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Using a variable to run a sub or function

Posted on 2007-11-21
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Last Modified: 2013-11-07
This seems so simple....sorry if it's silly.  We'll blame it on the last day before a holiday.  

Given that I have a variable called strSubNm and that the value stored in that variable is the name of one of my subs, how can I use the value stored in that variable to run a subroutine?

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Question by:Strabaneboy
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7 Comments
 
LVL 23

Expert Comment

by:Ashish Patel
ID: 20329296
You cannot do that. Search out for some work around for it.
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LVL 55

Expert Comment

by:Jaime Olivares
ID: 20329324
Indeed it is possible, with reflection. I assume the posible subroutines all belong to the same class and all have the same parameter list. Could you specify?
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Author Comment

by:Strabaneboy
ID: 20329345
The subs do, in fact, all belong to the same class and are being called w/o any params.
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LVL 55

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Jaime Olivares earned 125 total points
ID: 20329414
Ok, then should be something like this:

Dim mysub as String = "testsub"
Dim method as MethodInfo = myClass.GetType().GetMethod(mysub)
method.Invoke(myClass, Nothing)

where myClass is an instance of your class
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LVL 27

Expert Comment

by:VBRocks
ID: 20329470
You can also do it like this:

    Dim strSubNm As String = "MySub"
    CallByName(Me, strSubNm, CallType.Method)


    Public Sub MySub()
        MsgBox("Test")
    End Sub
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LVL 86

Expert Comment

by:Mike Tomlinson
ID: 20329495
*** The "old school" CallByName() method (it's carried over from VB6) proposed by VBRocks requires that the method be PUBLIC...it doesn't work with Private members.
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Author Closing Comment

by:Strabaneboy
ID: 31410413
This rocks!  Thanks so much.  

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