[C#] Custom event args for the Click event of a menu item

[PaulWerelds]

Hi there,

Let me start off by saying that I'm working in Visual Studio 2005, using Visual C#.
I've been trying to pass custom Event arguments to the Click event of a ToolStripMenuItem, but I can't figure it out.

I'm probably just doing it all wrong, hence why I'm coming here for help.

What I've done is the following:

First, I create a custom eventargs class

public class EventArgs<T> : EventArgs
  {
    public EventArgs(T value)
    {
      argValue = value;
    }
 
    private T argValue;
    public T Value
    {
      get { return argValue; }
    }
  }
 

For testing purposes, my eventhandler looks like this:

void MenuItem_Click(object sender, EventArgs<string> e)
  {
    MessageBox.Show("YAY!");
  }
 

Then, to call the eventhandler, I do this:

Item.Click += new EventHandler<EventArgs<string>>(MenuItem_Click)(this, new EventArgs<string>("test"));

All of this results in the following error:

Cannot implicitly convert type 'void' to 'System.EventHandler'
 

My guess is that I'm doing something wrong at the event assignment, but I've tried so many things now, that I'm asking for help.


What am I doing wrong?


PS: Apologies for any flaws in my English, it's not my native language, so I might've made some weird sentences.

[Plater]

I am pretty sure you have to use the definition for the delegate defined for the event. I don't believe you can just "change" them without inheriting the class and adding your own event with your own delegate.
Especially since you will never be able to pass your own arguments into the handler since you can't "call" the event the way object itself triggers the event. (Unless you can do that inheriting thing)

[PaulWerelds]

How exactly would this work with a delegate then?
Sorry for the silly question, but I've never really used delegates.

On a sidenote though, I thought it was possible to alter Eventargs to pass your own data through.

[Plater]

It's very possible to have a variable declared that can be used both inside and outside of your event handler if you wish.

This class contains no event data; it is used by events that do not pass state information to an event handler when an event is raised. If the event handler requires state information, the application must derive a class from this class to hold the data.

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