I wondered if anyone else has had strange behavior when specifying the SelectedNodeChanged event of a TreeView as an AsyncPostBackTrigger for an UpdatePanel. I'm currently seeing erratic behavior. Some nodes will post back when selected, and others won't; it seems totally random.
There was no problem before I upgraded fromRelease 60914 of the toolkit.
I have Treeview inside asp:UpdatePanel.{ASP.NET Ajax RC version}
Its not maintaining its viewstate properly while expanding/collepsing nodes.
If I remove Updatepanel,, it works fine.
Is it a bug ?? what could be relevent and reliable solution.
Thanks in advance.
Rahul Jain
KY
This is still the wrong forum for this question, but I'll answer anyway: TreeView is not supported inside an UpdatePanel. Seehttp://ajax.asp.net/docs/overview/UpdatePanelOverview.aspx.
If you have a TreeView inside an UpdatePanel, it is better to have the following properties set as such PopulateNodesFromClient="false" and EnableClientScript="false". Hope this will solve at least some random problems when clicking/expanding/collapsing a treenode.
Cheers,
vince.n3t
Hello,
I tried a few things in my code & everything started working fine. But I get an error on the IE7 page (error: Invalid argument, Line: 43, Character:238).
On putting a break point & then debugging, I get a break on the JS page & the error points to --> accordion.insertBefore(wrapper, content)
I have no idea what this error means & how to debug it. Because everything on the IE7 page works as I want it to, but I get this error on the status bar as: 'Done, but with errors on page'.
Please help me with this error, as this a project I am working on & I need to complete it before the deadline. Any other options for creating a TreeView using any of the Ajax Extenders with the Update Panel are also welcome.
MyDefault.aspx :
<%@. Page Language="C#" AutoEventWireup="true" CodeBehind="Default.aspx.cs" Inherits="AJAXRajeev.Default" %>
<%@. Register Assembly="AjaxControlToolkit" Namespace="AjaxControlToolkit" TagPrefix="ajaxToolkit" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" >
<head id="Head1" runat="server">
<title>
Sales Professional Desktop II
</title>
</head>
<body>
<form id="form1" method="post" runat="server">
<div class="Default" style="float:left">
<asp:ScriptManager ID="ScriptManager1" runat="server" EnablePageMethods="true" EnablePartialRendering="true">
<Services>
<asp:ServiceReference Path="WebService.asmx" />
</Services>
</asp:ScriptManager>
<asp:UpdatePanel ID="UpdatePanel2" runat="server">
<ContentTemplate>
<div id="MyAccordion" runat="server">
<ajaxToolkit:Accordion ID="Accordion1" runat="server" SelectedIndex="0">
<Panes>
<ajaxToolkit:AccordionPane ID="AccordionPane1" runat="server">
<Header><a href="http://links.10026.com/?link=" onclick="return false;" class="accordionlink" />
External Documents
</Header>
<Content>
<asp:UpdatePanel ID="UpdatePanel1" runat="server">
<ContentTemplate>
<asp:Panel ID="navPanel" runat="server" ScrollBars="auto">
<asp:TreeView ID="TreeView1" runat="server" BackColor="Transparent" ExpandDepth="1" MaxDataBindDepth="2" NodeIndent="10" SkipLinkText="skip nav" Target="~/Default.aspx" ToolTip="navigation" Font-Names="Verdana" Font-Size="Smaller" ForeColor="Gray" ShowLines="True" PopulateNodesFromClient="true" EnableClientScript="True">
<ParentNodeStyle Font-Bold="False" ImageUrl="~/Images/folder.gif" />
<HoverNodeStyle Font-Underline="True" />
<SelectedNodeStyle Font-Underline="True" HorizontalPadding="0px" VerticalPadding="0px" ImageUrl="~/Images/folder_open.gif" />
<RootNodeStyle ImageUrl="~/Images/folder.gif" />
<NodeStyle Font-Names="Verdana" Font-Size="8pt" ForeColor="Black" HorizontalPadding="5px" NodeSpacing="0px" VerticalPadding="0px" ImageUrl="~/Images/folder_open.gif" />
</asp:TreeView>
</asp:Panel>
</ContentTemplate>
</asp:UpdatePanel>
<asp:UpdateProgress ID="UpdateProgress1" runat="server">
<ProgressTemplate>
External Documents
</ProgressTemplate>
</asp:UpdateProgress>
</Content>
</ajaxToolkit:AccordionPane>
</Panes>
</ajaxToolkit:Accordion>
</div>
</ContentTemplate>
</asp:UpdatePanel>
<asp:UpdateProgress ID="UpdateProgress2" runat="server">
<ProgressTemplate>
External Documents
</ProgressTemplate>
</asp:UpdateProgress>
</div>
</form>
</body>
</html>
MyDefault.aspx.cs :
using System;
using System.Data;
using System.Configuration;
using System.Collections;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;
using AllianceBernstein.Wsg.Retail.Common.Data;
using System.Data.SqlClient;
using System.IO;
using System.Drawing;
using System.Web.Services;
using AjaxControlToolkit;
namespace AJAXRajeev
{
[Serializable]
public partial class Default : System.Web.UI.Page
{
protected System.Web.UI.WebControls.Label lblSelectedPath;
protected const string ROOT_PATH = "2:";
protected TreeView Tree
{
get
{
return Accordion1.FindControl("TreeView1") as TreeView;
}
}
protected UpdatePanel UpdatePanel
{
get
{
return Accordion1.FindControl("UpdatePanel1") as UpdatePanel;
}
}
protected void Page_Load(object sender, System.EventArgs e)
{
//UpdateProgress1.AssociatedUpdatePanelID = this.UpdatePanel.ClientID;
Ajax.Utility.RegisterTypeForAjax(typeof(AJAXPortal));
if (!Page.IsPostBack)
{
LoadTree();
}
Folder[] aFolders = Folder.List();
this.Tree.ExpandAll();
}
[Ajax.AjaxMethod()]
private void LoadTree()
{
if (this.Tree == null)
{
return;
}
Folder[] aFolders = Folder.List();
foreach (Folder oFolder in aFolders)
{
TreeNode oTreeNode = new TreeNode();
oTreeNode.Text = oFolder.Name;
oTreeNode.ImageUrl = "/images/folder.gif";
this.Tree.Nodes.Add(oTreeNode);
}
}
internal DataSet ListFolder()
{
throw new Exception("The method or operation is not implemented.");
}
}
}
Please help me with this.
Karamchand
