In this scenario it is possible that you do many open/write/close requests within a small amout of time. Note that some virusscanner return immediately to the close-caller, but keep the handle still open. To check this out: disable you scanner and try again...
Maybe its better to keep the file open and just write into it. Close the file when the process terminates. Peter ----- