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RadListBox Error when adding from another thread

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ComboBox and ListBox (obsolete as of Q2 2010)

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Sasa Milovic asked on 11 Jun 2007, 10:14 AM

Hi

I am adding items to listbox like this (from a background worker thread).

dim d as New AddDelegate(AddressOf radListBox1.Items.Add)
dim item as New RadListBoxItem
item.Text = "some text"
dim args() as Object = {item}
radListBox1.Invoke(d, args)

However I sometimes get an error after some items are added (I think it
is also if an item is selected in the listbox and if I change hide and show the form). This is thrown on the main form. If tried using the BeginUpdate and EndUpdate method as well, but that doesn't seem to make a difference.

This is the message
    "Parameter is not valid."

Here is the stack trace

   at System.Drawing.Graphics.CheckErrorStatus(Int32 status)
   at System.Drawing.Graphics.DrawImage(Image image, Int32 x, Int32 y, Int32 width, Int32 height)
   at System.Drawing.Graphics.DrawImage(Image image, Rectangle rect)
   at Telerik.WinControls.Paint.RadGdiGraphics.DrawBitmap(Image image, Int32 x, Int32 y, Double opacity)
   at Telerik.WinControls.Paint.RadGdiGraphics.DrawBitmap(Image image, Int32 x, Int32 y)
   at Telerik.WinControls.Primitives.FillElementPaintBuffer.ResetGraphics(IGraphics g, SizeF scale)
   at Telerik.WinControls.Primitives.FillPrimitive.PaintPrimitive(IGraphics g, Single angle, SizeF scale)
   at Telerik.WinControls.Primitives.BasePrimitive.PaintElement(IGraphics graphics, Single angle, SizeF scale)
   at Telerik.WinControls.RadElement.PaintElement(Graphics rawGraphics, IGraphics graphics, Single angle, SizeF scale, Region currentClip)
   at Telerik.WinControls.RadElement.Paint(IGraphics graphics, Rectangle clipRectangle, Single angle, SizeF scale, Boolean useRelativeTransformation)
   at Telerik.WinControls.RadElement.PaintOverride(IGraphics graphics, Rectangle clipRectangle, Single angle, SizeF scale, Boolean useRelativeTransformation)
   at Telerik.WinControls.RadElement.PaintChildren(IGraphics graphics, Rectangle clipRectange, Single angle, SizeF scale, Boolean useRelativeTransformation)
   at Telerik.WinControls.VisualElement.PaintChildren(IGraphics graphics, Rectangle clipRectange, Single angle, SizeF scale, Boolean useRelativeTransformation)
   at Telerik.WinControls.RadElement.Paint(IGraphics graphics, Rectangle clipRectangle, Single angle, SizeF scale, Boolean useRelativeTransformation)
   at Telerik.WinControls.RadItem.PaintOverride(IGraphics screenRadGraphics, Rectangle clipRectangle, Single angle, SizeF scale, Boolean useRelativeTransformation)
   at Telerik.WinControls.RadElement.PaintChildren(IGraphics graphics, Rectangle clipRectange, Single angle, SizeF scale, Boolean useRelativeTransformation)
   at Telerik.WinControls.RadElement.Paint(IGraphics graphics, Rectangle clipRectangle, Single angle, SizeF scale, Boolean useRelativeTransformation)
   at Telerik.WinControls.RadElement.PaintOverride(IGraphics graphics, Rectangle clipRectangle, Single angle, SizeF scale, Boolean useRelativeTransformation)
   at Telerik.WinControls.RadElement.PaintChildren(IGraphics graphics, Rectangle clipRectange, Single angle, SizeF scale, Boolean useRelativeTransformation)
   at Telerik.WinControls.RadElement.Paint(IGraphics graphics, Rectangle clipRectangle, Single angle, SizeF scale, Boolean useRelativeTransformation)
   at Telerik.WinControls.RadElement.PaintOverride(IGraphics graphics, Rectangle clipRectangle, Single angle, SizeF scale, Boolean useRelativeTransformation)
   at Telerik.WinControls.RadElement.PaintChildren(IGraphics graphics, Rectangle clipRectange, Single angle, SizeF scale, Boolean useRelativeTransformation)
   at Telerik.WinControls.VisualElement.PaintChildren(IGraphics graphics, Rectangle clipRectange, Single angle, SizeF scale, Boolean useRelativeTransformation)
   at Telerik.WinControls.RadElement.Paint(IGraphics graphics, Rectangle clipRectangle, Single angle, SizeF scale, Boolean useRelativeTransformation)
   at Telerik.WinControls.RadItem.PaintOverride(IGraphics screenRadGraphics, Rectangle clipRectangle, Single angle, SizeF scale, Boolean useRelativeTransformation)
   at Telerik.WinControls.RadElement.PaintChildren(IGraphics graphics, Rectangle clipRectange, Single angle, SizeF scale, Boolean useRelativeTransformation)
   at Telerik.WinControls.VisualElement.PaintChildren(IGraphics graphics, Rectangle clipRectange, Single angle, SizeF scale, Boolean useRelativeTransformation)
   at Telerik.WinControls.RadElement.Paint(IGraphics graphics, Rectangle clipRectangle, Single angle, SizeF scale, Boolean useRelativeTransformation)
   at Telerik.WinControls.RootRadElement.Paint(IGraphics graphics, Rectangle clipRectangle)
   at Telerik.WinControls.RadControl.OnPaint(PaintEventArgs e)
   at System.Windows.Forms.Control.PaintWithErrorHandling(PaintEventArgs e, Int16 layer, Boolean disposeEventArgs)
   at System.Windows.Forms.Control.WmPaint(Message& m)
   at System.Windows.Forms.Control.WndProc(Message& m)
   at System.Windows.Forms.ScrollableControl.WndProc(Message& m)
   at Telerik.WinControls.RadControl.WndProc(Message& m)
   at System.Windows.Forms.Control.ControlNativeWindow.OnMessage(Message& m)
   at System.Windows.Forms.Control.ControlNativeWindow.WndProc(Message& m)
   at System.Windows.Forms.NativeWindow.DebuggableCallback(IntPtr hWnd, Int32 msg, IntPtr wparam, IntPtr lparam)
   at System.Windows.Forms.UnsafeNativeMethods.DispatchMessageW(MSG& msg)
   at System.Windows.Forms.Application.ComponentManager.System.Windows.Forms.UnsafeNativeMethods.IMsoComponentManager.FPushMessageLoop(Int32 dwComponentID, Int32 reason, Int32 pvLoopData)
   at System.Windows.Forms.Application.ThreadContext.RunMessageLoopInner(Int32 reason, ApplicationContext context)
   at System.Windows.Forms.Application.ThreadContext.RunMessageLoop(Int32 reason, ApplicationContext context)
   at System.Windows.Forms.Application.Run(Form mainForm)
   at Dcsa.WpAdmin2.UI.Startup.Main() in C:\_SourceCode\DCX (SA) Workplace\Workplace.Windows\Workplace.Admin.UI\Startup.vb:line 7
   at System.AppDomain.nExecuteAssembly(Assembly assembly, String[] args)
   at System.AppDomain.ExecuteAssembly(String assemblyFile, Evidence assemblySecurity, String[] args)
   at Microsoft.VisualStudio.HostingProcess.HostProc.RunUsersAssembly()
   at System.Threading.ThreadHelper.ThreadStart_Context(Object state)
   at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state)
   at System.Threading.ThreadHelper.ThreadStart()

