WPF: Disable the window on the background

Question

Hello, I have a window that opens another window. I want that when this window it's opened i can't do anything on the parent window. (I'm not allowed to click buttons for example) How I can do that?

Thanks.

Answer 1

You want a modal window instead of a modeless window. A modal window means that the parent window is not usable while the child window is open.

You can open a modal window with ShowDialog.

You can open a modeless window with just Show.

Answer 2

You need to call the ShowDialog method instead of Show to show the second window as a modal dialog.