by Raghuraja. C (21 Submissions)
Category: Miscellaneous
Compatability: VB 6.0
Difficulty: Unknown Difficulty
Originally Published: Thu 17th February 2005
Date Added: Mon 8th February 2021
Rating: 
(1 Votes)
Function to Create Automatic Log file and create new log file if it reaches 5 MB size - Passing Message as parameter
VBcoders
'This function writes the error message to the log file
On Error GoTo LOCALERRORHABNDLER
Dim objToFSO As New FileSystemObject
Dim objFile As File 'A file of the folder
Dim strLogFolder As String
Dim strFileName As String
Dim strBkupFile As String 'Backup file name
Const FILESIZE As Double = 5120000 '5 MB
LOGPROCESS:
'To construct the Error Message
strMessage = Format(Now, "YYYYMMDDHHMMSS") & " : " & Trim(strMessage) & vbCrLf
If Trim(LOGFOLDER) = "" Then
strLogFolder = App.Path & "\Log"
Else
If InStr(1, LOGFOLDER, ":\") > 0 Then
strLogFolder = LOGFOLDER
Else
strLogFolder = App.Path & "\" & LOGFOLDER
End If
End If
If fnCHKFILE(strLogFolder, True) = False Then
objToFSO.CreateFolder strLogFolder
End If
strFileName = strLogFolder & "\log.txt"
If objToFSO.FileExists(strFileName) Then
Set objFile = objToFSO.GetFile(strFileName)
'File size excceds the limit, then take a backup
If objFile.Size > FILESIZE Then
strBkupFile = Left(strFileName, Len(strFileName) - 4)
strBkupFile = strBkupFile & "_" & Format(Now, "YYYYMMDDHHMM") & ".txt"
objFile.Copy strBkupFile, True
objFile.Delete True
objToFSO.CreateTextFile (strFileName)
End If
Else
'if the file does not exists then it is created
objToFSO.CreateTextFile (strFileName)
Set objFile = objToFSO.GetFile(strFileName)
End If
Set objToFSO = Nothing
Set objFile = Nothing
Call fnMAKEFILE(strFileName, strMessage, True)
fnERRLOG = True
Exit Function
LOCALERRORHABNDLER:
If Err.Number = 76 Or Err.Number = 52 Then
LOGFOLDER = ""
GoTo LOGPROCESS
End If
Set objFile = Nothing
fnERRLOG = False
End Function
'=============================================
Public Function fnMAKEFILE(strFileName As String, strTOWRITE As String, Optional blnAPPMODE As Boolean) As Boolean
'---------------------------------------------------------
'This function will Create XML file
'---------------------------------------------------------
On Error GoTo LOCALERRORHANDLER
Dim intFNum As Double 'File number of opened file
intFNum = FreeFile
'Create or Append a file
'---------------------------------------------------------
If blnAPPMODE Then
Open strFileName For Append As #intFNum
Else
'---------------------------------------------------------
Open strFileName For Output As #intFNum
End If
'---------------------------------------------------------
Print #intFNum, strTOWRITE;
Close #intFNum
'---------------------------------------------------------
fnMAKEFILE = True
Exit Function
LOCALERRORHANDLER:
Close #intFNum
End Function
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