Gridview desposed during main thread invocation. Please help!!!

[Eyal]

 

I build a winform application with some grid-views, when I invoking anything (textboxes, the main form and more) I am getting exception: Object reference not set to an instance of an object.

I really don’t know what to do; we are in an advance project developing so replaceing the telerik components will not the best idea.

Any suggestions?

 

(see stack trace below)

   at Telerik.WinControls.UI.GridVirtualizedRowElement.DetachCells()

   at Telerik.WinControls.UI.GridVirtualizedRowElement.Detach()

   at Telerik.WinControls.UI.GridDataRowElement.Detach()

   at Telerik.WinControls.UI.GridRowElement.DisposeManagedResources()

   at Telerik.WinControls.DisposableObject.PerformDispose(Boolean disposing)

   at Telerik.WinControls.RadElement.PerformDispose(Boolean disposing)

   at Telerik.WinControls.DisposableObject.Dispose(Boolean disposing)

   at Telerik.WinControls.DisposableObject.Dispose()

   at Telerik.WinControls.RadElement.DisposeChildren()

   at Telerik.WinControls.RadElement.PerformDispose(Boolean disposing)

   at Telerik.WinControls.DisposableObject.Dispose(Boolean disposing)

   at Telerik.WinControls.DisposableObject.Dispose()

   at Telerik.WinControls.RadElement.DisposeChildren()

   at Telerik.WinControls.RadElement.PerformDispose(Boolean disposing)

   at Telerik.WinControls.DisposableObject.Dispose(Boolean disposing)

   at Telerik.WinControls.DisposableObject.Dispose()

   at Telerik.WinControls.RadElement.DisposeChildren()

   at Telerik.WinControls.RadElement.PerformDispose(Boolean disposing)

   at Telerik.WinControls.DisposableObject.Dispose(Boolean disposing)

   at Telerik.WinControls.DisposableObject.Dispose()

   at Telerik.WinControls.RadElement.DisposeChildren()

   at Telerik.WinControls.RadElement.PerformDispose(Boolean disposing)

   at Telerik.WinControls.DisposableObject.Dispose(Boolean disposing)

   at Telerik.WinControls.DisposableObject.Dispose()

   at Telerik.WinControls.RadElement.DisposeChildren()

   at Telerik.WinControls.RadElement.PerformDispose(Boolean disposing)

   at Telerik.WinControls.DisposableObject.Dispose(Boolean disposing)

   at Telerik.WinControls.DisposableObject.Dispose()

   at Telerik.WinControls.RadElement.DisposeChildren()

   at Telerik.WinControls.RadElement.PerformDispose(Boolean disposing)

   at Telerik.WinControls.DisposableObject.Dispose(Boolean disposing)

   at Telerik.WinControls.DisposableObject.Dispose()

   at Telerik.WinControls.ComponentThemableElementTree.Dispose(Boolean disposing)

   at Telerik.WinControls.RadElementTree.Dispose()

   at Telerik.WinControls.RadControl.Dispose(Boolean disposing)

   at Telerik.WinControls.UI.RadGridView.Dispose(Boolean disposing)

   at System.ComponentModel.Component.Dispose()

   at System.Windows.Forms.Control.Dispose(Boolean disposing)

   at System.ComponentModel.Component.Dispose()

   at System.Windows.Forms.Control.Dispose(Boolean disposing)

   at Telerik.WinControls.RadControl.Dispose(Boolean disposing)

   at System.ComponentModel.Component.Dispose()

   at System.Windows.Forms.Control.Dispose(Boolean disposing)

   at System.Windows.Forms.Form.Dispose(Boolean disposing)

   at Telerik.WinControls.UI.RadFormControlBase.Dispose(Boolean disposing)

   at Telerik.WinControls.UI.RadForm.Dispose(Boolean disposing)

   at Generic_EI.CELL_PC.Dispose(Boolean disposing) in C:\DevelopZone\TowerProjects\Fab1Automation\NEW_CELL_PC\Generic_EI\CELL_PC.Designer.cs:line 20

   at System.ComponentModel.Component.Dispose()

   at System.Windows.Forms.ApplicationContext.Dispose(Boolean disposing)

   at System.Windows.Forms.Application.ThreadContext.DisposeThreadWindows()

[Jack]

Hi Eyal,

Thank you for contacting us.

Please note that all UI controls in WinForms and .Net framework are not thread safe. You should use the Invoke method when invoking UI control methods from different thread. If this is not the case, please send us your application and describe the exact steps to reproduce the issue. We will investigate it in detail and we will try to find the best option to solve the issue.

I am looking forward to your reply.
 
Kind regards,
Jack
the Telerik team