How to access WPF MainWindow Controls from my own .cs file

Question

I am a NOVICE and am very much struggling with what seems should be a very simple task. How do I modify a property of a MainWindow TextBlock, from ano

Answer 1

Basically there are more than 2-3 methods. Given method is quite easier to understand & handle. You can access MainWindow controls by following codes (1),(2),(3),(4).

In File: MainWindow.xaml.cs

  public partial class MainWindow
  {
   internal static MainWindow Main; //(1) Declare object as static
   public MainWindow()
    {
        InitializeComponent();
    }

    private void Window_Loaded(object sender, RoutedEventArgs e)
    {
       Main =this; //(2) Defined Main (IMP)
      var AnyClassORWindow=new Class1(); //Initialize another Class
      AnyClassORWindow.ShowValue();
    }
  }

In File: Class1.cs

  internal class Class1 : MainWindow //(3) Inherited
    {
      internal void Display()
        {
           MessageBox.Show(Main.TextBox1.Text); //(4) Access MainWindow Controls by adding 'Main' before it.
         }
     }

Notes:-

1. It's good practice to use code (2) after window LOADED not in CONSTRUCTOR.
2. Code (2) in constructor may leave run-time problems.
3. Another simple method is to use 'ref MainWindow_field' by passing to each class's Constructor OR assign '(MainWindow) Application.Current.MainWindow' to static Main.