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2011-10-27T17:58:16.143
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As many have pointed out, passing an event to a method is either not possible or not simple. <ol> <li>Please clarify, but I suspect your intended usage will look something like: <pre><code>void Register() { var super = new SuperHandler(); //not valid syntax: super.HandleEvent(MyEvent1); super.HandleEvent(MyEvent2); super.HandleEvent(MyEvent3); super.HandleEvent(MyEvent4); } </code></pre> You can accomplish this simply by making your intended generic event handlers accessible publicly (or internally, if you desire): <pre><code> public static class GenericHandler { public static void HandleAnyEvent(object sender, EventArgs e) { //handle } } public class SomeClass { void RegisterEvents() { var r = new EventRaiser(); r.ImportantThingHappened += GenericHandler.HandleAnyEvent; } } </code></pre> In this example my catch-all handler is in a static class, but you can just as well use a non-static class. Also, I see that in your example you have made the method generic (TEventArgs). Because all EventHandler derivatives (such as CancelEventHandler) match the base EventHandler, you do not need to involve generics (nor would it be helpful).</li> <li>If the registration logic is complex or you must keep the EventHandler private, consider using Interface Events. This may not meet your intended goal of reducing the amount of code, but it will allow you to create a class that can predictably handle all of the events of a specific type. <pre><code>interface IRaiseEvents { event EventHandler ConnectionCreated; event EventHandler ConnectionLost; } public class SuperHandler { void RegisterEvents(IRaiseEvents raiser) { raiser.ConnectionCreated += (sender, args) => Console.WriteLine("Connected."); raiser.ConnectionLost += (sender, args) => Console.WriteLine("Disconnected."); } } </code></pre></li> </ol>
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1. POHow can I pass an event to a function in C#?
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1. USKevin McCormick
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