what is the equivalent of visual basic withevents and handles in C#

Question

I try to convert a Visual Basic (VB) project to C# and I have no idea how to change some of codes below,

In a windows form a field and a Timer object defined like this;

Public WithEvents tim As New Timer
...
Private Sub Timer1_Tick(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles tim.Tick
End Sub
...

How to rewrite this lines in C#?

If your rewriting this into a new c# winforms project, you presumably have a designer window, just add a new timer and double click it. — Sayse, Jul 29 '15 at 07:34
There is no direct equivalent for WithEvents in C#. It relies on compiler magic in the VB.NET compiler that the C# compiler does not have. First convert the VB.NET code to use the AddHandler statement instead, then you'll have a very easy time converting it to C#, a machine can do it. — Hans Passant, Jul 29 '15 at 08:20

score 7 · Accepted Answer · edited Oct 30 '18 at 19:08

In C# you enrol an EventHandler by registering a method delegate with the event using the += operator as follows:

public Timer tim = new Timer();
tim.Tick += Timer1_Tick;

private void Timer1_Tick(object sender, EventArgs e)
{
   // Event handling code here
}

This works because the Tick event of the Timer class implements an Event as follows:

public event EventHandler Tick

and EventHandler is a method delegate with signature:

public delegate void EventHandler(
    Object sender,
    EventArgs e
)

which is why any method that conforms to the EventHandler signature can be used as a handler.

what is the equivalent of visual basic withevents and handles in C#

1 Answers1