Question

Ok so I have built a custom control that handles wysiwyg editing. Essentially on 1 control I have multiple instances of my wysiwyg editor. So one might be for editing, let’s say, a recipe. Another might be for notes for that recipe.

I have a button on my wysiwyg editor that uses an interface to do callbacks to the control that holds them both, so I know on my parent control when the button was clicked. How do I find out which control fired the callback?

Example

Main Form

public partial class MyCustomControl: RecipeControl.ISavedButton {

    private void SaveButton_Clicked(){
        //Do Work but how do I find out which control fired this event?
        //Was it RecipeControl1 or RecipeControl2
    }

}

My Solution

On my recipe control I did this.

private void RecipeSaveButton_Clicked(object sender, EventArgs e){
    if (RecipeSaveButtonListener != null) {
        RecipeSaveButtonListener.RecipeSaveButton_Clicked(this, EventArgs.Empty); //This referring to the control, not the button.
    }
}

On my main control I did this.

private void RecipeSaveButton_Clicked(object sender, EventArgs e){
    if (sender == RecipeControl1){ 

    } else if (sender == RecipeControl2) { 

    }
}

I have implemented both answers and both are very very good. Sorry I can’t accept both of them.

Answer 1

Most event handlers (like a button click) are built with a standard interface to tell you who performed the action. Take a modified version of your “event handler” for the RecipeControl's Button Click event:

 private void SaveButton_Clicked(object sender, EventArgs e){
        //Do Work but how do I find out which control fired this event?
        RecipeControl ctl = sender as RecipeControl;
    }

So when a button is clicked in your RecipeControl, it should fire an event something like:

this.SaveButtonClick(this, EventArgs.Empty);