Question

I have two forms and I am trying to capture an event generated from frmEventGenerate.cs in frmEventReceive.cs.

In this example I can receive the event from frmEventGenerate.cs but not sure how I can catch this in frmEventReceive.cs? frmEventReceive.cs is my startup form which creates frmEventGenerate.cs.

Can someone point me in the right direction, I think I am being stupid!

Thank you

frmEventGenerate.cs:

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;

namespace Events
{
    public delegate void LinkToEventHandler();

    public partial class frmEventGenerate : Form
    {
        public static event LinkToEventHandler Evt;

        public frmEventGenerate()
        {
            InitializeComponent();
            Evt += new LinkToEventHandler(ReceiveEvent);
            SendEvent();
        }

        public static void SendEvent()
        {
            if (Evt != null)
            {
                Evt();
            }
        }

        public void ReceiveEvent()
        {
            System.Console.WriteLine("Received Event - This works ok");
        }
    }
}

frmEventReceive.cs:

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;

namespace Events
{
    public partial class frmEventReceive : Form
    {
        public frmEventReceive()
        {
            InitializeComponent();
            frmEventGenerate frmGen = new frmEventGenerate();
        }

        public void ReceiveEvent()
        {
            System.Console.WriteLine("I want to be able to receive the even here!");
        }

    }
}

Answer 1

In your constructor, after instantiating frmEventGenerate:

frmGen.Evt += ReceiveEvent;

You don’t need new LinkEventHandler(...) any more – as of C# 2, there’s a method group conversion available which you can use to convert from a method group (the name of a method) to a delegate type.

EDIT: I hadn’t seen that your event was static. That suggests you should actually use:

frmEventGenerate.Evt += ReceiveEvent;

… and you don’t need the frmGen variable at all.

However, I would strongly discourage you from this – why do you want the event to be static in the first place? (I’d also urge you to name your types more sensibly – something like “EventGenerator” would be better here, for example. Ignoring the convention that type names should be in Pascal case leads to confusing code.)