Wpf Mvvm How to get value from another form?

Question

WPF

I need to call another form from a form and get the value of the key that was pressed on the new form. How to do it.

Answer 1

You have one ViewModel, which you pass from one form to another (set, for example, in the DataContext). By pressing a key in the second form, save what you need in the passed ViewModel and automatically this information will become available in the first form.

void button_click(object sender, RoutedEventArgs e)
{
  var form = new Form2(){DataContext = DataContext};
  form.ShowDialog();
}