vb.netparametersoptional-parameters

How to add an optional parameters/default value parameters in VB function?

How can I create a method that has optional parameters in it in Visual Basic?

Solution

  • Use the Optional keyword and supply a default value. Optional parameters must be the last parameters defined, to avoid creating ambiguous function signatures.

    Sub MyMethod(ByVal Param1 As String, Optional ByVal FlagArgument As Boolean = True)
    If FlagArgument Then
        'Do something special
        Console.WriteLine(Param1)
    End If

End Sub

    Call it like this:

    MyMethod("test1")

    Or like this:

    MyMethod("test2", False)