Pick folder routine going to Error handler - Excel VBA - vba

Question

Below is code that allows the user to choose a folder and opens files within the folder. It essentially does this:
On open, look for filepath saved in worksheet in workbook based on username. If doesn't exist, then prompt user to find folder, then save filepath in worksheet
From step 1, if filepath is found based on user, use that filepath
Error handler: From step 1, if filepath is found based on user, but that filepath is not in use anymore(i.e. user moved the folder to a different filepath), then have user find the folder again, then update existing record
What i'm experiencing is this:
When there's no entries in the sheet, then it will prompt user to
find the folder, but then proceed to the errorhandler and ask the
user to find the folder again
When there are entries in the sheet and the file path is working, the errorhandler is still opened and asks the user to find the
folder again
If I take out the errorhandler, everything is smooth. It's just that I want to cover the possibility of the user moving the folder , so I want the workbook to prompt the user to find where they moved the folder, and update the existing record in the workbook to the new path
What am I doing wrong here?
Private Sub Workbook_Open()
Dim wkb1 As Workbook
Dim sht1 As Worksheet
Dim wkb2 As Workbook
Dim sht2 As Worksheet
Dim vafiles As Variant
Dim filepath As String
Dim filepath2 As String
Dim filepath3 As String
Dim rw As Long
Dim ws As Worksheet
Dim lastrow As Long
Dim icounter As Long
Application.DisplayAlerts = False
Application.EnableEvents = False
Application.ScreenUpdating = False
Application.Calculation = xlManual
Set ws = Worksheets("Paths")
rw = ws.Cells(ws.Rows.Count, "A").End(xlUp).Row + 1
Set wkb1 = ThisWorkbook
Set sht1 = wkb1.Sheets("Extract")
'======================================================
'Determine if Path was already saved before. If not, prompt user to choose folder
'======================================================
sal = Application.VLookup(Environ("username"), ws.Range("a:b"), 2, 0)
If IsError(sal) Then
MsgBox ("Please choose where your main folder is located. This will be stored so you won't need to look for it again.")
filepath = PICK_A_FOLDER()
ws.Cells(rw, 2) = PICK_A_FOLDER()
ws.Cells(rw, 1) = Environ("username")
Set wkb2 = Workbooks.Open(filepath & "\ Export.xlsx")
Set sht2 = wkb2.Sheets("Sheet1")
sht2.Cells.Copy Destination:=sht1.Range("a1")
Application.CutCopyMode = False
wkb2.Close True
Application.DisplayAlerts = True
Application.EnableEvents = True
Application.ScreenUpdating = True
Worksheets("Instructions").Activate
Application.Calculation = xlAutomatic
Else
'======================================================
'If filepath exists, use that one
'======================================================
filepath2 = sal
Set wkb2 = Workbooks.Open(filepath2 & "Export.xlsx")
Set sht2 = wkb2.Sheets("Sheet1")
sht2.Cells.Copy Destination:=sht1.Range("a1")
Application.CutCopyMode = False
wkb2.Close True
End If
'======================================================
'If user has moved their folder, we can find it again and update their record
'======================================================
On Error GoTo Errorhandler
Errorhandler:
MsgBox ("Looks like you've moved your Folder. Please find it so your record will be updated")
filepath3 = PICK_A_FOLDER()
lastrow = ws.Cells(Rows.Count, 1).End(xlUp).Row
For icounter = 2 To lastrow
If Cells(icounter, 1) = Environ("username") Then
Cells(icounter, 2) = PICK_A_FOLDER()
End If
Next icounter
Set wkb2 = Workbooks.Open(filepath3 & "")
Set sht2 = wkb2.Sheets("Sheet1")
sht2.Cells.Copy Destination:=sht1.Range("a1")
Application.CutCopyMode = False
wkb2.Close True
Application.DisplayAlerts = True
Application.EnableEvents = True
Application.ScreenUpdating = True
Worksheets("Instructions").Activate
Application.Calculation = xlAutomatic
End Sub

