How to add a delegate to an interface C#

Question

I need to have some delegates in my class.

I\'d like to use the interface to \"remind\" me to set these delegates.

How to?

My class look like this:

Answer 1

The interface inherited within your derived class will remind you to define and link up the stuff you declared in it.

But you may also want to use it explicitly and you will still need to associate it to an object.

For example using an Inversion of Control pattern:

class Form1 : Form, IForm {
   public Form1() {
     Controls.Add(new Foo(this));
   }

   // Required to be defined here.
   void IForm.Button_OnClick(object sender, EventArgs e) {
     ...
     // Cast qualifier expression to 'IForm' assuming you added a property for StatusBar.
     //((IForm) this).StatusBar.Text = $"Button clicked: ({e.RowIndex}, {e.SubItem}, {e.Model})";
   }
 }

You can try something like this.

interface IForm {
  void Button_OnClick(object sender, EventArgs e);
}


class Foo : UserControl {
  private Button btn = new Button();

  public Foo(IForm ctx) {
     btn.Name = "MyButton";
     btn.ButtonClick += ctx.Button_OnClick;
     Controls.Add(btn);
  }
}