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Error Raised In Docking Manager When Moving Splitter Bar

Thread ID:





62148 Jun 8,2007 01:47 PM UTC Jun 8,2007 05:29 PM UTC WinForms 1
Tags: Tools
Asked On June 8, 2007 01:47 PM UTC

After I set the docking state of my docking manger with tabbed panels I get an error when I move the splitter bar. I've included a sample app and if you follow the instructions below you can recreate the problem.

1) When the app is loaded tab TestPanel1 and TestPanel2.
2) Select "Test Layout 1" in the dropdown
3) Reselect "Test Layout 2" in the dropdown
4) Move the splitter between TestPanel3 and the 2 tabbed panels. This will raise the following error

System.NullReferenceException was unhandled
Message="Object reference not set to an instance of an object."
at Syncfusion.Windows.Forms.Tools.WhidbeyDragProvider.GetMainFormController(Point ptscreen)
at Syncfusion.Windows.Forms.Tools.WhidbeyDragProvider.ProcessMouseMove(DockControllerBase controller, IDraggable ctrl, Point ptscreen)
at Syncfusion.Windows.Forms.Tools.DragSplitterController.HandleMouseMoveImp(MouseButtons button, Point ptclient)
at Syncfusion.Windows.Forms.Tools.DragSplitter.OnMouseMove(MouseEventArgs e)
at System.Windows.Forms.Control.WmMouseMove(Message& m)
at System.Windows.Forms.Control.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 SimpleCode.Form1.Main() in C:\Dev\Test .Net Apps\Docking Manager\Form1.cs:line 242
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()

Docking Manager0.zip

Murugan [Syncfusion]
Replied On June 8, 2007 05:29 PM UTC

Hi Shane,

We regret for the inconvenience caused. This is a known issue in v4.4. This issue has been resolved in our latest version. Could you please upgrade to our latest version v5.1? Please refer to the below link for latest release details


Thank you for your interest in Syncfusion products.

Murugan P.S


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