ASPXTreeList 如何获取某行的值？

Question

ASPXTreeList 如何获取某行的值？
新建或编辑节点时，怎样把本行的字段值取出来。谢谢，具体代码

Answer 1

<dxwtl:ASPxTreeList ID="treeList" runat="server" AutoGenerateColumns="False" 
            ClientInstanceName="treeList" Width="100%" OnCustomDataCallback="treeList_CustomDataCallback"  >
            ......                 
            <ClientSideEvents CustomDataCallback="function(s, e) {alert(e.result);}"
                               SelectionChanged ="function(s, e) { treeList.PerformCustomDataCallback(''); }"
                              />   
        </dxwtl:ASPxTreeList>protected void treeList_CustomDataCallback(object sender, TreeListCustomDataCallbackEventArgs e)
        {
            IList selectedNodeList = this.treeList.GetSelectedNodes();
            for (int i = 0; i < selectedNodeList.Count;i++ )
            {
                e.Result += ((TreeListNode)selectedNodeList[i]).Key + "," ;
            }            
        } 

Answer 2

 e.Result += ((TreeListNode)selectedNodeList[i]).Key + "," ;这句里说TreeListNode没有命名空间，没有Usejing,怎么定义

Answer 3

        TreeListNode node = treeList.FindNodeByKeyValue(key);
        e.Result = GetEntryText(node);   //设置Result的值给前台接收