Code behind create treeview

See more:

C#

ASP.NET

treeview

currently i use code below at the client side to create the treeview.

<asp:TreeView ID="TreeView1" runat="server">
       </asp:TreeView>

now, i plan to remove the code above and build it at code behind. i tried this code, but it doesn't work;

TreeView TreeView1 = new TreeView();

for the reference, this is my code behind:

TreeViewState state;
//TreeView TreeView1 = new TreeView();
protected void Page_Load(object sender, EventArgs e)
{
    state = new TreeViewState("TreeViewState");
    buildTree();
}

public void buildTree()
{
    //some code
}

private void TreeViewBind()
{
    if (state.IsSaved)
    {
        state.RestoreTreeView(TreeView1, "TreeViewState", HttpContext.Current);
    }
}