We help IT Professionals succeed at work.

We've partnered with Certified Experts, Carl Webster and Richard Faulkner, to bring you two Citrix podcasts. Learn about 2020 trends and get answers to your biggest Citrix questions!Listen Now

x

pass constant name as a paramenter

Chaffe
Chaffe asked
on
Medium Priority
203 Views
Last Modified: 2010-04-23
Greetings, I have the following code.  in my Test() function, how do I retrive the value of a constant by passing constant name as a string.  (the constant name is the id parameter of the test function)  Thanks.
-----------------------------------------------------------
 Public Class MyClass1
            Public Const Str1 As String = "data1"
            Public Const Str2 As String = "data2"
End Class

 Public Class MyClass2
        Public Function Test(ByVal ID As String) As String
        Dim Keywords As String = ""
        Keywords = MyClass1.ID              'this obviously doesn't work.

        Return Keywords
    End Function

End Class
-----------------------------------------------------------
Comment
Watch Question

you normally make your constants global inside a module but here is the way i would write it

            Public Const Str1 As String = "data1"
            Public Const Str2 As String = "data2"

 Public Class MyClass1

End Class

 Public Class MyClass2
        Public Function Test(ByVal ID As String) As String
        Dim Keywords As String = ""
        Keywords = MyClass1.ID              'this obviously doesn't work.

        Return Keywords
    End Function
Commented:
try like this

Public Function Test(ByVal ID As String) As String
        Dim Keywords As String = ""
        Dim MyClass1 As New Class2
        Keywords = CallByName(MyClass1, ID, CallType.Get)              

        Return Keywords
    End Function

Not the solution you were looking for? Getting a personalized solution is easy.

Ask the Experts

Author

Commented:
appari, this is working great.  Is this going to return "nothing" if it doesn't fine the requested const? I'm just trying to think about exception handling.  Thanks.

Commented:
throws missingmemberexception
try


Catch ex As MissingMemberException

end try

Author

Commented:
Thanks for the help appari
Access more of Experts Exchange with a free account
Thanks for using Experts Exchange.

Create a free account to continue.

Limited access with a free account allows you to:

  • View three pieces of content (articles, solutions, posts, and videos)
  • Ask the experts questions (counted toward content limit)
  • Customize your dashboard and profile

*This site is protected by reCAPTCHA and the Google Privacy Policy and Terms of Service apply.

OR

Please enter a first name

Please enter a last name

8+ characters (letters, numbers, and a symbol)

By clicking, you agree to the Terms of Use and Privacy Policy.