When refreshing my data source

[superold]

Hi.

An exception is thrown when I reset my data source (first to null to clear it), but I dont know when it really happens. It happens very seldom but it does happen.

Object reference not set to an instance of an object.

   at Telerik.WinControls.UI.TableViewDefinitionBase.GetRowHeight(GridViewRowInfo rowInfo, IGridView gridView)

   at Telerik.WinControls.UI.GridTableBodyElement.GetRowHeight(GridRowElement row, Single y, SizeF availableSize)

   at Telerik.WinControls.UI.GridTableBodyElement.ArrangeOverride(SizeF finalSize)

   at Telerik.WinControls.RadElement.ArrangeCore(RectangleF finalRect)

   at Telerik.WinControls.RadElement.Arrange(RectangleF finalRect)

   at Telerik.WinControls.Layouts.ContextLayoutManager.UpdateLayout()

   at Telerik.WinControls.Layouts.ContextLayoutManager.UpdateLayoutCallback(ILayoutManager manager)

Thanks,

-j

[Jack]

Hi Jorge Delgado-Lopez,

Thank you for contacting us.

We have never observed this issue before. Nevertheless, we will investigate it further. Maybe the issue is related with some events that you handle (e.g CellFormatting, CellEndEdit?). Please write us when you find the exact sequence to reproduce the issue. Please send us also your project, so we can review it and locate the issue.

I am looking forward to your reply.

Sincerely yours,
Jack
the Telerik team

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[Plaza]

I have same problem, Error is:

objEx.Message: Object reference not set to an instance of an object. objEx.StackTrace: at Telerik.WinControls.Layouts.ContextLayoutManager.LayoutQueue._removeRequest(Request entry) at Telerik.WinControls.Layouts.ContextLayoutManager.LayoutQueue.RemoveOrphans(RadElement parent) at Telerik.WinControls.Layouts.ContextLayoutManager.LayoutQueue.Add(RadElement e) at Telerik.WinControls.RadElement.InvalidateArrange(Boolean recursive) at Telerik.WinControls.RadElement.Measure(SizeF availableSize) at Telerik.WinControls.Layouts.ContextLayoutManager.UpdateLayout() at Telerik.WinControls.Layouts.ContextLayoutManager.UpdateLayoutCallback(ILayoutManager manager)

but I dont know when it really happens, I need help !

[Dimitar]

Hi,

The stack traces are different and this indicates that this is another issue. Usually, exceptions that lead to ContextLayoutManager are connected to cross-thread operations. Please make sure that you are not updating the grid from other than the UI thread. 

I hope this will be useful. Let me know if you have additional questions.


Regards,
Dimitar
Progress Telerik