Hello,

In my webpage I try to add a user control into RadPanelBar during ItemDataBound event. The user control showed up correctly after the 1^st page load, but if user do post back the adding control is disappeared. I figured it could be related to viewstate mismatch, so I try give control a unique ID but problem still persist.

 

Any help is very appreciated!

 

Here is my test page code: http://209.200.250.235/Dynamic_panelbar_test.zip

 

Thanks.

(test.aspx)

 

	<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="test.aspx.cs" Inherits="test" %>
	<%@ Register Assembly="Telerik.Web.UI" Namespace="Telerik.Web.UI" TagPrefix="telerik" %>
	<!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" style="height: 100%; width: 100%; margin: 0px;
	padding: 0px; overflow: hidden;">
	<head runat="server">
	<title></title>
	</head>
	<body style="height: 100%; width: 100%; margin: 0px; padding: 0px; overflow: hidden;">
	<form runat="server">
	<telerik:RadScriptManager ID="uxRadScriptManager" runat="server">
	</telerik:RadScriptManager>
	<telerik:RadAjaxManager ID="uxRadAjaxManager" runat="server">
	</telerik:RadAjaxManager>
	<telerik:RadPanelBar ID="uxRadMenuBarML" runat="server" BorderStyle="None" BorderWidth="0px" Height="372px"
	PersistStateInCookie="True" Width="400px" OnItemDataBound="uxRadMenuBarML_ItemDataBound"
	OnItemClick="uxRadMenuBarML_ItemClick" Style="" Skin="Office2007" EnableEmbeddedSkins="true">
	</telerik:RadPanelBar>
	</form>
	</body>
	</html>

(test.aspx.cs)

	using System;
	using System.Collections.Generic;
	using System.Linq;
	using System.Web;
	using System.Web.UI;
	using System.Web.UI.WebControls;
	using Telerik.Web.UI;
	using System.Globalization;
	[System.Diagnostics.CodeAnalysis.SuppressMessage("Microsoft.Naming", "CA1709:IdentifiersShouldBeCasedCorrectly", MessageId = "test")]
	public partial class test : System.Web.UI.Page
	{
	private List<LFMenuBarDataItem> _menuBarDataItem;
	protected void Page_Load(object sender, EventArgs e)
	{
	//enable AJAX update on PanelBar
	RadAjaxManager.GetCurrent(Page).AjaxSettings.AddAjaxSetting(this.uxRadMenuBarML, this.uxRadMenuBarML);
	}
	protected override void OnInit(EventArgs e)
	{
	base.OnInit(e);
	_menuBarDataItem = new List<LFMenuBarDataItem>();
	//-----------
	AddMenuBarItem(0, "Search", "~/UCSearch.ascx");
	AddMenuBarItem(1, null, "Home", "", "", false, false);
	AddMenuBarItem(2, null, "My Inbox", "", "", false, false);
	AddMenuBarItem(3, 1, "dummy item 1", "", "", false, false);
	AddMenuBarItem(4, 2, "dummy item 2", "", "", false, false);
	//-----------
	uxRadMenuBarML.DataTextField = "Title";
	uxRadMenuBarML.DataFieldID = "ID";
	uxRadMenuBarML.DataFieldParentID = "ParentID";
	uxRadMenuBarML.DataSource = _menuBarDataItem;
	uxRadMenuBarML.DataBind();
	}
	/// <summary>
	/// Adds the menu bar item. (used by presenter to set menu items)
	/// </summary>
	/// <param name="id">The id.</param>
	/// <param name="parentId">The parent id.</param>
	/// <param name="title">The title.</param>
	/// <param name="userControlPath">The user control path.</param>
	/// <param name="imagePath">The left side image path.</param>
	/// <param name="isPinDisplayed">if set to <c>true</c> [current pin is displayed].</param>
	/// <param name="isMenuExpanded">if set to <c>true</c> [current menu is expanded].</param>
	public void AddMenuBarItem(int id, int? parentId, string title, string userControlPath, string imagePath, bool isPinDisplayed, bool isMenuExpanded)
	{
	LFMenuBarDataItem menuBarDataItem = new LFMenuBarDataItem
	{
	Id = id,
	ParentId = parentId,
	Title = title,
	PagePath = userControlPath,
	ImagePath = imagePath,
	IsPinDisplayed = isPinDisplayed,
	IsMenuExpanded = isMenuExpanded,
	IsNestedUserControl = false
	};
	_menuBarDataItem.Add(menuBarDataItem);
	}
	/// <summary>
	/// Adds the menu bar item. (used by presenter to set menu items)
	/// -this overload is used to install nested user control menu item
	/// </summary>
	/// <param name="id">The id.</param>
	/// <param name="nestUserControlPath">The nest user control path.</param>
	public void AddMenuBarItem(int id, string title, string nestUserControlPath)
	{
	LFMenuBarDataItem menuBarDataItem = new LFMenuBarDataItem
	{
	Id = id,
	Title = title,
	NestedUserControlPath = nestUserControlPath,
	IsNestedUserControl = true
	};
	_menuBarDataItem.Add(menuBarDataItem);
	}
	/// <summary>
	/// Handles the ItemClick event of the uxRadMenuBarML control.
	/// </summary>
	/// <param name="sender">The source of the event.</param>
	/// <param name="e">The <see cref="Telerik.Web.UI.RadPanelBarEventArgs"/> instance containing the event data.</param>
	protected void uxRadMenuBarML_ItemClick(object sender, RadPanelBarEventArgs e)
	{
	}
	/// <summary>
	/// Handles the ItemDataBound event of the uxRadMenuBarML control.
	/// </summary>
	/// <param name="sender">The source of the event.</param>
	/// <param name="e">The <see cref="Telerik.Web.UI.RadPanelBarEventArgs"/> instance containing the event data.</param>
	protected void uxRadMenuBarML_ItemDataBound(object sender, RadPanelBarEventArgs e)
	{
	LFMenuBarDataItem item = (LFMenuBarDataItem)e.Item.DataItem;
	if (item.IsNestedUserControl) // nested user control
	{
	//Control ctl = Page.LoadControl(item.NestedUserControlPath); // load user control
	Button ctl = new Button(); // here we create a dummy button control for test
	ctl.Text = "I am a test button. Click me and I should not disappear";
	ctl.ID = "TestButton" + Guid.NewGuid().ToString();
	RadPanelItem radPanelItem = new RadPanelItem();
	radPanelItem.Controls.Add(ctl);
	e.Item.Items.Clear();
	e.Item.Items.Add(radPanelItem);
	}
	else // normal menubar item
	{
	e.Item.ImageUrl = item.ImagePath;
	}
	e.Item.Value = item.Id.ToString(CultureInfo.InvariantCulture);
	e.Item.Expanded = item.IsMenuExpanded;
	}
	/// <summary>
	/// Data class stores menu bar data item
	/// </summary>
	internal class LFMenuBarDataItem
	{
	public bool IsNestedUserControl
	{
	get;
	set;
	}
	[System.Diagnostics.CodeAnalysis.SuppressMessage("Microsoft.Performance", "CA1811:AvoidUncalledPrivateCode")]
	public bool IsPinDisplayed
	{
	get;
	set;
	}
	public bool IsMenuExpanded
	{
	get;
	set;
	}
	[System.Diagnostics.CodeAnalysis.SuppressMessage("Microsoft.Performance", "CA1811:AvoidUncalledPrivateCode")]
	public string Title
	{
	get;
	set;
	}
	public int Id
	{
	get;
	set;
	}
	[System.Diagnostics.CodeAnalysis.SuppressMessage("Microsoft.Performance", "CA1811:AvoidUncalledPrivateCode")]
	public int? ParentId
	{
	get;
	set;
	}
	public string ImagePath
	{
	get;
	set;
	}
	[System.Diagnostics.CodeAnalysis.SuppressMessage("Microsoft.Performance", "CA1811:AvoidUncalledPrivateCode")]
	public string PagePath
	{
	get;
	set;
	}
	[System.Diagnostics.CodeAnalysis.SuppressMessage("Microsoft.Performance", "CA1811:AvoidUncalledPrivateCode")]
	public string NestedUserControlPath
	{
	get;
	set;
	}
	}
	}

