Use EventHandler with AddressOf : AddressOf « Event « VB.Net Tutorial






  1. VB.Net Tutorial
  2. Event
  3. AddressOf
Module Module1

  Sub AHandler(ByVal o As Object, ByVal e As System.EventArgs)
    Console.WriteLine("handler")
  End Sub


  Sub Main()
    Dim TodayDate As DateTime = Today()
    Console.WriteLine(TodayDate)

    Dim MyArray() As Double = {3.159, System.Math.Sqrt(2)}
    Console.WriteLine(MyArray(1))

    Dim MyHandler As EventHandler ' = AddressOf AHandler
    MyHandler(Nothing, Nothing)

    Try
      Dim MyException As Exception = New Exception("Raise an exception!")
      Throw MyException
    Catch e As Exception
      Console.WriteLine(e.StackTrace())
    End Try
  End Sub
End Module

11/05/2007 12:00:00 AM
1.4142135623731

Unhandled Exception: System.NullReferenceException: Object reference not set to an instance of an ob
ject.
   at Module1.Main()




11.3.AddressOf
11.3.1.AddressOf operator
11.3.2.Use EventHandler with AddressOf
11.3.3.AddHandler and AddressOfAddHandler and AddressOf