WPF popup staysopen=false still keep the popup open while clicking outside

Question

my problem here is I made a listbox inside the popup, and set the popup\'s staysopen=false. But each time popup box pops, I have to click something inside the popup(like sel

Answer 1

You should create a dependency property in your view model or control for "IsPopupOpen" as shown below to manage state of the popup. Then you can bind both the ToggleButton "IsChecked" and popup "IsOpen" to that DP.

Also on your ToggleButton, set "Focusable=false" and "IsThreeState=false"

    public bool IsDropDownOpen
    {
     get { return (bool)GetValue(IsDropDownOpenProperty); }
     set { SetValue(IsDropDownOpenProperty, value); }
    }        

    public static readonly DependencyProperty IsDropDownOpenProperty =
          DependencyProperty.Register("IsDropDownOpen", typeof(bool), typeof(Window), new UIPropertyMetadata(false));

Good luck!