. net 的TreeView控件， 点击节点时展开其下一个子层，怎么实现，

. net  的TreeView控件， 点击节点时展开其下一个子层，怎么实现，

解决方案 »

  1.   

    <%@ Page Language="C#" %><!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"><script runat="server">    protected void TreeView1_SelectedNodeChanged(object sender, EventArgs e)
        {
            if (this.TreeView1.SelectedNode.ChildNodes.Count > 0)
            {
                this.TreeView1.SelectedNode.Expand(); 
            }
        }</script><html xmlns="http://www.w3.org/1999/xhtml">
    <head id="Head1" runat="server">
        <title></title>
    </head>
    <body>
        <form id="form1" runat="server">
            <div>
                <asp:TreeView ID="TreeView1" runat="server" ShowLines="false" ExpandDepth="0" OnSelectedNodeChanged="TreeView1_SelectedNodeChanged">
                    <Nodes>
                        <asp:TreeNode Text="0" Value="0">
                            <asp:TreeNode Text="1" Value="1"></asp:TreeNode>
                            <asp:TreeNode Text="2" Value="2"></asp:TreeNode>
                            <asp:TreeNode Text="3" Value="3"></asp:TreeNode>
                        </asp:TreeNode>
                        <asp:TreeNode Text="10" Value="10">
                            <asp:TreeNode Text="11" Value="11"></asp:TreeNode>
                            <asp:TreeNode Text="12" Value="12"></asp:TreeNode>
                            <asp:TreeNode Text="13" Value="13"></asp:TreeNode>
                        </asp:TreeNode>
                    </Nodes>
                </asp:TreeView>
            </div>
        </form>
    </body>
    </html>