TreeView中选中+号的文字后折叠或展开子节点

前台：

<asp:TreeView
ID="TreeView1" 
runat="server" Font-Names="宋体"
Font-Size="14px"
CollapseImageUrl="~/images/LI.GIF"
ExpandDepth="0" ExpandImageUrl="~/images/LI.GIF"
NoExpandImageUrl="~/images/LI.GIF"
Width="160px"
OnSelectedNodeChanged="TreeView1_SelectedNodeChanged">
            <HoverNodeStyle
Font-Size="13px"
/>
            <LeafNodeStyle
Font-Size="13px"
/>
            <NodeStyle
BorderStyle="None"
HorizontalPadding="7px"
NodeSpacing="5px"
VerticalPadding="5px"
/>
        </asp:TreeView>

 

 

代码：（提示：TreeView1是TreeView控件的id；tabC.GetTabsByParentId(67)为根节点的信息，返回值是ArrayList类型；TabInfo中包含根节点的text（info.TabName）和value（info.TabID）的值；）。

 

protected
void Page_Load(System.Object sender, System.EventArgse)       {       

if (!Page.IsPostBack)
        {
           Binder2();   
        }
}
///<summary>
        ///绑定树
        ///</summary>
        publicvoid Binder2()
        {
            TreeView1.Nodes.Clear();
 
            TreeNodenode;
 
            foreach(TabInfo info
intabC.GetTabsByParentId(67))
            {
               
                node = new
TreeNode(info.TabName,info.TabID.ToString());
                node.Expand();
               
                this.TreeView1.Nodes.Add(node);
               BinderChildNodes2(node, info.TabID);
                if(node.ChildNodes.Count > 0)
                   node.SelectAction =
TreeNodeSelectAction.Expand;
            }
        }
        ///<summary>
        ///绑定叶子子节点
        ///</summary>
        ///<paramname="node"></param>
        ///<param name="ParentID"></param>
        privatevoid BinderChildNodes2(TreeNodenode,
int ParentID)
        {
            TreeNoden;
            foreach(TabInfo Info
intabC.GetTabsByParentId(ParentID))
            {
                n = new
TreeNode(Info.TabName,Info.TabID.ToString());
                //BinderChildNodes2(n, Info.TabID);
                //n.Expand();
                n.SelectAction = TreeNodeSelectAction.Select;
               node.ChildNodes.Add(n);
            }
        }