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Links To Access Code Examples

Create Recordset With AddNew
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Update Field(s) In A Recordset
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Export Excel FileDialog
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Create VBA SQL Statements
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Display File Images On A Form
Manipulate Files via VBA
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Number Subform Records
Reference Subform Objects
Parse Delimited Fields
Parameterized Queries (VBA)
Manipulating QueryDefs In VBA
FindFirst On Combined Keys
Dlookup Command
Dlookup In Form Datasheet
Execute SQL Delete Records
Commit Form To Table
Report With No Data
Reference Form Objects
DSNLess Connections To MySQL
Print Active Form Record
Count Records in Linked Tables
Delete Empty Tables
Open Linked SQL Tables

 

Test If A Worksheet Exists and Is Not Open So It Can Be Updated

The purpose of the code below is to validate that a target workbook is available and not open by another user so it can be updated. In this sample, we open the target workbook and increment a counter in that workbook. Once the counter has been updated, we save and close it. If you read the program notes, you will see all the steps required to ensure that the target workbook is updated properly.

Program Code

Option Explicit

Public Sub TestForFileExists()
' ***************************************************************
' This Demonstration Module Shows The Steps To Open And Update
' A Second Target Workbook From This Workbook
' For Integrity The VBA Code Performs The Following Checks:
' (1) Make Sure the Server Path To the Target Workbook Is Valid
' (2) If The Path Is Valid, Make Sure the Target Workbook Exists
' (3) If The Target Workbook Exists, Make Sure It Is Not Open
' (4) If All The Tests Above Are Good, Then Update The Target
' (5) Save And Close The Target Workbook
' ***************************************************************

Dim strDirectoryPath As String
Dim strTargetWorkbookName As String
Dim strFullPathToWorkbook As String

Dim lngNextSequence As Long

strDirectoryPath = "C:\MyTestDirectory\"
strTargetWorkbookName = "MyTestWorkbook.xls"

' ***************************************************************
' Make Sure That The Target Directory Path Is Available
' This Is Useful When Files Are Opened From a Server
' To Make Sure the Server is Up
' ***************************************************************
If Not FileFolderExists(strDirectoryPath) Then
    MsgBox ("The Directory " & strDirectoryPath & _
        vbCrLf & " Does Not Exist")
    Exit Sub
End If

' ***************************************************************
' Create The Full Path To The Target Workbook
' ***************************************************************
strFullPathToWorkbook = strDirectoryPath & strTargetWorkbookName

' ***************************************************************
' Confirm That The Full Path To The Workbook Exists
' ***************************************************************
If Not FileFolderExists(strFullPathToWorkbook) Then
    MsgBox ("The File " & strFullPathToWorkbook & _
        vbCrLf & " Does Not Exist")
    Exit Sub
End If

' ********************************************************
' Make Sure The Target Workbook Is Not Open
' ********************************************************
If IsFileOpen(strFullPathToWorkbook) Then
    MsgBox ("File " & strFullPathToWorkbook & " Is Open By Another User" _
        & vbCrLf & "Try Again Later")
    Exit Sub
End If

Application.ScreenUpdating = False

' ********************************************************
' Open The Workbook
' ********************************************************
On Error GoTo Target_Workbook_File_Open_Error:
Workbooks.Open strFullPathToWorkbook
On Error GoTo 0

' ********************************************************
' Update The Target Workbook Sequence Number In Cell (2,1)
' ********************************************************
lngNextSequence = Cells(2, 1).Value
lngNextSequence = lngNextSequence + 1
Cells(2, 1).Value = lngNextSequence

Workbooks(ThisWorkbook.Name).Activate

' ********************************************************
' Close And Save the Updated Target Workbook
' ********************************************************
On Error GoTo Target_Workbook_File_Save_Error:
Application.DisplayAlerts = False
Workbooks(strTargetWorkbookName).Close savechanges:=True
Application.DisplayAlerts = True
On Error GoTo 0

' ********************************************************
' Exit The Application
' ********************************************************
Exit_The_Application:
Application.ScreenUpdating = True
On Error GoTo 0
Exit Sub

' ********************************************************
' Target Workbook File Save Error
' ********************************************************
Target_Workbook_File_Save_Error:
    MsgBox ("Error Saving The Target Workbook: " & strFullPathToWorkbook)
    Resume Exit_The_Application

' ********************************************************
' Target Workbook File Open Error
' ********************************************************
Target_Workbook_File_Open_Error:
    MsgBox ("Error Opening: " & strFullPathToWorkbook)
    Resume Exit_The_Application
    
End Sub

Public Function IsFileOpen(FileName As String)
' ********************************************************
' Test To Determine If A File is Open
' ********************************************************
    Dim iFilenum As Long
    Dim iErr As Long
     
    On Error Resume Next
    iFilenum = FreeFile()
    Open FileName For Input Lock Read As #iFilenum
    Close iFilenum
    iErr = Err
    On Error GoTo 0
     
    Select Case iErr
    Case 0:    IsFileOpen = False
    Case 70:   IsFileOpen = True
    Case Else: MsgBox (Error(iErr) & " " & FileName)
    End Select
     
End Function

Public Function FileFolderExists(strFullPath As String) As Boolean
' ********************************************************
' Test To See If A Directory Or File Exists
' ********************************************************
On Error GoTo Exit_Folder_Test
FileFolderExists = False

If Not Dir(strFullPath, vbDirectory) = vbNullString Then FileFolderExists = True

Exit_Folder_Test:
On Error GoTo 0

End Function