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Repair Access database

Join Date: Mar 2005
Posts: 65
Reputation: cpopham is an unknown quantity at this point 
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cpopham cpopham is offline Offline
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Repair Access database

  #1  
Jun 2nd, 2006
Here is one that is stumping me.

I have an Access 2000 database backend. It got corrupted. It is a large database. I compacted and repaired it and a record came up corrupted. There was a compact error table created that has a binary column in it. The binary column points to a bookmark that tells which row was corrupted. I am trying use vb .net to retrieve that row using the binary column to show me which record is corrupted, however, I cannot get it to work right. I have found VBA for Access code that does something similar, but I need it in VB .net. Here is the VBA code that I have:

Sub main() 
    On Error GoTo ErrorHandler 
    Dim db As DAO.Database, vBookMark As Variant, _ 
      rsMSysCompactError As DAO.Recordset, strErrorTable As String, _ 
      rsErrorTable As DAO.Recordset, fldErrorField As DAO.Field, _ 
      strSQLSEL As String, strColumnValue As Variant, _ 
      qdTemp As QueryDef, strSQLINS As String, intLoop As Integer, _ 
      lngTableNameLength As Long, _ 
      colErrorCollection As New Collection, intErrorCount As Integer 

    Set db = CurrentDb() 
    ' Walk through the MSysCompactError table to find rows that reflect 
    ' lost data values. 
    Set rsMSysCompactError = db.OpenRecordset("SELECT * FROM MSysCompactError WHERE ErrorRecId IS NOT NULL", dbOpenDynaset) 
    intErrorCount = 0 
    While Not rsMSysCompactError.EOF 
        ' Get the name of the table that had column data missing. 
        strErrorTable = rsMSysCompactError!ErrorTable 
        ' Check to see that tablename is not greater than 48 characters 
        ' to stay under 64 character tablename limit. 
        lngTableNameLength = Len(strErrorTable) 
        If lngTableNameLength > 48 Then 
            strErrorTable = Mid(strErrorTable, 1, 48) 
            ' See if this truncated table name already exists. 
            On Error Resume Next 
            colErrorCollection.Add strErrorTable, strErrorTable 
            ' If this already exists in the collection, then there is a 
            ' duplicate table name. 
            If Err = 457 Then 
                ' Truncate one more digit to append on the intErrorCount 
                ' number to eliminate the duplicate table name. 
                strErrorTable = Mid(strErrorTable, 1, 47) 
                strErrorTable = strErrorTable & Mid((Str(intErrorCount)), 2, 1) 
                intErrorCount = (intErrorCount + 1) 
            End If 
        End If 
         
        ' Get the bookmark value of the row that had lost column data. 
        vBookMark = rsMSysCompactError!ErrorRecId 
        ' Open table that has lost column data. 
        Set rsErrorTable = db.OpenRecordset(strErrorTable, dbOpenTable, dbReadOnly) 
        ' Move to row that has lost column data. 
        rsErrorTable.Bookmark = vBookMark 
        ' Start to build SQL string to call up in a table window. 
        strSQLSEL = "SELECT * INTO MSysCompactError" & strErrorTable & " FROM " & strErrorTable & " WHERE " 
        strSQLINS = "INSERT INTO MSysCompactError" & strErrorTable & " SELECT * FROM " & strErrorTable & " WHERE " 
        intLoop = 0 
        For Each fldErrorField In rsErrorTable.Fields 
            strColumnValue = fldErrorField.Value 
            ' Logic to build predicate based on various data types. 
            If Not IsNull(strColumnValue) Then 
                ' Can't use ordinal as no guarantee of first column 
                ' being zero. 
                ' Check to see if this is the first column or not to 
                ' build SQL statement. 
                If intLoop = 0 Then 
                    If fldErrorField.Type = dbDate Then 
                        strSQLSEL = strSQLSEL & "[" & fldErrorField.Name & "] = " & "#" & strColumnValue & "#" 
                        strSQLINS = strSQLINS & "[" & fldErrorField.Name & "] = " & "#" & strColumnValue & "#" 
                    Else 
                        If fldErrorField.Type = dbText Or fldErrorField.Type = dbChar Or fldErrorField.Type = dbMemo Then 
                            strSQLSEL = strSQLSEL & "[" & fldErrorField.Name & "] = " & "'" & strColumnValue & "'" 
                            strSQLINS = strSQLINS & "[" & fldErrorField.Name & "] = " & "'" & strColumnValue & "'" 
                        Else 
                            strSQLSEL = strSQLSEL & "[" & fldErrorField.Name & "] = " & strColumnValue 
                            strSQLINS = strSQLINS & "[" & fldErrorField.Name & "] = " & strColumnValue 
                        End If 
                    End If 
                Else 
                    If fldErrorField.Type = dbDate Then 
                        strSQLSEL = strSQLSEL & " AND " & "[" & fldErrorField.Name & "] = " & "#" & strColumnValue & "#" 
                        strSQLINS = strSQLINS & " AND " & "[" & fldErrorField.Name & "] = " & "#" & strColumnValue & "#" 
                    Else 
                        If fldErrorField.Type = dbText Or fldErrorField.Type = dbChar Or fldErrorField.Type = dbMemo Then 
                            strSQLSEL = strSQLSEL & " AND " & "[" & fldErrorField.Name & "] = " & "'" & strColumnValue & "'" 
                            strSQLINS = strSQLINS & " AND " & "[" & fldErrorField.Name & "] = " & "'" & strColumnValue & "'" 
                        Else 
                            strSQLSEL = strSQLSEL & " AND " & "[" & fldErrorField.Name & "] = " & strColumnValue 
                            strSQLINS = strSQLINS & " AND " & "[" & fldErrorField.Name & "] = " & strColumnValue 
                        End If 
                    End If 
                End If 
            End If 
            intLoop = (intLoop + 1) 
            ' QJet limitation for maximum conditions is reached. 
            If intLoop = 39 Then 
                Exit For 
            End If 
        Next fldErrorField 
        On Error Resume Next 
        ' Create error table if it does not exist. 
        db.Execute strSQLSEL, dbFailOnError 
        If Err = 3010 Then 
            On Error GoTo ErrorHandler 
            ' Add rows to error table if it already exists. 
            db.Execute strSQLINS, dbFailOnError 
        End If 
        rsErrorTable.Close 
        rsMSysCompactError.MoveNext 
    Wend 
    rsMSysCompactError.Close 
    MsgBox "Done!" 
    Exit Sub 
ErrorHandler: 
    MsgBox "An error has occurred " & Err & " " & Error 
    Resume Next 
End Sub 

Any ideas?
Thanks, Chester
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