Question

I have a method in my Mainwindow, i want to call this method in an other usercontrol.
I dont use a static method because my MainWindow is not Static, and I can’t make it static.
So I figured out to use this, but I dont know what comes behind the AS and I dont know if I can put a method is VAR?
I also can’t make another MainWindow instance because that gives me a Stackoverflow exception.
How can I solve this?

var myMethode= mainWindow.FindName("MyMethode") as (should be a methode);
if (myMethode!= null) 
{  
    //My code
}

Answer 1

You can define a static method on a class that is not static.

For example:

static void Main()
{
    Foo foo = new Foo();
    Foo.DoSomething();
    foo.DoSomethingElse();
}

public class Foo
{
    public static void DoSomething()
    {
        Console.WriteLine("DoSomething");
    }

    public void DoSomethingElse()
    {
        Console.WriteLine("DoSomethingElse");
    }
}

But wouldn’t it be a better solution to pass the MainWindow as a parameter into the User Control? So the user controls knows to which window it belongs and can access a function on it? (even better to declare an interface for this and pas the interface around).

This would look like:

public interface IWindow
 {
     string SomeWindowActivity();
 }

 public class MyUserControl
 {
     public IWindow Window { get; set; }

     public void SomeActionOnUserControl()
     {
         string data = Window.SomeWindowActivity();
     }
 }

 public class MainWindow : IWindow
 {
     MyUserControl MyUserControl { get; set; }

     public MainWindow()
     {
         // Link the UserControl to the Window it's one. This can be done trough the 
         // constructor or a property
         MyUserControl.Window = this;
     }

     public string SomeWindowActivity()
     {
         // Some code...

         return "result";
     }
 }