MS Access Export to .xls - ms-access

I am looking for sample "source code" to do this so I can create a button to automatically export all tables to spread sheets with the same name but with a .xls extension. I already know how to export tables manually.

I haven't tested but something like this should work for exporting to all same workbook...
Dim lTbl As Long
Dim strFile As String
Dim d As Database
'Set current database to a variable adn create a new Excel instance
Set d = CurrentDb
strFile = "c:\FolderName\FileName.xls" '## Change to file you want
'Loop through all tables
For lTbl = 0 To d.TableDefs.Count
'If the table name is a temporary or system table then ignore it
If Left(d.TableDefs(lTbl).Name, 1) = "~" Or _
Left(d.TableDefs(lTbl).Name, 4) = "MSYS" Then
'~ indicates a temporary table
'MSYS indicates a system level table
Else
DoCmd.TransferSpreadsheet acExport, acSpreadsheetTypeExcel9, d.TableDefs(lTbl).Name, strFile
End If
Next lTbl
'Release database object from memory
Set d = Nothing
Or this for all separate workbooks:
Dim lTbl As Long
Dim strFile As String
Dim d As Database
'Set current database to a variable adn create a new Excel instance
Set d = CurrentDb
Set xlApp = CreateObject("Excel.Application")
strFilePath = "c:\Database\" '## Cahnge to where you want to save"
'Loop through all tables
For lTbl = 0 To d.TableDefs.Count
'If the table name is a temporary or system table then ignore it
If Left(d.TableDefs(lTbl).Name, 1) = "~" Or _
Left(d.TableDefs(lTbl).Name, 4) = "MSYS" Then
'~ indicates a temporary table
'MSYS indicates a system level table
Else
Set wbExcel = xlApp.workbooks.Add
strFile = d.TableDefs(lTbl).Name & ".xls"
wbExcel.SaveAs FileName:=strFilePath & strFile, FileFormat:=56
wbExcel.Close
DoCmd.TransferSpreadsheet acExport, acSpreadsheetTypeExcel9, d.TableDefs(lTbl).Name, strFilePath & strFile
Set wbExcel = Nothing
End If
Next lTbl
xlApp.Quit
Set wbExcel = Nothing
Set xlApp = Nothing
'Release database object from memory
Set d = Nothing

