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Only items of type Telerik.Web.UI.IRadToolBarButton can initiate postbacks

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ToolBar

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29 Answers, 1 is accepted

answered on 31 Jul 2008, 12:14 PM

Hi Adam,

The problem happens because of the Ajax call not finished. If the long operation changes the RadToolBar structure (or RadToolBar has been dynamically populated), the server-side part of the control receives wrong content. It then tries raising the event from the context of a RadToolBarDropDown, or a RadToolBarItem, or a separator button, hence the error.

What you can do is disable the buttons during the ajax call and enable them after it. This can be achieved by using the client-side events of RadAjaxManager.

Best,
Erjan Gavalji
the Telerik team

Check out Telerik Trainer, the state of the art learning tool for Telerik products.

answered on 08 Aug 2008, 08:04 AM

Hi Adam,

Is it possible for you to scale down the application you have? Here is a possible approach:

Copy the page (having the problem) to a blank website;
Add the required user controls/master pages;
Add a local copy of the database the page might use and remove the sensitive information/reduce the information as much as possible;
If there are some controls/classes that need classes from another assembly either remove them or create some stub classes so that they let the page work;
Start removing controls from the page one by one until the problem is gone. This would mean that the problem lies in the last removed component;

Having a sample, capable of demonstrating the problem on our side will really help us identify and fix it faster.
Best regards,
Erjan Gavalji
the Telerik team

Check out Telerik Trainer, the state of the art learning tool for Telerik products.

answered on 22 Aug 2008, 01:10 PM

I get this error any time I click an a button that has been dynamically created in my tool bar. If I add the same button with the designer it works fine.

RadToolBarButton EditButton = new RadToolBarButton("Edit", false, "TextStyleBold");

EditButton.CssClass =

"ASP_EditBtn";

RadToolBar1.Items.Add(EditButton);

protected void RadToolBar1_ButtonClick(object sender, RadToolBarEventArgs e)

{

TestLabel.Text =

"You Clicked the " + e.Item.Text + " Button";

}

Server Error in '/' Application.

Only items of type Telerik.Web.UI.IRadToolBarButton can initiate postbacks

Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code.

Exception Details: System.InvalidOperationException: Only items of type Telerik.Web.UI.IRadToolBarButton can initiate postbacks

Source Error:

An unhandled exception was generated during the execution of the current web request. Information regarding the origin and location of the exception can be identified using the exception stack trace below.

Stack Trace:


            [InvalidOperationException: Only items of type Telerik.Web.UI.IRadToolBarButton can initiate postbacks]
   Telerik.Web.UI.RadToolBar.RaisePostBackEvent(String eventArgument) +193
   Telerik.Web.UI.RadToolBar.System.Web.UI.IPostBackEventHandler.RaisePostBackEvent(String eventArgument) +7
   System.Web.UI.Page.RaisePostBackEvent(IPostBackEventHandler sourceControl, String eventArgument) +11
   System.Web.UI.Page.RaisePostBackEvent(NameValueCollection postData) +177
   System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +1746

Version Information: Microsoft .NET Framework Version:2.0.50727.1433; ASP.NET Version:2.0.50727.1433

Remove the dynamic code to add the buttons and add this on the page it works

<Items>

<telerik:RadToolBarButton runat="server" CssClass="ASP_AddBtn" Text="Add">

</telerik:RadToolBarButton>

<telerik:RadToolBarButton runat="server" CssClass="ASP_EditBtn" Text="Edit">

</telerik:RadToolBarButton>

</Items>

answered on 26 Aug 2008, 06:34 AM

ServerErrorOfDynamicallyAddedButtonTest.zip

Hi Terry,

Please, find attached the page I used. Can you please, modify it to demonstrate the error? Please, open a formal support ticket to send us the modified file.

Thanks,
Erjan Gavalji
the Telerik team

Check out Telerik Trainer, the state of the art learning tool for Telerik products.

answered on 30 Nov 2009, 06:11 PM

Hi people,

I am using Telerik 2009.3 version. My specific scenario is following:
I have a grid which shows all records in large form when specific row is selected.
The form itself is in panel which is visible="false" by default and is visible when some row is selected. at first page load the form asp:panel is not visible.
When I am putting the toolbar in the form panel I am getting the error - Error: Sys.WebForms.PageRequestManagerServerErrorException: Only items of type Telerik.Web.UI.IRadToolBarButton can initiate postbacks

while when I taking RadToolBar out from this asp:panel it works just fine.

