Filtering in Grid View Exception

[Cristi Catalan]

Hello,

I am encountering the following Exception after clicking on different column filters repeatedly.

"Object reference not set to an instance of an object."

 at Telerik.Windows.Controls.GridView.FilteringDropDown.OnDropDownPopupOpened(Object sender, EventArgs e)
   at Telerik.Windows.Controls.PopupWrapper.OnPopupOpened(Object sender, EventArgs e)
   at System.Windows.CoreInvokeHandler.InvokeEventHandler(Int32 typeIndex, Delegate handlerDelegate, Object sender, Object args)
   at MS.Internal.JoltHelper.FireEvent(IntPtr unmanagedObj, IntPtr unmanagedObjArgs, Int32 argsTypeIndex, String eventName)

There is no particular sequence to get the Exception, But clicking on different column filters randomly one after the other gives this Exception. I am using Version 2010.1.309.35

 Any ideeas why this occurs?

Thanks

[Rossen Hristov]

Hello Cristi Catalan,

Can you try with the Service Pack that will come out today or tomorrow? Maybe the issue will be gone with the new binaries.

In case it is not gone, could you please send us your sample project. We have tried clicking like you said, but we could not get the exception to occur.

Thanks in advance.

Kind regards,
Ross
the Telerik team

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[Pasha Kolhoznik]

I have the same Exception
Error: Unhandled Error in Silverlight 2 Application  Instance does not contain reference to an object. in Telerik.Windows.Controls.GridView.FilteringDropDown.OnDropDownPopupClosed(Object sender, EventArgs e)
   в MS.Internal.CoreInvokeHandler.InvokeEventHandler(Int32 typeIndex, Delegate handlerDelegate, Object sender, Object args)
   в MS.Internal.JoltHelper.FireEvent(IntPtr unmanagedObj, IntPtr unmanagedObjArgs, Int32 argsTypeIndex, String eventName)

It happens once in maybe a hundred clicks. I use  FilteringDropDown with a custom style (which I create in Blend) which in turn is a part of a custom style for GridViewHeaderCell. I did not clicked so persistently on an ordinary GridView so I cannot say if the reason is that I use custom styles but it definately gives  either OnDropDownPopupClosed or OnDropDownPopupOpened exception on a regular basis.
I use  2010.1.422.1030

[Rossen Hristov]

Hi Pasha Kolhoznik,

If you can send us your project, we will take a look at it. Also, tell us what, where and how to click.

All the best,
Ross
the Telerik team

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[Arunas Tamulis]

I have the same problem. error occurs when I click the filter button on the column which contains large blocks of text.
I am using  RadControls_for_Silverlight_4_2010_3_1110_DEV. version

[Yordanka]

Hello,

The problem is fixed in our latest internal build - version .1304.
Respectively, the fix will be part of the upcoming Q3 2010 SP1 which will be released officially later today.
 
All the best,
Yordanka
the Telerik team