CODEWITHSUNDEEP
c#forms
Ehsan Akbar
Ehsan Akbar

Reputation: 7301

form closing An unhandled exception of type 'System.ComponentModel.Win32Exception' occurred in System.Windows.Forms.dll

Hi I have a form and i want to open another form when user close the current form as you can see here :

private void frmDashboard_FormClosing(object sender, FormClosingEventArgs e)
        {
            this.Close();
            frmConcerns a = new frmConcerns();
            a.ShowDialog();
        }

But when i click on the close button i get this error :

An unhandled exception of type 'System.ComponentModel.Win32Exception' occurred in System.Windows.Forms.dll

Additional information: Error creating window handle.

Upvotes: 1

Views: 2901

Answers (1)

Thorsten Dittmar
Thorsten Dittmar

Reputation: 56697

this.Close() closes the current form - which is actually being done right now already because otherwise the FormClosing event wouldn't have been invoked. Remove that line.

Also, if you want to show a dialog as a modal window, you should provide the parent form, so instead of calling a.ShowDialog(); rather call a.ShowDialog(this);.

If the error is still there I can assure you that the code you've shown will be correct after the modifications I've suggested - I've done similar things before. In that case the error must occur in other parts of your code you've not shown us.

Upvotes: 1

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