Passing arguments to an event handler

南楼画角 提交于 2019-11-29 21:27:08

Yes, you could define the event handler as a lambda expression:

void Test(string name, string age)
{
  Process myProcess = new Process(); 
  myProcess.Exited += (sender, eventArgs) =>
    {
      // name and age are accessible here!!
      eventHandled = true;
      Console.WriteLine("Process exited");
    }

}

If you want to access username and age, you should create handler which uses custom EventArgs (inherited from EventArgs class), like following:


public class ProcessEventArgs : EventArgs
{
  public string Name { get; internal set; }
  public int  Age { get; internal set; }
  public ProcessEventArgs(string Name, int Age)
  {
    this.Name = Name;
    this.Age = Age;
  }
}

and the delegate

public delegate void ProcessHandler (object sender,  ProcessEventArgs data);
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