How to create and listen for static events in c# — by Steven Lacerda (Morgan Hill, CA)

If you’re planning on firing the event from a static method, or class, then you should make your event static. Here’s an example,

In my account.cs file:

class Account
{
  public delegate void OnDeleteEventHandler(string id, string siteId);
  public static event OnDeleteEventHandler OnDelete;
  public static void Delete(string id, siteId)
  {
    // your regular code here
    // then check to see if any of your code is 
    //listening here, by checking subscribers to the event
    if (OnDelete != null)
    {
      // fire the event
      OnDelete(id, siteId);
    }
  }
}

Then in my other file, let’s call this chatservice.cs:

public class ChatService
{
  // in my constructor, when the instance is created, 
  // I create a listener that's attached to the delegate
  public ChatService()
  {
    Account.OnDelete += (id, siteId) => UserDeleted(id, siteId);
  }
  public UserDeleted(string id, string siteId)
  {
    // do something with event here
  }
}

Voila, that’s all there is to it.

This is by far the best way to keep your code isolated. Imagine, now when OnDelete fires, you could have threads running all over the place, all without having to call the code directly from the Delete method. So, that means account.cs doesn’t rely on any of the other classes in order for it to do it’s job, it just fires the event and chatservice listens.

Don’t be a prisoner to your code, master it!

Solving a problem is as good as those sexual feelings…sometimes, okay, maybe not. Straight from Morgan Hill, CA. Good luck!

By Steven Lacerda

— by Steven Lacerda