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VB.Net » Language Basics » DelegateScreenshots 
Delegate with and without parameters
Delegate with and without parameters
 
Imports System
Imports System.Collections


Delegate Sub DelegateWithStringSignature(ByVal S As String)
Delegate Sub DelegateWithNoParam()

public class MainClass

   Shared Sub Main()

        Dim As New CalledClass()
        Dim As New OtherCalledClass()
        Dim BadObject As New ObjectWithNoWriteMessage()
        Dim d1 As DelegateWithStringSignature

        Dim Params() As Object = {"DynamicParam"}

        ' The two following lines are identical
        d1 = New DelegateWithStringSignature(AddressOf c.WriteMessage)

        d1.Invoke("Test")
        d1.DynamicInvoke(Params)

        d1 = AddressOf c.WriteMessage

        d1.Invoke("Test")
        d1.DynamicInvoke(Params)

   End Sub

End Class

Class CalledClass
    Shared Sub SharedMessage(ByVal s As String)
        Console.WriteLine("CalledClass.SharedMessage with parameter: " & s)
    End Sub

    Public Sub WriteMessage(ByVal s As String)
        Console.WriteLine("CalledClass WriteMessage method with parameter: " & s)
    End Sub
End Class

Class OtherCalledClass
    Sub WriteMessage(ByVal s As String)
        Console.WriteLine("OtherCalledClass WriteMessage method with parameter: " & s)
    End Sub
End Class

Class ObjectWithNoWriteMessage
    Sub BadWriteMessage()

    End Sub
End Class

           
         
  
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4.Register Delegates and call themRegister Delegates and call them
5.Simple Delegate DemoSimple Delegate Demo
6.Sort DelegateSort Delegate
7.Function Delegation DemoFunction Delegation Demo
8.Function Delegate: output stringFunction Delegate: output string
9.Delegate Demo for a Simple ClassDelegate Demo for a Simple Class
10.Delegate Syntax
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