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Global Subs and Functions VB.NET

Posted on 2014-03-21
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Last Modified: 2014-03-21
I have a couple of functions I would like to be available across my classes and forms.
Error Logging, Progress Logging, Send Mail and a Message Box helper for debugging.

I know I can define these on my main form called "Main" and then call them in a class as Main.SubName() - but being a lazy bugger, I want to be able to just call them as SubName() without the main form name.

I created a new class here's my code:
Public Class myHelpers
   
 'Message Box Helper - for debugging 
    Public Shared Sub mbHelper(ByVal lineNumber As Integer, ByVal Task As String, ByVal message As String, ByVal additionalInfo As String)
        Dim title As String = "Debug Information"
        Dim messageText As String = "Line Number: " & lineNumber & vbCrLf & "Task: " & Task & vbCrLf & "Message: " & message & vbCrLf & "Additional Info: " & additionalInfo
        MsgBox(messageText, MsgBoxStyle.OkOnly, title)

    End Sub

End Class

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In my forms and classes I imported myHelpers - but that did not work, mbHelper is not recognized.

Any ideas what I'm missing?  Sorry if this is a simple problem - but I really appreciate the help!!!
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Question by:slightlyoff
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5 Comments
 
LVL 75

Expert Comment

by:käµfm³d 👽
ID: 39945217
In .NET there is no such concept as "global functions"--static methods are the closest equivalent. Even though the old VB6-style functions like Mid, InStr, and MsgBox are available in .NET, really they are just syntactic sugar, and their usages gets mapped into actual class/methods (Strings.Mid, Strings.InStr, Interaction.MsgBox). I'm afraid you won't get to be *that* lazy in .NET  = )
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Accepted Solution

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käµfm³d   👽 earned 500 total points
ID: 39945222
Actually, I focused too much on the .NET and not enough on the VB. I forgot that you can put your functions into a module, and they should be readily available. Just make sure they are marked Public.

e.g.

Public Class Form1

    Private Sub Form1_Load(sender As System.Object, e As System.EventArgs) Handles MyBase.Load
        DoSomething()
    End Sub
End Class

Module Module1
    Public Sub DoSomething()

    End Sub
End Module

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Even doing this, under the hood your module gets turned into a NotInheritable class. So functionally you are not gaining anything, but syntactically you will achieve your goal.
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Author Comment

by:slightlyoff
ID: 39945224
Thanks for your help!  I guess I'll just get used to typing it out then.  Thank you!
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LVL 1

Author Comment

by:slightlyoff
ID: 39945226
LOL - I responded too fast.  I'll give that a try.
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LVL 1

Author Comment

by:slightlyoff
ID: 39945231
Perfect!  Thank you so much :)
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