4 Answers, 1 is accepted

answered on 18 Nov 2009, 06:49 PM

I hate to bump such an old thread, but I'm having a similar issue and would like to know if there ever was a resolution to this problem. The top of my stack:

Unhandled Exception -- Parameter is not valid

System.Drawing.StringFormat.get_Trimming()
Telerik.WinControls.Paint.RadGdiGraphics.DrawString
Telerik.WinControls.Paint.RadGdiGraphics.DrawString
Telerik.WinControls.UI.LightVisualElement.PaintText
Telerik.WinControls.UI.LightVisualElement.PaintContent

The exception box was unresponsive so I couldn't get the full stack, but I certainly don't make any calls to any drawing/gdi related functions. This app is a radgrid bound to a datatable. This seems to happen when the data in the datatable is being updated. During the update, the grid is in SuspendLayout() and the datatable is in BeginLoadData() mode. There is also a comboBox that is populated when it's expanded (depending on which tab is selected, each tab has a separate radgrid bound to a different datatable).

Another thing that looks odd is that the exception is claimed to be unhandled... All the code in my program's main() is in a try/catch block, I'm not sure how this is going unhandled.

Any help/insight would be hugely appreciated.

Thanks,
Baris

answered on 18 Nov 2009, 08:39 PM

So I found this other thread http://www.telerik.com/community/forums/aspnet/chart/33013-parameter-is-not-valid.aspx where the last post talks about the per process limit of GDI and User handles. I upped the number of GDI handles to the max of 64k, and User handles to the max of 18000, hoping this would resolve the issue -- since the symptom of running out of GDI handles is exactly what I'm seeing, where the GUI element that failed to draw becomes a "Red X" and the exception is thrown.

Unfortunately, we just saw this problem again, and with a different stack trace (the stack is sort of random when this happens). It is below, just in case it provides more details.

See the end of this message for details on invoking

just-in-time (JIT) debugging instead of this dialog box.

************** Exception Text **************

System.NullReferenceException: Object reference not set to an instance of an object.

at Telerik.WinControls.UI.GridCellElement.PaintElement(IGraphics graphics, Single angle, SizeF scale)

at Telerik.WinControls.RadElement.PaintElement(Graphics rawGraphics, IGraphics graphics, Single angle, SizeF scale, Region currentClip)

at Telerik.WinControls.RadElement.Paint(IGraphics graphics, Rectangle clipRectangle, Single angle, SizeF scale, Boolean useRelativeTransformation)