Application crashes using Save File Dialog from a Mdi Child

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  • Start date Start date
G

Guest

I have an application with several Mdi child forms. In one child, I have an
option to export records in a DataGrid to a text file using the
SaveFileDialog to get the file and path.

When exporting, the opening and saving of the SaveFileDialog works fine.
Afterwards, as soon as I do anything with the Mdi Parent like resize the Mdi
Parent form, the application crashes and there is a null reference exception
thrown from forms.dll.

Has anyone experienced this and are there any suggested ways around this?

Appreciated in advance.
 
Hello,
Can you provide us with the exception's stack trace. I have never
experience the problem you mentioned, but the stack trace will help to
understand the problem.

Bye!
Maqsood Ahmed [MCP C#,SQL Server]
Kolachi Advanced Technologies
http://www.kolachi.net
 
Absolutely,

The stack trace is as follows along with the loaded assemblies:

************** Exception Text **************
System.NullReferenceException: Object reference not set to an instance of an
object.
at System.Windows.Forms.UnsafeNativeMethods.DefFrameProc(IntPtr hWnd,
IntPtr hWndClient, Int32 msg, IntPtr wParam, IntPtr lParam)
at System.Windows.Forms.Form.DefWndProc(Message& m)
at System.Windows.Forms.Control.WndProc(Message& m)
at System.Windows.Forms.ScrollableControl.WndProc(Message& m)
at System.Windows.Forms.ContainerControl.WndProc(Message& m)
at System.Windows.Forms.Form.WmSysCommand(Message& m)
at System.Windows.Forms.Form.WndProc(Message& m)
at System.Windows.Forms.ControlNativeWindow.OnMessage(Message& m)
at System.Windows.Forms.ControlNativeWindow.WndProc(Message& m)
at System.Windows.Forms.NativeWindow.Callback(IntPtr hWnd, Int32 msg,
IntPtr wparam, IntPtr lparam)


************** Loaded Assemblies **************
mscorlib
Assembly Version: 1.0.5000.0
Win32 Version: 1.1.4322.573
CodeBase: file:///c:/winnt/microsoft.net/framework/v1.1.4322/mscorlib.dll
----------------------------------------
StarAnalytics.SIS
Assembly Version: 2.0.2040.29917
Win32 Version: 2.0.2040.29917
CodeBase:
file:///D:/SIS/SIS%20Platform/StarAnalytics.SIS/bin/Release/StarAnalytics.SIS.exe
----------------------------------------
System.Windows.Forms
Assembly Version: 1.0.5000.0
Win32 Version: 1.1.4322.573
CodeBase:
file:///c:/winnt/assembly/gac/system.windows.forms/1.0.5000.0__b77a5c561934e089/system.windows.forms.dll
----------------------------------------
System
Assembly Version: 1.0.5000.0
Win32 Version: 1.1.4322.573
CodeBase:
file:///c:/winnt/assembly/gac/system/1.0.5000.0__b77a5c561934e089/system.dll
----------------------------------------
System.Drawing
Assembly Version: 1.0.5000.0
Win32 Version: 1.1.4322.573
CodeBase:
file:///c:/winnt/assembly/gac/system.drawing/1.0.5000.0__b03f5f7f11d50a3a/system.drawing.dll
----------------------------------------
StarAnalytics.Utils
Assembly Version: 2.0.2040.29908
Win32 Version: 2.0.2040.29908
CodeBase:
file:///D:/SIS/SIS%20Platform/StarAnalytics.SIS/bin/Release/StarAnalytics.Utils.DLL
----------------------------------------
System.Data
Assembly Version: 1.0.5000.0
Win32 Version: 1.1.4322.573
CodeBase:
file:///c:/winnt/assembly/gac/system.data/1.0.5000.0__b77a5c561934e089/system.data.dll
----------------------------------------
StarAnalytics.SelectionManager
Assembly Version: 2.0.2040.29913
Win32 Version: 2.0.2040.29913
CodeBase:
file:///D:/SIS/SIS%20Platform/StarAnalytics.SIS/bin/Release/StarAnalytics.SelectionManager.DLL
----------------------------------------
System.Xml
Assembly Version: 1.0.5000.0
Win32 Version: 1.1.4322.573
CodeBase:
file:///c:/winnt/assembly/gac/system.xml/1.0.5000.0__b77a5c561934e089/system.xml.dll
----------------------------------------
Accessibility
Assembly Version: 1.0.5000.0
Win32 Version: 1.1.4322.573
CodeBase:
file:///c:/winnt/assembly/gac/accessibility/1.0.5000.0__b03f5f7f11d50a3a/accessibility.dll
----------------------------------------
System.Data.OracleClient
Assembly Version: 1.0.5000.0
Win32 Version: 1.1.4322.573
CodeBase:
file:///c:/winnt/assembly/gac/system.data.oracleclient/1.0.5000.0__b77a5c561934e089/system.data.oracleclient.dll
----------------------------------------
System.EnterpriseServices
Assembly Version: 1.0.5000.0
Win32 Version: 1.1.4322.573
CodeBase:
file:///c:/winnt/assembly/gac/system.enterpriseservices/1.0.5000.0__b03f5f7f11d50a3a/system.enterpriseservices.dll
----------------------------------------
StarAnalytics.Client
Assembly Version: 1.0.2040.29912
Win32 Version: 1.0.2040.29912
CodeBase:
file:///d:/sis/sis%20platform/staranalytics.sis/bin/release/staranalytics.client.dll
----------------------------------------
StarAnalytics.ScheduleManager
Assembly Version: 2.0.2040.29915
Win32 Version: 2.0.2040.29915
CodeBase:
file:///d:/sis/sis%20platform/staranalytics.sis/bin/release/staranalytics.schedulemanager.dll
----------------------------------------
StarAnalytics.LogViewer
Assembly Version: 2.0.2040.18457
Win32 Version: 2.0.2040.18457
CodeBase:
file:///d:/sis/sis%20platform/staranalytics.sis/bin/release/staranalytics.logviewer.dll
----------------------------------------
StarAnalytics.EmailManager
Assembly Version: 2.0.2040.18457
Win32 Version: 2.0.2040.18457
CodeBase:
file:///d:/sis/sis%20platform/staranalytics.sis/bin/release/staranalytics.emailmanager.dll
----------------------------------------
StarAnalytics.Connections
Assembly Version: 2.0.2040.29911
Win32 Version: 2.0.2040.29911
CodeBase:
file:///D:/SIS/SIS%20Platform/StarAnalytics.SIS/bin/Release/StarAnalytics.Connections.DLL
----------------------------------------
MTGCCombobox
Assembly Version: 1.0.0.0
Win32 Version: 1.0.0.0
CodeBase:
file:///D:/SIS/SIS%20Platform/StarAnalytics.SIS/bin/Release/MTGCCombobox.DLL
----------------------------------------
Microsoft.VisualBasic
Assembly Version: 7.0.5000.0
Win32 Version: 7.10.3052.4
CodeBase:
file:///c:/winnt/assembly/gac/microsoft.visualbasic/7.0.5000.0__b03f5f7f11d50a3a/microsoft.visualbasic.dll
----------------------------------------

Thanks for the help

Maqsood Ahmed said:
Hello,
Can you provide us with the exception's stack trace. I have never
experience the problem you mentioned, but the stack trace will help to
understand the problem.

Bye!
Maqsood Ahmed [MCP C#,SQL Server]
Kolachi Advanced Technologies
http://www.kolachi.net
Click to expand...
 
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