I've recently created these two (unrelated) methods to replace lots of boiler-plate code in my winforms application. As far as I can tell, they work ok, but I need some reassurance/advice on whether there are some problems I might be missing.
(from memory)
static class SafeInvoker
{
//Utility to avoid boiler-plate InvokeRequired code
//Usage: SafeInvoker.Invoke(myCtrl, () => myCtrl.Enabled = false);
public static void Invoke(Control ctrl, Action cmd)
{
if (ctrl.InvokeRequired)
ctrl.BeginInvoke(new MethodInvoker(cmd));
else
cmd();
}
//Replaces OnMyEventRaised boiler-plate code
//Usage: SafeInvoker.RaiseEvent(this, MyEventRaised)
public static void RaiseEvent(object sender, EventHandler evnt)
{
var handler = evnt;
if (handler != null)
handler(sender, EventArgs.Empty);
}
}
EDIT: See related question here
UPDATE
Following on from deadlock problems (related in this question), I have switched from Invoke to BeginInvoke (see an explanation here).
Another Update
Regarding the second snippet, I am increasingly inclined to use the 'empty delegate' pattern, which fixes this problem 'at source' by declaring the event directly with an empty handler, like so:
event EventHandler MyEventRaised = delegate {};