Related

Exporting data from SCADA system

I am trying to create VBscript to export process data from a SCADA system (WinCC RT Professional) to periodically archive all process variables. The data are stored in SQL table that can be accessed through a connectivity pack. I managed to make the script working when exporting one tag (process variable), but I would like to loop over all tags in the system (about 60), collect them in another recordset and then all data from this recordset save in one csv-file. I have created RecSet that collects all variables (fields) of one tag (Time, Process Variable etc.), I only need values from Field 4 (the same field for all tags). I would then like to copy this field in another recordset - RecSetColl which collects all required data (Field 4) from all tags and finally save them in the CSV file. Thank you very much for any help.
Sub DataExport()
Dim fso 'FileSystemObject
Dim f 'File
Dim ts 'TextStream
Dim path 'Path
Dim ArchiveDate 'Archive date
'Name of CSV-file
ArchiveDate = ArchiveDate & Now
ArchiveDate = Replace(ArchiveDate,"/","")
ArchiveDate = Replace(ArchiveDate," ","")
ArchiveDate = Replace(ArchiveDate,":","")
ArchiveDate = "MDF_" & ArchiveDate
'Path to the csv-file
path = "D:\Historical_data\" & ArchiveDate & ".csv"
'Create Filesystemobject and CSV-file if not exists:
Set fso = CreateObject("Scripting.FileSystemObject")
If Not fso.FileExists(path) Then
fso.CreateTextFile(path)
Else
MsgBox "File already exists!"
Exit Sub
End If
'Create object and open it for writing
Set f = fso.GetFile(path)
Set ts = f.OpenAsTextStream(2,-2)
ts.WriteLine("Tag-Name;ValueID;Date/Time;Process-Value") 'Header
'Generate String for the CSV-Filename
Dim Pro 'Provider
Dim DSN 'Data Source Name
Dim DS 'Data Source
Dim ConnString 'Connection String
Dim MachineNameRT 'Name of the PC from WinCC-RT
Dim DSNRT 'Data Source Name from WinnCC-RT
Dim Conn 'Connection to ADODB
Dim RecSet 'RecordSet
Dim RecSetColl 'RecordSet storing data to be saved to the CSV-file
Dim Command 'Query
Dim CommandText 'Command-Text
Dim i
'Read the name of the PC-Station and the DSN-Name from WinCC-RT
Set MachineNameRT = HMIRuntime.Tags("#LocalMachineName")
Set DSNRT = HMIRuntime.Tags("#DatasourceNameRT")
'Preparing the Connection-String
Pro = "Provider=WinCCOLEDBProvider.1;" 'First instance of WinCCOLEDB
DSN = "Catalog=" & DSNRT.Read & ";" 'Name of Runtime-Database
DS = "Data Source=" & MachineNameRT.Read & "\WinCC" 'Data Source
'Build the complete String:
ConnString = Pro + DSN + DS
'Make Connection
Set Conn = CreateObject("ADODB.Connection")
Conn.ConnectionString = ConnString
Conn.CursorLocation = 3
Conn.open
Set RecSetColl = CreateObject("ADODB.Recordset")
With RecSetColl.Fields
.Append "Time1", adChar
.Append "AHU_RUN", adChar
.Append "Time2", adChar
.Append "TT01", adChar
.Append "TT02", adChar
End With
For i = 0 To 4
Set RecSet = CreateObject("ADODB.Recordset")
Set Command = CreateObject("ADODB.Command")
Command.CommandType = 1
Set Command.ActiveConnection = Conn
'Building the complete string
CommandText = "Tag:R," & i & ",'0000-00-00 12:00:00.000','0000-00-00 00:00:00.000'"
Command.CommandText = CommandText
Set RecSet = Command.Execute
RecSet.MoveFirst
RecSetColl.Fields(i) = RecSet.Fields(4) 'RecSet.Fields(4) stores a proces value
RecSet.Close
Set RecSet = Nothing
Set Command = Nothing
Next
'Writing recordsets to CSV-file
Do While Not RecSetColl.EOF
ts.WriteLine (RecSetColl.Fields(0).Value & ";" & RecSetColl.Fields(1).Value & ";" & RecSetColl.Fields(2).Value & ";" & RecSetColl.Fields(3).Value & ";" & RecSetColl.Fields(4).Value & ";" & RecSetColl.Fields(5).Value)
RecSetColl.MoveNext
Loop
RecSetColl.Close
Set RecSetColl = Nothing
Conn.close
Set Conn = Nothing
ts.Close
Set fso = Nothing
Set f = Nothing
Set ts = Nothing
End Sub
I do not really know whats not working, but a guess;
Does ValueID = 0 , (the "i" in the "for 0 to 4" ) exist in your project?
In the table "Archive" you will find the valid ValueIDs, starts with "1" in all my projects. It's simple to see in SQL Management Studio, perhaps sometimes 0 exist.
To get all the values exported, query the "Archive" table first and then ask for data in a loop using whatever ValueID's is returned.
//PerD

