How to manually invoke an event?

Question

I have the following line in C#:

_timer.ElapsedTick += _somefunction1; _timer.ElapsedTick += _somefunction2; _timer.ElapsedTick += _somefunction3; 

How to invoke all methods subscribed to _timer.ElapsedTick without specifying the _somefunction ? Somewhere along this pseudo-line

invoke(_timer.ElapsedTick); 

Answer 1

You can't invoke an event which is owned by another type. An event can only be invoked from the inside the class which declares it.

Answer 2

Can it be done using conventional C#? No (as previously stated). But using reflection it is possible. Here is some tested code based on the answer to this MSDN forum thread:

class InvokeFromMe {     public event EventHandler RaiseMe; }  class Program {     static void Main(string[] args)     {         var fromMe = new InvokeFromMe();          fromMe.RaiseMe += fromMe_RaiseMe;         fromMe.RaiseMe += fromMe_RaiseMe1;         fromMe.RaiseMe += fromMe_RaiseMe2;          FireEvent(fromMe, "RaiseMe", null, EventArgs.Empty);     }      static void fromMe_RaiseMe(object sender, EventArgs e)     {         Console.WriteLine("Event Handler 0 Raised");     }     static void fromMe_RaiseMe1(object sender, EventArgs e)     {         Console.WriteLine("Event Handler 1 Raised");     }     static void fromMe_RaiseMe2(object sender, EventArgs e)     {         Console.WriteLine("Event Handler 2 Raised");     }      public static void FireEvent(object onMe, string invokeMe, params object[] eventParams)     {         MulticastDelegate eventDelagate =               (MulticastDelegate)onMe.GetType().GetField(invokeMe,                System.Reflection.BindingFlags.Instance |                System.Reflection.BindingFlags.NonPublic).GetValue(onMe);          Delegate[] delegates = eventDelagate.GetInvocationList();          foreach (Delegate dlg in delegates)         {             dlg.Method.Invoke(dlg.Target, eventParams);         }     }   } 

UPDATE

I'm not familiar with the System.Timer.Timer class, so I'm not sure what is different from my provided example. You could perhaps try something like:

public static void FirePublicEvent(object onMe, string invokeMe, params object[] eventParams) {     MulticastDelegate eventDelagate =           (MulticastDelegate)onMe.GetType().GetField(invokeMe,            System.Reflection.BindingFlags.Instance |            System.Reflection.BindingFlags.Public).GetValue(onMe);      Delegate[] delegates = eventDelagate.GetInvocationList();      foreach (Delegate dlg in delegates)     {        dlg.Method.Invoke(dlg.Target, eventParams);     } }