C#•8mo ago

Inheriting a base window class in WPF

I have a couple of windows that use the same CloseWindow, MinimizeWindow, and WindowMouseDown functions that are implemented the same This feels kind of a bad practice, so I tried implementing a base function for window that has all 3 of those functions and inheriting it in all of those windows However it gave me a lot of problems in using the base Window functions (e.g. Show and Close) outside the class, and much more errors Does anybody know a better way to address this problem? This is the class I tried using as a base class:

C#
namespace Client
{
    public abstract class TriviaClientWindow : Window
    {
        private void Window_MouseDown(object sender, MouseButtonEventArgs e)
        {
            if (e.LeftButton == MouseButtonState.Pressed)
            {
                DragMove();
            }
        }
        private void CloseWindow(object sender, RoutedEventArgs e)
        {
            ((App)Application.Current).StopMusic();
            Thread.Sleep(50);
            Close();
        }
        private void MinimizeWindow(object sender, RoutedEventArgs e)
        {
            this.WindowState = WindowState.Minimized;
        }
    }
}

C#
namespace Client
{
    public abstract class TriviaClientWindow : Window
    {
        private void Window_MouseDown(object sender, MouseButtonEventArgs e)
        {
            if (e.LeftButton == MouseButtonState.Pressed)
            {
                DragMove();
            }
        }
        private void CloseWindow(object sender, RoutedEventArgs e)
        {
            ((App)Application.Current).StopMusic();
            Thread.Sleep(50);
            Close();
        }
        private void MinimizeWindow(object sender, RoutedEventArgs e)
        {
            this.WindowState = WindowState.Minimized;
        }
    }
}

6 Replies

SpReeD•8mo ago

What kind of errors do you encounter?

MashmoOP•8mo ago

There is a window that wont allow me to inherit the class since the .g.i.cs file inherits System.Windows.Window and i cant change that namespace Client {

C#
  /// <summary>
    /// MainMenu
    /// </summary>
    public partial class MainMenu : System.Windows.Window, System.Windows.Markup.IComponentConnector {
        ...
        }

C#
  /// <summary>
    /// MainMenu
    /// </summary>
    public partial class MainMenu : System.Windows.Window, System.Windows.Markup.IComponentConnector {
        ...
        }

SpReeD•8mo ago

Have you changed the XAML accordingly?

MashmoOP•8mo ago

How so?

SpReeD•8mo ago

If your C# code inherits from anything other than Window you need to change it in XAML as well. The g.i.cs is auto-generated. I assume your C# class definition looks like

public partial class MainWindow : TriviaClientWindow

public partial class MainWindow : TriviaClientWindow

So your XAML need to look like this:

<cl:TriviaClientWindow x:Class="Views.MainWindow"
  xmlns:cl="clr-namespace:Client"
...>

<cl:TriviaClientWindow x:Class="Views.MainWindow"
  xmlns:cl="clr-namespace:Client"
...>

MashmoOP•8mo ago

Got it, thanks

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Inheriting a base window class in WPF