Get contents of laccdb file through VBA

I want to be able to view the contents of my access database's laccdb file through VBA so I can use it to alert users (through a button) who else is in the database.
I specifically don't want to use a 3rd Party tool. I have tried using:
Set ts = fso.OpenTextFile(strFile, ForReading)
strContents = ts.ReadAll
This works fine if only 1 user is in the database. But for multiple users it gets confused by the presumably non-ASCII characters and goes into this kind of thing after one entry:
Does anyone have any suggestions? It's fine if I just open the file in Notepad++...
Code eventually used is as follows (I didn't need the title and have removed some code not being used):
Sub ShowUserRosterMultipleUsers()
Dim cn As New ADODB.Connection, rs As New ADODB.Recordset
cn.Provider = "Microsoft.ACE.OLEDB.12.0"
cn.Open "Data Source=" & CurrentDb.Name
Set rs = cn.OpenSchema(adSchemaProviderSpecific, , "{947bb102-5d43-11d1-bdbf-00c04fb92675}")
While Not rs.EOF
Debug.Print rs.Fields(0)
rs.MoveNext
Wend
End Sub
I found this which should help, it's not actually reading the ldb file, but it has the info that you need (Source: https://support.microsoft.com/en-us/kb/198755):
Sub ShowUserRosterMultipleUsers()
Dim cn As New ADODB.Connection
Dim cn2 As New ADODB.Connection
Dim rs As New ADODB.Recordset
Dim i, j As Long
cn.Provider = "Microsoft.Jet.OLEDB.4.0"
cn.Open "Data Source=c:\Northwind.mdb"
cn2.Open "Provider=Microsoft.Jet.OLEDB.4.0;" _
& "Data Source=c:\Northwind.mdb"
' The user roster is exposed as a provider-specific schema rowset
' in the Jet 4 OLE DB provider. You have to use a GUID to
' reference the schema, as provider-specific schemas are not
' listed in ADO's type library for schema rowsets
Set rs = cn.OpenSchema(adSchemaProviderSpecific, _
, "{947bb102-5d43-11d1-bdbf-00c04fb92675}")
'Output the list of all users in the current database.
Debug.Print rs.Fields(0).Name, "", rs.Fields(1).Name, _
"", rs.Fields(2).Name, rs.Fields(3).Name
While Not rs.EOF
Debug.Print rs.Fields(0), rs.Fields(1), _
rs.Fields(2), rs.Fields(3)
rs.MoveNext
Wend
End Sub
I put together some code to read through the lock file and output a message listing users currently using the system.
Trying to read the whole file in at once seems to result in VBA treating the string as Unicode in the same way notepad does so I read in character by character and filter out non printing characters.
Sub TestOpenLaccdb()
Dim stm As TextStream, fso As FileSystemObject, strLine As String, strChar As String, strArr() As String, nArr As Long, nArrMax As Long, nArrMin As Long
Dim strFilename As String, strMessage As String
strFilename = CurrentProject.FullName
strFilename = Left(strFilename, InStrRev(strFilename, ".")) & "laccdb"
Set fso = New FileSystemObject
Set stm = fso.OpenTextFile(strFilename, ForReading, False, TristateFalse) 'open the file as a textstream using the filesystem object (add ref to Microsoft Scripting Runtime)
While Not stm.AtEndOfStream 'Read through the file one character at a time
strChar = stm.Read(1)
If Asc(strChar) > 13 And Asc(strChar) < 127 Then 'Filter out the nulls and other non printing characters
strLine = strLine & strChar
End If
Wend
strMessage = "Users Logged In: " & vbCrLf
'Debug.Print strLine
strArr = Split(strLine, "Admin", , vbTextCompare) 'Because everyone logs in as admin user split using the string "Admin"
nArrMax = UBound(strArr)
nArrMin = LBound(strArr)
For nArr = nArrMin To nArrMax 'Loop through all machine numbers in lock file
strArr(nArr) = Trim(strArr(nArr)) 'Strip leading and trailing spaces
If Len(strArr(nArr)) > 1 Then 'skip blank value at end
'Because I log when a user opens the database with username and machine name I can look it up in the event log
strMessage = strMessage & DLast("EventDescription", "tblEventLog", "[EventDescription] like ""*" & strArr(nArr) & "*""") & vbCrLf
End If
Next
MsgBox strMessage 'let the user know who is logged in
stm.Close
Set stm = Nothing
Set fso = Nothing
End Sub

VBA Access: Files with Nulls

Overall Goal:
Pull all files from folder > format files in staging table > copy staging table to master table > kill staging table > rinse and repeat until all files have been taken from folder, formatted and put into the master table.
Issue:
I have apparently not taken into account that some of the files sent to me will have blank worksheets (rather they may have a value that says "No Data" in cell A1). When my macro hits the "No Data" or blank sheet I get a Null error (94).
What I've tried:
strF1Data = Nz(!ref_val)
strF1Data = Nz(!ref_val,"")
Suspicions:
I think I can update the SQL UPDATE line to allow Nulls, but I feel like a more efficient solution would be to skip if null. However I have tried modifying the Do Until statement and had no luck...
Possibly Worth Mentioning:
The files have multiple worksheets. I learned this the hard way in finding this error on a random worksheet between several other worksheets that did have data.
Code: (to help save some space, I'm only giving the call files bit and formatting piece, I don't think the other pieces will be of any use. However if you would like them then let me know.)
The overall macro (see next code sections for piece with error):
Sub Pull_File_into_Staging_Table()
'Process:
'1 - Loop through all files saved to specified folder making an internal list of the files
'2 - Paste one files content to staging table at a time
'3 - Format the information in the staging table
'4 - Copy formatted staging table to 1Compare Table (master table)
Dim strFile As String 'Filename
Dim strFileList() As String 'File Array
Dim intFile As Integer 'File Number
Dim filename As String
Dim path As String
DoCmd.SetWarnings False
path = "C:\Users\USER\Desktop\Test\"
Dim rs As DAO.Recordset ' Moved from below
Dim db As DAO.Database
Set db = CurrentDb
'Loop through the folder & build file list
strFile = Dir(path & "*.xls")
While strFile <> ""
'add files to the list
intFile = intFile + 1
ReDim Preserve strFileList(1 To intFile)
strFileList(intFile) = strFile
strFile = Dir()
Wend
'see if any files were found
If intFile = 0 Then
MsgBox "No files found"
Exit Sub
End If
'cycle through the list of files
For intFile = 1 To UBound(strFileList)
filename = path & strFileList(intFile)
DoCmd.TransferSpreadsheet acImport, acSpreadsheetTypeExcel8, "Stage", filename, False
Call Format_Staging_Table
Call Copy_from_Stage_to_Master
Call Clear_Staging_Table
Next intFile
DoCmd.SetWarnings True
End Sub
The piece with the issue:
Sub Format_Staging_Table()
Dim strFile As String 'Filename
Dim strFileList() As String 'File Array
Dim intFile As Integer 'File Number
Dim filename As String
Dim path As String
DoCmd.SetWarnings False
path = "C:\Users\USER\Desktop\Test\"
Dim rs As DAO.Recordset ' Moved from below
Dim db As DAO.Database
Set db = CurrentDb
CurrentDb.Execute ("ALTER TABLE Stage ADD COLUMN UPC Text, SR_Profit_Center Text, SR_Super_Label Text, SAP_Profit_Center Text, SAP_Super_Label Text;")
CurrentDb.TableDefs("Stage").Fields("F1").Name = "ref_val"
Dim ref_val As String
Set rs = db.OpenRecordset("SELECT TOP 1 ref_val FROM Stage;", dbOpenDynaset)
ref_val = rs.Fields(0).Value
rs.Close
db.Execute "DELETE FROM [Stage] WHERE ref_val = '" & ref_val & "';"
Const YOUR_TABLE_NAME As String = "Stage"
Dim SQL_UPDATE_DATA As String
SQL_UPDATE_DATA = "SELECT *, ';' & '" & ref_val & "' FROM [" & YOUR_TABLE_NAME & "] WHERE SR_Profit_Center Is Null"
Dim strF1Data As String
Dim varData As Variant
Set rs = CurrentDb.OpenRecordset(SQL_UPDATE_DATA)
With rs
Do Until .EOF
strF1Data = !ref_val
varData = Split(strF1Data, ";")
If UBound(varData) = 4 Then
.Edit
!ref_val = ref_val
!UPC = varData(0)
!SR_Profit_Center = varData(1)
!SR_Super_Label = varData(2)
!SAP_Profit_Center = varData(3)
!SAP_Super_Label = varData(4)
.Update
End If
.MoveNext
Loop
.Close
End With
Set rs = Nothing
End Sub
Also I'm aware of the extra variable pieces, I will clean it up once I get it working.
File Examples:
Working File:
CE16041901
00791558441123;US1K100017;CGR;US1K100001;UNKNOW
00791558442328;US1K100017;CGR;US1K100001;UNKNOW
00791558440720;US1K100017;CGR;US1K100001;UNKNOW
00791558444629;US1K100017;CGR;US1K100001;UNKNOW
00791558440522;US1K100017;CGR;US1K100001;UNKNOW
00791558443325;US1K100017;CGR;US1K100001;UNKNOW
Not Working File:
CE16042001
00791558334128;US1K100017;CGR;US1K100001;UNKNOW
00791558159523;US1K100017;CGR;US1K100001;UNKNOW
00602547736604;US1A100018;UR;US1A100018;US-RU
I appreciate any help. I ran with this as far as I could, but I am still very much a novice when it comes to access and vb. If you need more information or clarification please let me know and I'll do my best to provide/explain.
No need to touch the staging table functions. Simply conditionally populate the strFileList array depending if Excel workbooks' first sheet contains No Data or empty cell. Recall Access VBA has complete access to all Excel objects via COM interface or Excel VBA reference and so can iteratively open workbooks. Hence, adjust your While/Wend loop accordingly:
Sub Pull_File_into_Staging_Table()
'...same code...
Dim objXL As Object
Dim wb As Object
Set objXL = CreateObject("Excel.Application")
strfile = Dir(Path & "*.xls")
While strfile <> ""
Set wb = objXL.Workbooks.Open(Path & strfile)
If wb.Sheets(1).Range("A1") <> "No Data" AND wb.Sheets(1).Range("A1") <> "" Then
'add files to the list
intFile = intFile + 1
ReDim Preserve strFileList(1 To intFile)
strFileList(intFile) = strfile
End If
strfile = Dir()
wb.Close False
Set wb = Nothing
Wend
'...

