Excel VBA continues to 'Open File' even after Cancel - excel

Question

Okay here it is. I've done a bunch of coding in the last 3 or 4 months, learned a lot, BUT, I can't figure out why this code STILL opens a file when I hit cancel at the end once the popup window comes up showing my filtered filenames. Any advice would be highly appreciated.
Sub OpenByPartialName()
' Returns popup window with only filtered filenames matching
' Partial Filename input
Dim WB As Workbook
Dim Ans As String
Dim MyFile As String
Dim path As String
' Folder Path Name for Forms
path = ("S:\Forms Folder\")
Ans = InputBox("Enter Partial filename Filter", "Open File With Partial Name Filter")
MyFile = Dir("S:\Forms Folder\" & "*" & Ans & "*.xls")
MyFilter = path & "*" & Ans & "*.xls"
With Application.FileDialog(msoFileDialogOpen)
.AllowMultiSelect = False
.InitialFileName = MyFilter
If .Show = 1 Then
MyFile = .SelectedItems(1)
End If
End With
On Error Resume Next
Set WB = Workbooks.Open(MyFile)
End Sub

Answer 1

That would be a dirty hack, but if you had an Else branch here:
If .Show = 1 Then
MyFile = .SelectedItems(1)
Else
MyFile = vbNullString
End If
...the code that actually opens the file could verify whether MyFile is empty or not before trying:
On Error Resume Next
If MyFile <> vbNullString Then Set WB = Workbooks.Open(MyFile)
That said I think you should be handling at least error 53 ("file not found") here, instead of just shoving all errors under the carpet.
Also the WB reference isn't used. Perhaps the Sub should be a Function that returns the opened workbook, or Nothing if opening fails?

Answer 2

This is what I use to select a directory. If the function returns an empty string, I don't try to open the file.
Private Function FolderPicker() As String
'*******************************************
' returns directory path to be printed to
' does not allow multiple selections,
' so returning the first item in selected
' items is sufficient.
'
' returns empty string On Error or if the
' user cancels
'********************************************
On Error GoTo ErrHandler
Const DefaultDirectory As String = "C:Path\to\default\directory\"
With Application.FileDialog(msoFileDialogFolderPicker)
.AllowMultiSelect = False
.Title = "Choose Directory to Print to"
.InitialFileName = DefaultDirectory
.InitialView = msoFileDialogViewSmallIcons
If .Show <> -1 Then
FolderPicker = vbNullString
Else
FolderPicker = .SelectedItems(1)
End If
End With
Exit Function
ErrExit:
FolderPicker = vbNullString
Exit Function
ErrHandler:
MsgBox "Unexpected Error: " & Err.number & vbCrLf & "Source: " & Err.Source & _
"Description: " & Err.Description, vbCritical, "ERROR!"
Resume ErrExit
End Function
So, you would call it like this.
MyFile = FolderPicker
If MyFile <> vbNullString Then
Set WB = Workbooks.Open(MyFile)
End If

Answer 3

Much blood, sweat and tears later (Serious web surfing, cobbling code together and retesting) I have found an answer that works without any problems for pressing 'Cancel' at any point.
Sub OpenAuditPartialName()
' Returns popup window with only filtered
' filenames matching input criteria.
' Filenames are saved from another code that uses 3 variables to generate a _
' filename 'Filename part1_Filename part2_Filename part3 Forms.xls'
Dim WB As Workbook
Dim Ans As String
Dim MyFile As String
Dim path As String
' Folder path for Forms
path = ("S:\Forms Folder\")
Ans = InputBox("Enter any part of the filename to search by." & vbCrLf & vbCrLf & _
"Full or Partial information is OK." & vbCrLf & vbCrLf & "Filename part1" _
& vbCrLf & "Filename part2" & vbCrLf & "Filename part3", "Enter Partial Filename Filter")
' Exits on 'Cancel' as it should
If Ans = "" Then
Exit Sub
End If
MyFile = Dir(path & "*" & Ans & "*.xls")
MyFilter = path & "*" & Ans & "*.xls"
'*******************************************
With Application.FileDialog(msoFileDialogOpen)
.AllowMultiSelect = False
.InitialFileName = MyFilter
' Now accepts the 'Cancel' instead of continuing to open the first file
' in the filtered list when pressed
If .Show = 0 Then
ElseIf Len(Ans) Then
MyFile = .SelectedItems(1)
On Error Resume Next
Set WB = Workbooks.Open(MyFile)
Else
Exit Sub
End If
'*******************************************
End With
End Sub