Object reference not set to an instance of an object.

[Nick71]

Having upgraded from 4.2.0.0 to 4.3.1 I now get the error "Object reference not set to an instance of an object." when I call ShowDialog on my form. The stack trace is below...

Code: Select all

at ComponentFactory.Krypton.Toolkit.KryptonMaskedTextBox.InternalMaskedTextBox.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 ComponentFactory.Krypton.Toolkit.PI.RedrawWindow(IntPtr hWnd, IntPtr rectUpdate, IntPtr hRgnUpdate, UInt32 uFlags)
   at ComponentFactory.Krypton.Toolkit.VisualForm.InvalidateNonClient(Rectangle invalidRect, Boolean excludeClientArea)
   at ComponentFactory.Krypton.Toolkit.VisualForm.InvalidateNonClient()
   at ComponentFactory.Krypton.Toolkit.VisualForm.OnNeedPaint(Object sender, NeedLayoutEventArgs e)
   at ComponentFactory.Krypton.Toolkit.KryptonForm.OnWindowActiveChanged()
   at ComponentFactory.Krypton.Toolkit.VisualForm.set_WindowActive(Boolean value)
   at ComponentFactory.Krypton.Toolkit.VisualForm.OnWM_NCACTIVATE(Message& m)
   at ComponentFactory.Krypton.Toolkit.VisualForm.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.SafeNativeMethods.ShowWindow(HandleRef hWnd, Int32 nCmdShow)
   at System.Windows.Forms.Control.SetVisibleCore(Boolean value)
   at System.Windows.Forms.Form.SetVisibleCore(Boolean value)
   at System.Windows.Forms.Control.set_Visible(Boolean value)
   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.RunDialog(Form form)
   at System.Windows.Forms.Form.ShowDialog(IWin32Window owner)

If I compile the source for 4.3.1, but replace the KryptonMaskedTextBox.cs with the version from 4.2.0.0 (there's just a couple of lines of code changed) it works fine, so appears a bug has been introduced here.

[vulkanino]

Did you UNINSTALL the old version before upgrading?

[Nick71]

I did yes.

[Phil Wright]

I have made a change to the base code that I believe will fix this.

[Nick71]

Thanks Phil. Is there any way I can try this, or do I need to wait for the next release?

Thanks
Nick

[Phil Wright]

Here is the modified source code file for just the KryptonMaskedTextBox

http://www.componentfactory.com/downloa ... TextBox.cs

[Nick71]

Problem solved. Thanks Phil.

[spencerberus]

I am having the same problem, and am using the free Toolkit in an open source project, so don't think I have access to the source code (I don't see it with the installation, at least). Is it possible to get this fix in a compiled version of the Toolkit?

[Phil Wright]

Sorry, but you will need to wait until the next release to get the set of bug fixes.

[robains]

I'm having this problem also. Oddly only when installed on a Windows 2008 Server ... don't have this problem on my development PC (Vista x64).

System.NullReferenceException: Object reference not set to an instance of an object.
at ComponentFactory.Krypton.Toolkit.KryptonMaskedTextBox.InternalMaskedTextBox.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.Callback(IntPtr hWnd, Int32 msg, IntPtr wparam, IntPtr lparam)

Any word on when we'll get a new update from 4.3.1 to 4.3.2?

Thanks, Rob.