cannot use ShowDialog()

Violeta Popa

Hello..I have a form, named "modificare" which i want to be shown in a panel, so I used the Parent property.If i use Show() is ok, but using ShowDialog() generates an error: Form that is not a top-level form cannot be displayed as a modal dialog box. Remove the form from any parent form before calling showDialog. But i need ShowDialog :( how can i fix this pb? thanks.

modificare.TopLevel = false;

modificare.Parent = panel3;

panel3.Controls.Add(modificare);

modificare.ShowDialog();

3 Replies

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Vulpes13y ago
Well, you can still hide a non-modal form i.e. one opened by Show() rather than ShowDialog(), so I can't really see why you can only do what you want by using a modal form.

Can you post the code which you're using to reopen the form at present.
Violeta Popa13y ago
My form is supposed to show in textboxes, the clicked record from datagridview. I've attached a photo to understand better. If i press "Închide" my form is hidding and then if i select another row and open the form again, the infos in the textbox aren't modified, are those showed the first time. And I know that ShowDialog() solves this problem, i've tried with other forms, but parent forms. Hope you understand the explanations :)
Vulpes13y ago
There isn't really a workaround for this.

A modal form needs to be top level so that all other forms in the application can effectively be disabled until the modal form is closed.

If another form were allowed to be the modal form's parent, then disabling the parent would disable all its controls including the modal form.

Is there some particular reason why you need it to be shown in the panel?