How to find a file using a pattern? - vbscript

Question

I have a script that is supposed to grab a file from a folder and attach it to an email.
The code runs but nothing happens. I assume it's because strLocation is empty.
Here is an example of the file path I am trying to grab:
"C:\Users\MChambers\Desktop\Pricing Reports\Pricing_Report_201908121239 Formatted.xlsx"
Option Explicit
Const olMailItem = 0
Function FindFirstFile(strDirPath, strPattern)
Dim strResult
Dim objRegExp, objMatches
Set objRegExp = New RegExp
objRegExp.Pattern = strPattern
objRegExp.IgnoreCase = True
Dim objFso, objFolder, objFile
Set objFSO = CreateObject("Scripting.FileSystemObject")
Set objFolder = objFSO.GetFolder(strDirPath)
For Each objFile in objFolder.Files
Set objMatches = objRegExp.Execute(objFile.Name)
If objMatches.Count > 0 Then
strResult = objMatches(0).Value
Exit For
End If
Next
If Len(strResult) > 0 Then
If Right(strDirPath, 1) <> "\" Then strDirPath = strDirPath & "\"
strResult = strDirPath & strResult
End If
FindFirstFile = strResult
End Function
Sub SendBasicEmail()
Dim olApp: Set olApp = CreateObject("Outlook.Application")
Dim olEmail: Set olEmail = olApp.CreateItem(olMailItem)
Dim strLocation
Dim strPattern
strPattern = "Pricing_Report_*Formatted.xlsx"
strLocation = FindFirstFile("C:\Users\MChambers\Desktop\Pricing Reports\", strPattern)
If strLocation <> "" Then
With olEmail
.SentOnBehalfOfName = "genericemail"
.Attachments.Add (strLocation)
.To = "myemail"
.Subject = "Subject"
.Send
End With
End If
End Sub
SendBasicEmail
Update: The solution below was correct. In addition, I had to call the sub directly at the end of the file which I have updated in the code above.

Answer 1

The pattern you're using doesn't do what you apparently think it does.
strPattern = "Pricing_Report_*Formatted.xlsx"
You seem to expect the above to do a wildcard match (i.e. "Pricing_Report_" followed by any amount of text and "Formatted.xlsx"). That is not how regular expressions work. * in a regular expression means "zero or more times the preceding expression". The character . also has a special meaning in regular expressions, which is "any character except line-feed. Because of that your pattern would actually match the string "Pricing_Report" followed by any number of consecutive underscores, the string "Formatted", any single character except line-feed, and the string "xlsx".
Change the pattern to this
strPattern = "Pricing_Report_.*Formatted\.xlsx"
and the code will do what you want.
For further information about regular expressions in VBScript see here.