[RESOLVED] delegate callback problem...stack overflow

[Sneeden]

I am coding a user control. Within the user control I am trying to define a callback. Here is what I have:

//class var (create delegate)
private delegate void sockDelegate(string s);

//in constuctor (init delegate variable)
frmMain fMain = new frmMain();
sockDelegate del = new sockDelegate(fMain.socketClicked);

//when the socket is clicked (button event handler). Call the callback function on frmMain
del("the socket was clicked");


The problem is in the constructor. I have to create an instance of frmMain, but it has an instance of this user control so:
frmMain loads and inits the user control which loads a frmMain which loads a user control whick loads a frmMain....etc....etc until the stack is full.

How can I assign the callback? I would like a code example of a function in the user control that will assign the callback, taking the function as a passed parameter. Something like:

public bool assignCallback(functionName, formInstance){...}

Please help me!

[Mike Hildner]

How about if your user control raises an event, and the main form registers with the event? This way, the control doesn't have to know about the main form.

Mike

[Sneeden]

As long as the control is totally generic. I don't want a user of it to have to edit the code at all.

How would I do this? Can you give me a generic example?

[MrPolite]

look at this thread
http://www.vbforums.com/showthread.php?t=357956

seems like you want events

[Sneeden]

I was able to solve this by implementing an interface to the container form:

// Include this interface in your container form:
public interface ICallBack
{
 	 void callBack(string socket);
}



// Then have your container form inherit the interface:
// public class frmMain : System.Windows.Forms.Form , ICallBack
{
 	 ...
}

// Now since you are using an interface, you must include the function "callBack" in your container form. 
public void callBack(string socket)		
{
       Console.WriteLine(socket);
}


// Now in your event handler on the control:
private void sockClickHand(Object sender, System.EventArgs e)
{
	ICallBack cb = this.Parent as ICallBack;
	if(cb!=null)
		cb.callBack(sender.ToString());
}