Question

I was wondering if there was a way to close a window when a property in the view model changes. In my situation I have a login window with an Ok button bound to a LoginCommand so that the function Login executes when Ok is clicked. If the login is successful, I want the window to close.

Now I know I could do this by adding an event handler on my button, which calls a function like this:

private void Button_Click(object sender, RoutedEventArgs e)
{
  DatabaseCredentialsViewModel vm = (this.DataContext as DatabaseCredentialsViewModel);
  vm.Login();

  if (vm.LoginSuccessful)
  {
    this.Close();
  }
}

But I was wondering if there was a way to close the window when LoginSuccessful property changes without having an event handler on my button (I like working only with command binding and not having event handlers on Click event).

Thank you

Answer 1

Here’s a similar question, which filled my need.

Basically, you use an attached property for your window, which binds to a bool? property on your VM. When the VM property is set to something non-null, the attached property sets the Window’s DialogResult, which will automatically close the window.