protected void btn_tree_new_Click(object sender, EventArgs e)
        {
            int pnID = PanelTree.SelectedNode.Value.ToInt32(0);
            int parentID = 0;
            try
            {
                parentID=SubTree.SelectedNode.Value.ToInt32(0);
            }
            catch
            {

            }

            SysNavTree tree = new SysNavTree();
            tree.Group = cbl_tree_group.GetValues();
            tree.Icon = ddl_tree_icon.SelectedValue;
            tree.InnerHtml = txt_tree_html.Text;
            tree.OrderIndex = txt_tree_orderindex.Text.ToInt32();
            tree.PanelID = pnID;
            tree.ParentID = parentID;
            tree.Title = txt_tree_title.Text;
            tree.Url = txt_tree_url.Text;
            DataEntities ent = new DataEntities();
            ent.AddToSysNavTree(tree);
            ent.SaveChanges();
            ent.Dispose();
            Js.AlertAndChangUrl("新增成功", "SysmenuManagement.aspx");
        }