如何在运行时从树形视图中清除更改所选节点的值 [英] how to clear change selected node value from tree view at runtime

问题描述

我用treeview列出了分支.使用会话，这些值将移动到所有其他.aspx页.当用户返回到树状视图页面时，用户将选择其他分支，同时现有会话值应与当前选定的节点值一起更改.

I used treeview to list out the branches. Using session the values are moving to all other .aspx pages. when user coming back to treeview pages, user will select other branch, at the same time existing session value should change with current selected node value.

推荐答案

尝试以下操作:
ASPX:

Try this:
ASPX:

<asp:treeview id="TreeView1" runat="server" onselectednodechanged="TreeView1_SelectedNodeChanged" showlines="True" xmlns:asp="#unknown">
    <nodes>
        <asp:treenode text="Root" value="Root">
            <asp:treenode text="RootSub1" value="RootSub1"></asp:treenode>
            <asp:treenode text="RootSub2" value="RootSub2"></asp:treenode>
        </asp:treenode>
        <asp:treenode text="Root2" value="Root2">
            <asp:treenode text="Root2Sub1" value="Root2Sub1">
                <asp:treenode text="Root2Sub1Sub1" value="Root2Sub1Sub1"></asp:treenode>
            </asp:treenode>
            <asp:treenode text="Root2Sub2" value="Root2Sub2"></asp:treenode>
        </asp:treenode>
    </nodes>
</asp:treeview>

CS:

CS:

protected void TreeView1_SelectedNodeChanged(object sender, EventArgs e)
{
    Session["YourSession"] = TreeView1.SelectedNode.Value.ToString();
    //Your other code goes here.
}

检查 TreeView.SelectedNodeChanged事件 [ ^ ]更多信息.

--Amit

Check TreeView.SelectedNodeChanged Event[^] for more information.

--Amit

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