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Load on deman RadCombox in RadGrid Error

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ComboBox
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Reza
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Reza asked on 25 Nov 2008, 08:09 PM
I created a usercontrol that contains an enabled load on demand radcombobox.
<div>
<telerik:RadComboBox ShowMoreResultsBox="true" EnableLoadOnDemand="True" EnableVirtualScrolling="true" 
                //set other properties >
                </telerik:RadComboBox>
            </div>

This usercontrol uses to edit data on a radgrid same as your sample.

<telerik:RadGrid //set properties >
            <MasterTableView //set properties >
                <Columns>
                    //My Columns....
                </Columns>

                <EditFormSettings UserControlName="sampleUserControl.ascx" EditFormType="WebUserControl">
                    <EditColumn UniqueName="EditCommandColumn1">
                    </EditColumn>
                </EditFormSettings>
            </MasterTableView>
        </telerik:RadGrid>

when click on combobox on grid, I get "The target xxx$radcombox1' for the callback could not be found or did not implement ICallbackEventHandler."
please help me to solve it.

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Simon
Telerik team
answered on 28 Nov 2008, 01:55 PM
Hello Reza,

The cause of this error may lie in the code-behind of your page.

Could you paste it here or open a support ticket and send us the page or a small project where the issue can be observed?

In both cases, we will inspect the code and hopefully will determine what is causing the issue.

Thank you in advance.

Greetings,
Simon
the Telerik team

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Anthony
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answered on 19 Mar 2009, 07:48 PM
I have exactly same problem. Reza, could you let me know what did you do to fix this error.

Thanks,

Anthony
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Reza
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answered on 19 Mar 2009, 09:00 PM
I had this problem when i add a control (for example a customvalidator) at position zero in server side code on createchildcontrols method. I added that control on contrstructor to solve it. I hope your problem solve by this way, Because i spent several days to find this problem.

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tparus
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answered on 30 Jun 2009, 11:30 PM
Hi Reza:

Can you share with me what you did to resolve this? I have a page with dynamically created RadDockZone, RadDock and my User Control that contains a load on demand radcombobox. I am getting the same error. Finding a solution is driving me nuts.

Many thanks in advance!
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Reza
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Simon
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Anthony
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Reza
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tparus
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