Question

I have two event handlers wired up to a button click in a Windows form like so:

this.BtnCreate.Click += new System.EventHandler(new RdlcCreator().FirstHandler);
this.BtnCreate.Click += new System.EventHandler(this.BtnCreate_Click);

both are being called correctly.

However is it possible within FirstHandler() to prevent BtnCreate_Click() being executed? Something like:

void FirstHandler(object sender, EventArgs e)
{
   if (ConditionSatisfied)
     //Prevent next handler in sequence being executed

}

I know I could just unsubscribe the event, but can this be done programmatically (from within the method)?

Answer 1

As far as I know there is no solution for this. That’s because there is no guarantee for the order in which the event handlers are called when the event happens.

Because of that you are not supposed to rely on their order in any way.