TreeView中选中+号的文字后折叠或展开子节点

前台：

<asp:TreeViewID="TreeView1"runat="server"Font-Names="宋体"Font-Size="14px"CollapseImageUrl="~/p_w_picpaths/LI.GIF"ExpandDepth="0"ExpandImageUrl="~/p_w_picpaths/LI.GIF"NoExpandImageUrl="~/p_w_picpaths/LI.GIF"Width="160px"OnSelectedNodeChanged="TreeView1_SelectedNodeChanged">

<HoverNodeStyleFont-Size="13px"/>

<LeafNodeStyleFont-Size="13px"/>

<NodeStyleBorderStyle="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；）。

protectedvoid 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 = newTreeNode(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 = newTreeNode(Info.TabName,Info.TabID.ToString());

//BinderChildNodes2(n, Info.TabID);

//n.Expand();

n.SelectAction = TreeNodeSelectAction.Select;

node.ChildNodes.Add(n);

}

}