Hi Karl,
I've tried to add SyncLock and EndLock. The code looks like this :
If aLogfile.Exists Then
Dim objStreamWriter as StreamWriter
objStreamWriter = File.AppendText(LogFile)
Dim strLine as string= CurrYear & CurrMonth & CurrDay &
CurrHour & CurrMin & CurrSec & " " & radioFileUp.selectedValue & " " &
Session("UserID") & " " & Carrier & " " & fn & " " & fsize & " bytes "
SyncLock objStreamWriter.WriteLine(strLine)
End SyncLock
objStreamWriter.Close()
Else
Dim objStreamWriter as StreamWriter = File.CreateText(LogFile)
Dim strLine as string= CurrYear & CurrMonth & CurrDay &
CurrHour & CurrMin & CurrSec & " " & radioFileUp.selectedValue & " " &
Session("UserID") & " " & Carrier & " " & fn & " " & fsize & " bytes "
SyncLock objStreamWriter.WriteLine(strLine)
End SyncLock
objStreamWriter.Close()
End If
I've got the error like this :
Compilation Error
Description: An error occurred during the compilation of a resource required
to service this request. Please review the following specific error details
and modify your source code appropriately.
Compiler Error Message: BC30491: Expression does not produce a value.
Source Error:
Line 202: Dim strLine as string= CurrYear & CurrMonth & CurrDay &
CurrHour & CurrMin & CurrSec & " " & radioFileUp.selectedValue & " " &
Session("UserID") & " " & Carrier & " " & fn & " " & fsize & " bytes "
Line 203:
Line 204: SyncLock objStreamWriter.WriteLine(strLine)
Line 205: End SyncLock
Line 206: objStreamWriter.Close()
Any suggestions ??? Thanks.
====================================
"Karl Seguin" <karl REMOVE @ REMOVE openmymind REMOVEMETOO . ANDME net>
wrote in message news:OP**************@TK2MSFTNGP10.phx.gbl...
Yes...you can have a file lock condition. You'll need to serialize
access to the code. I think in VB.Net you can wrap the offending code in a
SynchLock statement:
http://msdn.microsoft.com/library/de...tmSyncLock.asp
Also, why reinvent the wheel?
http://logging.apache.org/log4net/
Karl
--
MY ASP.Net tutorials
http://www.openmymind.net/
"HNguyen" <bi********@yahoo.com> wrote in message
news:%2******************@TK2MSFTNGP14.phx.gbl... Hi,
I have a Web application in ASP.NET. My Application allows the users upload files into the server after checking their user names and passwords.
For each transaction, the Web program will write the information about user
name, filename upload, filesize, date and time of uploading into the log
file. (The name of the log file is constructed by Current Year and
Current Month in my program). Is there any problems with writing into the log
file if there are multi-users access on the same page to upload files ????.
My program works OK with the code below, but I don't know if there is any
problems when multi-users perform writing into the same log file at the
same time ??? Here is a part of my code to open the log file for editing
:
'WRITE LO LOG FILE
Dim strFile as string= CurrYear & CurrMonth
Dim LogFile As String = Server.MapPath("LOGS") & "\" & strFile &
".log"
Dim aLogfile As FileInfo = New FileInfo(LogFile)
If aLogfile.Exists Then
Dim objStreamWriter as StreamWriter
objStreamWriter = File.AppendText(LogFile)
Dim strLine as string= CurrYear & CurrMonth & CurrDay &
CurrHour & CurrMin & CurrSec & " " & radioFileUp.selectedValue & " " &
Session("UserID") & " " & Carrier & " " & fn & " " & fsize & " bytes "
objStreamWriter.WriteLine(strLine)
objStreamWriter.Close()
Else
Dim objStreamWriter as StreamWriter = File.CreateText(LogFile)
Dim strLine as string= CurrYear & CurrMonth & CurrDay &
CurrHour & CurrMin & CurrSec & " " & radioFileUp.selectedValue & " " &
Session("UserID") & " " & Carrier & " " & fn & " " & fsize & " bytes "
objStreamWriter.WriteLine(strLine)
objStreamWriter.Close()
End If
Please give me some advises. Do I need to change anything in my code
for it ?. Thanks in advance.