Answer 1

Actually solved this by taking out the errorhandler and inserting another if statement that captures an invalid directory:
if dir(sal & "Export.xlsx") = "" then
write error handler code

Answer 2

When a SubRoutine performs more that one task you should consider extracting the individual tasks into separate SubRoutines.
In this way:
You can debug each task independently of the other tasks
The logic is simplified into smaller units
The code is easier to read
You can reduce clutter by placing these SubRoutines into separate modules
Possible code reuse
Another unapparent benefit is that by simplifying the function of a SubRoutine it is much easier to remember the routines pattern and reuse the pattern when a similar situation arises.
Note: I often use If Len(...) then which is analogous to If Len(...) > 0 then. I do this to reduce clutter.
Standard Module
Function getSharedFolder() As String
Dim f As Range
With Worksheets("Paths")
Set f = .Range("A1", .Range("A" & .Rows.Count).End(xlUp)).Find(What:=Environ("username"), After:=.Range("A1"), LookAt:=xlWhole)
If Not f Is Nothing Then
'Dir([PathName], vbDirectory) returns empty if the [PathName] isn't a folder
If Len(Dir(f.Offset(0, 1).Value, vbDirectory)) Then
If Right(f.Offset(0, 1), 1) = "\" Then
getSharedFolder = f.Offset(0, 1)
Else
getSharedFolder = f.Offset(0, 1) & "\"
End If
End If
End If
End With
End Function
Function setSharedFolder() As Boolean
Dim f As Range
Dim PathName As String
PathName = PickSharedFolder
If Len(PathName) Then
setSharedFolder = True
With Worksheets("Paths")
Set f = .Range("A1", .Range("A" & .Rows.Count).End(xlUp)).Find(What:=Environ("username"), After:=.Range("A1"), LookAt:=xlWhole)
If f Is Nothing Then Set f = .Range("A1", .Range("A" & .Rows.Count).End(xlUp)).Offset(1)
f.Value = Environ("username")
f.Offset(0, 1) = PathName
End With
End If
End Function
Function PickSharedFolder() As String
Application.FileDialog(msoFileDialogFolderPicker).ButtonName = "Select Folder"
With Application.FileDialog(msoFileDialogFolderPicker)
.AllowMultiSelect = False
.Title = "Select Main Folder Location"
If .Show = -1 And .SelectedItems.Count = 1 Then
PickSharedFolder = .SelectedItems(1)
Else: Exit Function
End If
End With
End Function
Sub ToggleEvents(EnableEvents As Boolean, Optional DisplayAlerts = True)
With Application
.DisplayAlerts = DisplayAlerts
.EnableEvents = EnableEvents
.ScreenUpdating = EnableEvents
.Calculation = IIf(EnableEvents, xlCalculationAutomatic, xlCalculationManual)
End With
End Sub
Sub UpdateWorkBook(FilePath As String)
Dim WSSource As Worksheet
With Workbooks.Open(FilePath)
Set WSSource = .Sheets("Sheet1")
If WSSource Is Nothing Then
MsgBox "Sheet1 not found in " & FILENAME, vbCritical, "Update Cancelled"
Else
WSSource.Copy Destination:=ThisWorkbook.Sheets("Extract").Range("A1")
End If
.Close True
End With
End Sub
Workbook Module
Private Sub Workbook_Open()
Const FILENAME As String = "Export.xlsx"
Const PROMPT As String = "Press [Yes] to continue or [No] to cancel"
Dim FilePath As String, Title As String, SharedFolder As String
ToggleEvents False, False
Do
SharedFolder = getSharedFolder()
If Len(SharedFolder) = 0 Then
Title = "Folder not found"
Else
FilePath = SharedFolder & FILENAME
If Len(Dir(FilePath)) = 0 Then Title = "File not found"
End If
If Len(SharedFolder) = 0 Then
If MsgBox(PROMPT:=PROMPT, Buttons:=vbYesNo, Title:=Title) = vbYes Then
setSharedFolder
Else
Exit Sub
End If
End If
Loop Until Len(Dir(FilePath))
UpdateWorkBook FilePath
ToggleEvents True, True
End Sub