MDI and OutOfMemoryException

microsoft.public.dotnet.framework

7 Mar 2007 4:03 AM

kiranreddyd

Hi,

I have this code that makes the form as an MDIChild:

            chartWindowController.GetForm().MdiParent =
_expertTradeMainFrm;
            chartWindowController.GetForm().WindowState =
FormWindowState.Normal;
            chartWindowController.GetForm().Show();

The above code snippet throws exception when Show() is called:

Message "Object reference not set to an instance of an object."

StackTrace "   at System.Windows.Forms.ToolTip.CreateHandle()\r\n
at
System.Windows.Forms.ToolTip.get_Handle()\r\n   at
System.Windows.Forms.ToolTip.WmWindowPosChanging(Message& m)\r\n   at
System.Windows.Forms.ToolTip.WndProc(Message& msg)\r\n   at
System.Windows.Forms.ToolTip.ToolTipNativeWindow.WndProc(Message& m)\r
\n
at System.Windows.Forms.NativeWindow.DebuggableCallback(IntPtr hWnd,
Int32
msg, IntPtr wparam, IntPtr lparam)\r\n   at
Microsoft.Win32.SafeNativeMethods.MessageBox(HandleRef hWnd, String
text,
String caption, Int32 type)\r\n   at
System.Diagnostics.AssertWrapper.ShowMessageBoxAssert(String
stackTrace,
String message, String detailMessage)\r\n   at
System.Diagnostics.DefaultTraceListener.Fail(String message, String
detailMessage)\r\n   at
System.Diagnostics.DefaultTraceListener.Fail(String
message)\r\n   at System.Diagnostics.TraceInternal.Fail(String
message)
\r\n
at System.Diagnostics.Debug.Fail(String message)\r\n   at
CimsFramework.CimsSecurity.CmsUsrDataSheetSubModule.GetDataEntryInfo()
in
D:\\CIMS.NET\\CimsFramework\\CimsSecurity.cs:line 4127"

But when the same is not a MDIChild then it works fine i.e., if I
comment the line
chartWindowController.GetForm().MdiParent = _expertTradeMainFrm, then
the application works fine.

I have Visual Team Edition 2005 for Developers + Windows XP Sp2.

Can anyone let me know why this is happening or how to fix it. Thanks
in advance.

Regards
Kiran