Loop through folder changing file extensions VBA - vba

Question

On a monthly basis I have to aggregate daily files. The issue is I need the files to be in "TXT", but they are sent to me as "WRI".
I am able to do one file at a time if it is hardcoded with the following.
Name "C:\Users\John\Desktop\Folder1\SQLEXEC.WRI" As "C:\Users\John\Desktop\Folder1\SQLEXEC.TXT"
However, I want to be able to loop through the folder. But I am not sure how to change the code to allow it to loop.
Sub ConvertToTXT()
Application.DisplayAlerts = False
Application.ScreenUpdating = False
Dim strPath As String
Dim strFile As String
strPath = "C:\Users\John\Desktop\Folder1\" strFile = Dir(strPath & "*.wri")
Do While strFile <> ""
Name "C:\Users\John\Desktop\Folder1\SQLEXEC.WRI" As "C:\Users\John\Desktop\Folder1\SQLEXEC.TXT"
Loop
End Sub

Answer 1

I'd personally use the Scripting.FileSystemObject for this - it's much less prone to errors than manually building filepath strings. You'll need to add a reference to Microsoft Scripting Runtime:
Private Sub ConvertToTXT(filePath As String)
With New Scripting.FileSystemObject
Dim directory As Folder
Set directory = .GetFolder(filePath)
Dim target As File
For Each target In directory.Files
If LCase$(.GetExtensionName(target.Name)) = "wri" Then
Dim newName As String
newName = .BuildPath(filePath, .GetBaseName(target.Name)) & ".txt"
.MoveFile target.Path, newName
End If
Next
End With
End Sub
Call it by passing it the directory you want to perform the renaming in:
ConvertToTXT "C:\Users\John\Desktop\Folder1"
Note that is doesn't care if there's a trailing \ or not - this also works:
ConvertToTXT "C:\Users\John\Desktop\Folder1\"

Answer 2

Sub ConvertToTXT()
Const strPath As String = "C:\Users\John\Desktop\Folder1"
Dim strFile As String
Application.DisplayAlerts = False
Application.ScreenUpdating = False
strFile = Dir(strPath & "\" & "*.wri")
Do While strFile <> ""
Name strPath & "\" & strFile As strPath & "\" & Replace(strFile, ".wri", ".txt")
strFile = Dir
Loop
Application.DisplayAlerts = True
Application.ScreenUpdating = True
End Sub