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Closing child form in MDI application

Posted on 2006-07-11
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Last Modified: 2012-05-05
Hi all,

I have a MDI application, in child form class I write event handler to handle FormClosing event. In the event handler I show a message box to ask user to save their changes to the document. I write code to do the task as follow. If user selects Yes the document will be save and the form will be closed, if user selects No then form will be close without saving document, and if user select Cancel the Cancel property of FormClosingEventArgs will be set to true and do nothing. But when I run my application, when message is promted I select No in some form and select Cancel at the message of last form. If it is correct then there is one child form in my application but in my application, all child form still remaining and not closed.

Please tell me why and let me know the way to solve this problem.
thanks and best regard.
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Question by:ncsvietnam
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Anandavally_P earned 500 total points
ID: 17089304
Try this,

This is the closing event of the child form.

 private void Form2_FormClosing(object sender, FormClosingEventArgs e)
 {
      DialogResult result = MessageBox.Show(this, "Do you want to close", "Confirm",
                                                                 MessageBoxButtons.YesNoCancel);
      // If the result is yes then save the form and the form is closed
       if (result == DialogResult.Yes)
       {
            MessageBox.Show("save the form");                
       }
       // If the result is no dont save the form and the form is closed
       else if (result == DialogResult.No)
       {
            MessageBox.Show("Do not save the form");                
       }
      // If the result is cancel then set the argument to cancel value to true
       else if (result == DialogResult.Cancel)
       {
            e.Cancel = true;
        }                  
 }

I think you would have called the function this.Close() after saving the form. It will again call the form closing event and eventually you will end up in keeping the form open.

Regards,
Anandavally P
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