Set an Event Handlers From a String

Question

I have a String like this:

string myEventName = "myButton_Click";

Then I need to create an EventHandlers for the click of some button, but passing the String as a parameter, the "myButton_Click" method already exists:

private void myButton_Click (object sender, RoutedEventArgs e) { }

Is this possible, using reflection or other kind of trick?

Thanks.

This seems like a complicated way of setting a handler. Is there a reason why you have the name of a method in a string variable? — LBushkin, Dec 22 '09 at 19:44

score 1 · Answer 1 · answered Dec 22 '09 at 18:06

Yes, you can use reflection. It's fairly ugly, but it should work:

// Here, "target" is the instance you want to use when calling
// myButton_Click, and "button" is the button you want to
// attach the handler to.
Type type = target.GetType();
MethodInfo method = type.GetMethod(myEventName,
    BindingFlags.Instance | BindingFlags.NonPublic);
EventHandler handler = (EventHandler) Delegate.CreateInstance(
    typeof(EventHandler), target, method);
button.Click += handler;

You'll need a lot of error checking of course, but that's the basic procedure. By the way, your variable would be better named as "myHandlerName" or something similar - it's not the event itself.

+1 for bringing up naming convention ... it's always helpful to know how we should be naming things — Chris Nicol, Dec 22 '09 at 18:09

score 0 · Answer 2 · edited May 23 '17 at 10:27

0

You can do this by using reflection. Take a look at these 2 links to give you all that you need to know:

http://msdn.microsoft.com/en-us/library/ms228976.aspx

C# Dynamic Event Subscription

edited May 23 '17 at 10:27

Community

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answered Dec 22 '09 at 18:07

Gabriel McAdams

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Set an Event Handlers From a String

2 Answers2