Are you sure you want to cancel?

Hi Warren,

We previously had the same thing with the Finish button and added a new property to control that button's DialogResult but for some reason didn't add the same thing for the Cancel button, which should have been done as well. It's now added for the next maintenance release.

However this related post will tell you how to do a workaround for now until the next release:
http://www.actiprosoftware.com/Support/Forums/ViewForumTopic.aspx?ForumTopicID=1382

Thanks - it looks like the workaround will take care of the issue for me.

I am now processing two events: the Wizard's CancelButtonClick() and the Dialog's FormClosing(). Between the two events, I can now ask "are you sure" if the user closes the form with either the Cancel button or by clicking the close "X" in the corner of the window.

In the CancelButtonClick handler, I display the "are you sure" dialog, then set DialogResult = DialogResult.None if the user chooses to stay in the wizard.

In the Dialog's FormClosing handler, I display the same "are you sure" dialog if the DialogResult is not equal to DialogResult.OK. This allows the "are you sure" dialog to be skipped if this form was closed due to a Finish button click.

I'm finally trying to make use of this new CancelButtonDialogResult feature to prevent the user from closing the wizard, but I'm obviously not understanding how you intended this feature to fix my original problem.

I am providing an event handler for Wizard.CancelButtonClick. I warn the user that his changes will be discarded and ask if he's sure he wants to cancel. If he answers No, I set CancelButtonDialogResult = DialogResult.None, otherwise I set it to DialogResult.Cancel. Either way, the wizard closes, which is obviously NOT what I'm trying to accomplish.

I'm also providing an event handler for the WizardDialog's FormClosing event which should prompt the user if he closes the WizardDialog using the "X" in the upper right corner. It works similarly, the major difference being that the EventArgs passed to WizardDialog.FormClosing has a Cancel property. The big problem here is that if the user clicks the Cancel button and the dialog starts to close, then the FormClosing event handler asks again "Are you sure?"

How do I prevent the wizard from closing when the user clicks the Cancel button, then says "No - I don't really want to cancel"? (It really seems to me that the EventArgs for Wizard.CancelButtonClick needs to have a Cancel property that signals that the wizard should not close.)

Hi Warren,

If you are doing custom cancel validation code, you should set CancelButtonDialogResult = DialogResult.None and leave it that way. Then in your CancelButtonClick event, you can set the Form.DialogResult property instead. If that doesn't close the Form even when you set it to DialogResult.Cancel then you might also have to call Form.Close in that situation. But if you leave it DialogResult.None then the Form will not close.

I hope that explains it.