c# - inheritance WPF layout - Window from Window

Question

I have problem with my inheritance of \'Window\', I don\'t understand what the problem is?

I think, my layout (MediaLibrary.xaml) have to inherit of MainWindow... But I

Answer 1

You can not subclass a visual .XAML class such as you are attempting. Only classes that are built in your C# code can be inherited.

Now, that said, you can create your own visual theme of a window with respect to style, colors, etc (or do in code), then build your classes upon that class from code.

public class MyWindow : Window
{
   public class MyWindow()
   {
      SomeProperty = SomeValue;
   }

   protected void SomeCustomFunction(int AnyParameter)
   {
      SomethingCommon = AnyParameter;
   }

   etc...
}

Build your project so this class is then known/available for derivation purposes.

Now, when you create your .XAML-based Window, let it create the default based on "Window". Then, modify both your .XAML.cs and your .cs versions and change the reference to YOUR "MyWindow" class something like...

From

in the XAML, you will also need to add reference to your class library namespace, something like... the xmlns if your window class is in another project/namespace. The "myLib" is like an "alias" to that class library so it can be used within the rest of the XAML, it knows how/where to resolve the class references.

In the .cs code, change

public partial class blah : Window

to

public partial class blah : MyWindow

If your class library is in the same namespace, you should be good to go. If not, you can either add a

using MyLibrary;   before the public partial class -- OR

public partial class blah : MyLibrary.MyWindow