Working with events

[stonee74]

Hi there, I would like to notify my app if a socketconnection is broken. I tried to use a self created event, with wich i want to notify an upper class in such a case. The problem is i receive a unhandled exception of type 'System.MissingMethodException'... Why? What Am i doing wrong and what means this error? Thanks a lot, stonee internal delegate void ConnectionHandler(SocketException se); ............ public class Control { internal event ConnectionHandler OnConnectionProblem; ................ public Control() { OnConnectionProblem+=new ConnectionHandler(ESControl_OnConnectionProblem); .................... catch(SocketException se) { / MessageBox.Show (se.Message ); try { OnConnectionProblem(se); } catch(MissingMethodException mme) { MessageBox.Show(mme.Message+"::"+mme.InnerException); }

[Jim Stewart]

Here's the problem: stonee74 wrote: OnConnectionProblem+=new ConnectionHandler(ESControl_OnConnectionProblem); There's no method ESControl_OnConnectionProblem Here's how I would do it:

// this defines the event delegate
public delegate void ConnectionHandler(object sender, SocketException se);
// this keeps all event arguments
public class ConnectionProblemEventArgs
{
private SocketException m_SocketException;
public ConnectionProblemEventArgs(SocketException se)
{
SocketException = se;
}
public SocketException SocketException
{
get
{ return m_SocketException; }
}
}
public class EsControl
{
// here's the event definition
public event ConnectionHandler ConnectionProblem;

// this raises the event
public virtual void OnConnectionProblem(SocketException se)
{
	if (ConnectionProblem != null)
		ConnectionProblem (this, new ConnectionProblemEventArgs (se));
}

private DoSomethingWithSocket()
{
	try
	{
		...
	}
	catch(SocketException se)
	{
		// raise the event
		OnConnectionProblem (se);
	}
}

}
public class EventListner
{
public EventListner(EsControl esControl)
{
// subscribe to event here
EsControl.ConnectionProblem += new ConnectionHandler (ESControl_ConnectionProblem);
}

private void ESControl\_ConnectionProblem(object sender, ConnectionProblemEventArgs e)
{
	// Handle event here
}

}

α.γεεκ

Fortune passes everywhere.
Duke Leto Atreides

[stonee74]

thanks, I'm sure this will work. I have in my original class a method definition. I still cannot understand the errormessage.. private void ESControl_OnConnectionProblem() { } thanks for all inputs. regards, stonee