Question

I think im overcomplicating something simple but im looking for a VB.Net code to “filter” file names.

Scenario:
My company has a folder on the server with over 65,000 files on it. The new machine that reads those files is case sensitive and only accepts “*.S4” file extensions.

So, I need to convert all the file names to “*.S4” but I’d like the option to replace each file with a pattern I Specify.

For example:

Find > test.s4

Replace > test_1.S4

Using Patterns:

Find > *.s4

Replace > *_1.S4

Heres the code I have so far (doesnt work):

    'Inputs:
    Dim Filename As String = "ThisIsAnExample.s4"
    Dim Find As String = "*.s4"
    Dim Replace As String = "*.S4"

    Find = Find.Replace("*", "(.*)")
    Replace = Replace.Replace("*", "(.*)")

    Dim rgxExp As New System.Text.RegularExpressions.Regex(Find)

    MsgBox(rgxExp.Replace(Filename, Replace))

I know its possible, I wrote a similar script in Javascript once.

Answer 1

Can’t you do this?

  Dim input As String = "ThisIsAnExample.s4"
  Dim pattern As String = "\.s4$"
  Dim replacement As String = ".S4"
  Dim rgx As New Regex(pattern)
  Dim result As String = rgx.Replace(input, replacement)

  Console.WriteLine("Original String: {0}", input)
  Console.WriteLine("Replacement String: {0}", result)