(test.aspx.designer.cs)

	//------------------------------------------------------------------------------
	// <auto-generated>
	//     This code was generated by a tool.
	//     Runtime Version:2.0.50727.3053
	//
	//     Changes to this file may cause incorrect behavior and will be lost if
	//     the code is regenerated.
	// </auto-generated>
	//------------------------------------------------------------------------------
	public partial class test {
	/// <summary>
	/// uxRadScriptManager control.
	/// </summary>
	/// <remarks>
	/// Auto-generated field.
	/// To modify move field declaration from designer file to code-behind file.
	/// </remarks>
	protected global::Telerik.Web.UI.RadScriptManager uxRadScriptManager;
	/// <summary>
	/// uxRadAjaxManager control.
	/// </summary>
	/// <remarks>
	/// Auto-generated field.
	/// To modify move field declaration from designer file to code-behind file.
	/// </remarks>
	protected global::Telerik.Web.UI.RadAjaxManager uxRadAjaxManager;
	/// <summary>
	/// uxRadMenuBarML control.
	/// </summary>
	/// <remarks>
	/// Auto-generated field.
	/// To modify move field declaration from designer file to code-behind file.
	/// </remarks>
	protected global::Telerik.Web.UI.RadPanelBar uxRadMenuBarML;
	}

(test.aspx.cs)(test.aspx.designer.cs)

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< - Save - >

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Hi,

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what wrong in this code.


Default.aspx:


Default.aspx.cs:

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My c# code is:

The markup for the grid is:

hi

Do you all have any solution to my thread?

http://www.telerik.com/community/forums/aspnet-ajax/grid/no-update-and-no-error-using-objectdatasource.aspx