayer);
????????????????}

????????????????pLayer1??=?pArray.get_Element(i)?as?ILayer;
????????????????if(pLayer1?==?pLayer)
????????????????{
????????????????????continue;
????????????????}
????????????????pGroupLayer.Add(pLayer1);

????????????}????????????
????????}

????????private?void?m_toc_OnMouseUp(object?sender,?ITOCControlEvents_OnMouseUpEvent?e)
????????{
????????????if?(m_Dragging?==?true)
????????????{
????????????????check?dragging?conditions#region?check?dragging?conditions
????????????????m_Dragging?=?false;
????????????????m_toc.MousePointer?=?ESRI.ArcGIS.SystemUI.esriControlsMousePointer.esriPointerDefault;
????????????????if?(m_toc?==?null)
????????????????????return?;
????????????????if?(m_toc.Buddy?==?null)
????????????????????return?;
????????????????if?(m_DragToCorrectPos?==?false)
????????????????????return;
????????????????m_DragToCorrectPos?=?false;
????????????????m_MovingLine.Visible?=?false;

????????????????IMap?map=null;
????????????????IScene?scene=null;
????????????????if?(m_toc.Buddy?is?IMapControl2)
????????????????{
????????????????????map?=?(m_toc.Buddy?as?IMapControl2).Map;
????????????????}
????????????????else?if?(m_toc.Buddy?is?ESRI.ArcGIS.SceneControl.ISceneControl)
????????????????{
????????????????????scene?=?(m_toc.Buddy?as?ESRI.ArcGIS.SceneControl.ISceneControl).Scene;
????????????????}
????????????????else
????????????????{
????????????????????return;
????????????????}

????????????????IBasicMap?bmap;
????????????????if?(map?!=?null)
????????????????????bmap?=?map?as?IBasicMap;
????????????????else?
????????????????????bmap?=?scene?as?IBasicMap;
????????????????if?(bmap.LayerCount?==0)
????????????????????return;

????????????????#endregion

????????????????bool?destIgnoreGroupLayer?=?false;
????????????????if?(m_DestIsMap?==?true)
????????????????{
????????????????????m_DestLayer?=?bmap.get_Layer(0);
????????????????????destIgnoreGroupLayer?=?true;
????????????????}

????????????????if?(m_DestLayer?==?null)
????????????????????return;
????????????????if?(m_layer?==?m_DestLayer)
????????????????????return;

????????????????bool?DragUp;??//是否正向上拖放
????????????????DragUp?=?(e.y?<?m_DragStartY);
????????????????int?destIndex;

????????????????object?buddy?=?m_toc.Buddy;
????????????????m_toc.SetBuddyControl(null);

????????????????try
????????????????{
????????????????????object?srcGroupLayer?=?GetLayerParent(bmap,m_layer);
????????????????????object?destGroupLayer?=?GetLayerParent(bmap,m_DestLayer);????????????????
????????????????
????????????????????//先刪除源圖層
????????????????????if?(srcGroupLayer?is?GroupLayer)
????????????????????????(srcGroupLayer?as?IGroupLayer).Delete(m_layer);
????????????????????else
????????????????????????bmap.DeleteLayer(m_layer);

????????????????????//再加入，并移到合適位置
????????????????????if?((m_DestLayer?is?IGroupLayer)?&&?(destIgnoreGroupLayer?==?false))
????????????????????{
????????????????????????(m_DestLayer?as?IGroupLayer).Add(m_layer);
????????????????????????destIndex?=?GetLayerIndex(m_DestLayer?as?ICompositeLayer,m_layer,DragUp);????????????????????
????????????????????
????????????????????????MoveLayerTo(m_DestLayer?as?IGroupLayer,m_layer,destIndex);
????????????????????????RefreshView(m_DestLayer);????????????????????????????????????????
????????????????????}
????????????????????else?if?(destGroupLayer?is?IGroupLayer)
????????????????????{????????????????????
????????????????????????(destGroupLayer?as?IGroupLayer).Add(m_layer);
????????????????????????destIndex?=?GetLayerIndex(destGroupLayer?as?ICompositeLayer,m_DestLayer,DragUp);????????????????????
????????????????????????????????????????
????????????????????????MoveLayerTo(destGroupLayer?as?IGroupLayer,m_layer,destIndex);????
????????????????????????RefreshView(destGroupLayer?as?ILayer);
????????????????????}
????????????????????else
????????????????????{
????????????????????????bmap.AddLayer(m_layer);
????????????????????????destIndex?=?GetLayerIndex(bmap,m_DestLayer,DragUp);
????????????????????????????????????????????
????????????????????????if?(bmap?is?IMap)
????????????????????????????(bmap?as?IMap).MoveLayer(m_layer,destIndex);
????????????????????????else?if?(bmap?is?IScene)
????????????????????????????(bmap?as?IScene).MoveLayer(m_layer,destIndex);????????????????????
????????????????????}????
????
????????????????}
????????????????finally
????????????????{
????????????????????m_toc.SetBuddyControl(buddy);??//重新綁定，并刷新toc
????????????????}

????????????}
????????}

????????private?void?m_toc_OnBeginLabelEdit(object?sender,?ITOCControlEvents_OnBeginLabelEditEvent?e)
????????{
????????????e.canEdit?=?false;
????????}

????????private?void?m_toc_OnEndLabelEdit(object?sender,?ITOCControlEvents_OnEndLabelEditEvent?e)
????????{
????????}

????}

轉載于:https://www.cnblogs.com/watsonyin/archive/2006/09/14/504100.html

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