Iterating through the constants in a structure

  • Thread starter Thread starter Bob Day
  • Start date Start date
B

Bob Day

Using VS 2003, VB.NET, MSDE

Is there a way to itterate through the items in a structure? Consider the
structure below, which holds the name of wave files. I would like to
itterate through them to confirm the wave files actually exist on the hard
disk. I don't see any collection or way to do it.

I would like something like this (or anything that would work):

dim Constant as Structure_Prompts_Constant

For each Constant in Structure_Prompts_Constant_Collection
' code to confirm file exists
next
------------------------------------------------------
Friend Structure Prompts

Public Const PlayPINAccessDenied1of2 As String =
"Play_PIN_Access_Denied_1of2.wav"

Public Const PlayPINAccessDenied2aof2 As String =
"Play_PIN_Access_Denied_2aof2.wav"

Public Const PlayPINAccessDenied2bof2 As String =
"Play_PIN_Access_Denied_2bof2.wav"

End Structure

Thanks!

Bob Day
 
Bob said:
Using VS 2003, VB.NET, MSDE

Is there a way to itterate through the items in a structure? Consider the
structure below, which holds the name of wave files. I would like to
itterate through them to confirm the wave files actually exist on the hard
disk. I don't see any collection or way to do it.

I would like something like this (or anything that would work):

dim Constant as Structure_Prompts_Constant

For each Constant in Structure_Prompts_Constant_Collection
' code to confirm file exists
next
------------------------------------------------------
Friend Structure Prompts

Public Const PlayPINAccessDenied1of2 As String =
"Play_PIN_Access_Denied_1of2.wav"

Public Const PlayPINAccessDenied2aof2 As String =
"Play_PIN_Access_Denied_2aof2.wav"

Public Const PlayPINAccessDenied2bof2 As String =
"Play_PIN_Access_Denied_2bof2.wav"

End Structure

Thanks!

Bob Day
Click to expand...

How about something like

Friend Structure Prompts
Public WaveFiles() as String=New String()
{"Play_PIN_Access_Denied_1of2.wav", "Play_PIN_Access_Denied_2aof2.wav",
"Play_PIN_Access_Denied_2bof2.wav"}
End Structure

then you can iterate through WaveFiles and don't need to use slow and
ugly Reflection code.

Regards,
Urs
 
Hi Bob,

Thanks for posting in the community.

First of all, I would like to confirm my understanding of your issue.
From your description, I understand that you wants to iterate through the
fields of a structure.
Have I fully understood you? If there is anything I misunderstood, please
feel free to let me know.

I agree with Armin's suggestion, reflection will be a good choice.
Here is some code.

Dim ob As Prompts
Dim fdinfo() As FieldInfo = ob.GetType().GetFields()
For Each o As FieldInfo In fdinfo
Console.WriteLine(ob.GetType().InvokeMember(o.Name,
BindingFlags.GetField, Nothing, ob, New Object() {}))
Next

Also why you do not declare the structure as string array as Urs's
suggestion.


If you have any concern on this issue,please post here.


Best regards,

Peter Huang
Microsoft Online Partner Support

Get Secure! - www.microsoft.com/security
This posting is provided "AS IS" with no warranties, and confers no rights.
 
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