Thanks in advance,
Armen

answered on 07 Dec 2009, 12:15 PM

Hi Erjan,

To reproduce the problem you may check this simple code. The problem is because the container of toolbar has property of enableviewstate set the to false, I just turned it on and it works. Hope this will help to some folks that may have this issue.

    
            <%@ Page Language="C#" AutoEventWireup="true" CodeBehind="Default.aspx.cs" Inherits="TestToolbar._Default" %> 
        
            <!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 runat="server">  
        
                <title></title>  
        
            </head> 
        
            <body> 
        
                <form id="form1" runat="server">  
        
                    <telerik:radscriptmanager id="RadScriptManager1" runat="server">  
        
                        <Scripts> 
        
                            <asp:ScriptReference Assembly="Telerik.Web.UI" Name="Telerik.Web.UI.Common.Core.js" /> 
        
                            <asp:ScriptReference Assembly="Telerik.Web.UI" Name="Telerik.Web.UI.Common.jQuery.js" /> 
        
                        </Scripts> 
        
                    </telerik:radscriptmanager> 
        
                    <telerik:radformdecorator runat="server" id="defaultFormDecorator"   
        
                        Skin="Forest" /> 
        
                    <telerik:radajaxloadingpanel id="defaultLoadingPanel" runat="server"   
        
                        IsSticky="True" MinDisplayTime="200" Skin="Forest" /> 
        
                    <telerik:radajaxmanager id="defaultAjaxManager" runat="server"></telerik:radajaxmanager> 
        
                    <telerik:radajaxpanel runat="server" id="supplierAjaxPanel" loadingpanelid="defaultLoadingPanel" EnableViewState="false">  
        
                        <asp:Label ID="lblTest" runat="server"></asp:Label> 
        
                        <asp:Button id="btnShow" runat="server" onclick="btnShow_Click" Text="Show" /> 
        
                        <asp:Panel ID="pnlToolbar" runat="server" Visible="false">  
        
                        <telerik:RadToolBar runat="server" ID="rtbManage" CssClass="Toolbar" Width="100%"   
        
                                OnButtonClick="rtbManage_ButtonClick" Skin="Forest">  
        
                            <Items> 
        
                                <telerik:RadToolBarButton ImageUrl="~/Resources/Toolbar/Save.gif" ImagePosition="Left" 
        
                                    Text="SaveText" CommandName="SaveButton" runat="server">  
        
                                </telerik:RadToolBarButton> 
        
                                <telerik:RadToolBarButton ImageUrl="~/Resources/Toolbar/cancel.png" ImagePosition="Left" 
        
                                    Text="Cancel" CommandName="Cancel" runat="server">  
        
                                </telerik:RadToolBarButton> 
        
                                <telerik:RadToolBarButton ImageUrl="~/Resources/Toolbar/delete.png" ImagePosition="Left" 
        
                                    Text="Delete" CommandName="Delete" runat="server">  
        
                                </telerik:RadToolBarButton> 
        
                            </Items> 
        
                        </telerik:RadToolBar> 
        
                    </asp:Panel> 
        
                </telerik:radajaxpanel> 
        
                </form> 
        
            </body> 
        
            </html>

    
            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;  
        
            namespace TestToolbar  
        
            {  
        
                public partial class _Default : System.Web.UI.Page  
        
                {  
        
                    protected void Page_Load(object sender, EventArgs e)  
        
                    {  
        
                    }  
        
                    protected void rtbManage_ButtonClick(object sender, RadToolBarEventArgs e)  
        
                    {  
        
                        RadToolBarButton btn = e.Item as RadToolBarButton;  
        
                        lblTest.Text = "Command: " + btn.CommandName;  
        
                    }  
        
                    protected void btnShow_Click(object sender, EventArgs e)  
        
                    {  
        
                        pnlToolbar.Visible = !pnlToolbar.Visible;  
        
                    }  
        
                }  
        
            }

Regards,
Armen