Question

So you know how PHP internal functions usually return a boolean FALSE when a function fails, or some other data type when the function succeeds? Is this possible in VB .Net?

For instance, lets say this simple code here

Public Function TrySomething(ByVal Param As String) \\what would go here??
    If Param <> "MAGICWORD" Then
        Return False
    Else
        Return "You Win!"
    End If
End Function

You see I want to return a BOOLEAN false when a function fails, and a string when the function works. Any ideas? I’ve looked everywhere, and when I search for “return multiple types” all I find is Tuple.

Answer 1

This will Work for you:

Public Function TrySomething(ByVal Param As String) As Object
If Param <> "MAGICWORD" Then
    Return False
Else
    Return "You Win!"
End If
End Function

You can check the values like this:

 Dim a As Boolean = TrySomething("")
 Dim b As String = TrySomething("MAGICWORD")