[RESOLVED] HowTo Use the Name of Structur-Member Variable as an argument for a Function

[opus]

For example:

Public Structure MyStructure
   Public Int1 As Integer
   Public Int2 As Integer
   Public Int3 As Integer
   Public Int4 As Integer
End Structure
...
....

Dim Test as New MyStructure
...
'Somewhere in Code
DoCheck("Int1")
DoCheck("Int2")
DoCheck("Int3")
DoCheck("Int4")
....
....
Public Sub DoCheck(MemberVariableName as String)
   If Test.MemberVariableName=Whatever Then
   End If
End Sub

I know it doesn't work like this, but is it possible to handover the name of a membervariable and use it like that?

[jmcilhinney]

It's possible but it should generally be avoided if there's another way to do it. You would have to use Reflection in your DoCheck method:

Dim sourceType As Type = Test.GetType()
Dim field As FieldInfo = sourceType.GetField(MemberVariableName)
 
If field IsNot Nothing Then
    Dim value As Object = field.GetValue(Test)
 
    '...
End If

Reflection is useful in certain scenarios but is slow to execute and cumbersome to work with in code, hence it should only be used where there is no other convenient way to achieve your aim. Even if it requires a bit more code to do it without Reflection, you should take the other option. If it takes a lot more code or it's just not possible, then Reflection is a good option.

[opus]

..understood.
I'll take the option "a bit more code without reflection"

Thanks for the advice!