How to hide a parent form while working on the child form?

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I am making a project that consists of storing employee records through MDI forms..
Now after selecting Add New Button, I want the second child form to be active and the first (parent form)form to be disabled for the time being.

I've tried to use the showdialog() method, but due to its MDI form, its shows an error stating "The form being shown is not a top-level window."
If this is not possible in mdi conditions,
what is it that I can do to execute the same.

Posted 15-Jan-16 20:49pm

Dishi_Gupta

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Maciej Los 16-Jan-16 16:14pm

Why to use MDI? Forget about it!

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OriginalGriff · Answer 1 · 2016-01-15T21:02:00

Solution 1

The error message is right: and MDI child form cannot be modal - which is what the ShowDialog method is there to do.
If you want the main (MDI parent) window to "disappear" while the new window is visible, then it can't be an MDI child window, it must be a regular "top level" window - and then you just do this:

VB.NET

Dim mnf As New MyNewForm()
Hide()
Dim result As DialogResult = mnf.ShowDialog()
Show()

Posted 15-Jan-16 21:02pm

OriginalGriff

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Dishi_Gupta 16-Jan-16 3:34am

Sir is it not possible anyway that this happens alongwith the MDI property? Because the Mdi property condition is necessary for the whole code/project..

OriginalGriff 16-Jan-16 4:17am

It will work fine, provided you don't try to make the new form and MDI child: The code I gave you will work if you don't change it.
If you are trying to add another MDI child instead, just set it's MDIParent to the MDI main form, and use the Show method instead of ShowDialog.