Access VBA - Relink external excel workbook

How do I get MS Access to relink an external excel workbook via VBA macro?
I can do this using linked table manager but I would like to do this via VBA, so that I could create a button for users to press to locate the new workbook
Select new workbook
Relink external excel workbook
DoCmd.transferSpreadsheet aclink,,"Sales", "C:\Sales.xlsb", true, "Sales!E2:BC200"
I use the following code to reconnect to linked tables.
Public Function FixTableLink()
Dim db As Database
Dim strPath As String
Dim strConnect As String
strPath = CurrentProject.Path
strPath = strPath & "\DatabaseName.extention"
strConnect = ";DATABASE=" & strPath
Set db = CurrentDb
For Each tbl In db.TableDefs
If Nz(DLookup("Type", "MSysObjects", "Name = '" & tbl.name & "'"), 0) = 6 And tbl.Connect <> strConnect Then
tbl.Connect = strConnect
tbl.RefreshLink
End If
Next tbl
End Function
Change strPath to the path of your backend
You can use the following code to open a dialog box to search for the file path
Function SelectFile() As String
On Error GoTo ExitSelectFile
Dim objFileDialog As Object
Set objFileDialog = Application.FileDialog(1)
With objFileDialog
.AllowMultiSelect = False
.Show
Dim varSelectedItem As Variant
For Each varSelectedItem In .SelectedItems
SelectFile = varSelectedItem
Next varSelectedItem
End With
ExitSelectFile:
Set objFileDialog = Nothing
End Function
'File type filters can be added to the filedialog property using the following syntax:
'.Filters.Clear
'.Filters.Add "File Type Description", "*.file extension"
''Start folder can be specified using:
'.initialfilename="folder path"
Then in the first code block you can use
strPath =selectfile
Something like this, perhaps.
Dim InputFile As String
Dim InputPath As String
InputPath = "C:\ExcelPath\"
InputFile = Dir(InputPath & "*.xls")
Do While InputFile <> ""
DoCmd.TransferSpreadsheet acLink, , "Your table name","Path to your workbook file", True, "Sheet1!RangeYouNeed"
InputFile = Dir
Loop

Automatically merge split ms access database

At work we have a split ms access database. The backend lies on a drive that is mapped locally (so for everyone it's the same path). I know want to create a button in the frontend that when clicked automatically creates a merged version of the database. This version is necessary for out specific backup/history needs. I have very little knowledge of VBA programming, so any help is appreciated.
To create the merged version the code should just execute the following:
Create duplicate frontend (?)
Delete all existing tables in the duplicate
Import tables from the backend into the duplicate
(I am aware that it is not such a good idea to merge split databases, but in this case with many users that have absolutely no knowledge of CS it is the most usable solution)
Create a Module in the front-end database with the following Function
Public Function ImportLinkedTables()
Dim cdb As DAO.Database, tbd As DAO.TableDef
Dim tablesToLink As Collection, item As Variant, a() As String
Const LinkPrefix = ";DATABASE="
Set cdb = CurrentDb
Set tablesToLink = New Collection
For Each tbd In cdb.TableDefs
If tbd.Connect Like (LinkPrefix & "*") Then
'' tab-delimited list: TableDef name [tab] Source file [tab] Source table
tablesToLink.Add tbd.Name & vbTab & Mid(tbd.Connect, Len(LinkPrefix) + 1) & vbTab & tbd.SourceTableName
End If
Next
Set tbd = Nothing
For Each item In tablesToLink
a = Split(item, vbTab, -1, vbBinaryCompare)
DoCmd.DeleteObject acTable, a(0)
Debug.Print "Importing [" & a(0) & "]"
DoCmd.TransferDatabase acImport, "Microsoft Access", a(1), acTable, a(2), a(0), False
Next
Set tablesToLink = Nothing
Set cdb = Nothing
DoCmd.Quit
End Function
Create a Macro named "ImportLinkedTables" with a single step:
RunCode
Function Name ImportLinkedTables()
The code behind the form button to kick off the process would be
Private Sub Command0_Click()
Dim fso As FileSystemObject
Dim wshShell As wshShell
Dim accdbName As String, command As String
Const SourceFolder = "Y:\_dev\"
Const DestFolder = "C:\Users\Gord\Desktop\"
accdbName = Application.CurrentProject.Name
'' copy front-end file to new location
Set fso = New FileSystemObject
fso.CopyFile SourceFolder & accdbName, DestFolder & accdbName, True
Set fso = Nothing
Set wshShell = New wshShell
command = """"
command = command & wshShell.RegRead("HKLM\Software\Microsoft\Office\" & Application.Version & "\Common\InstallRoot\Path")
command = command & "MSACCESS.EXE"" """ & DestFolder & accdbName & """ /x ImportLinkedTables"
wshShell.Run command, 7, False
Set wshShell = Nothing
End Sub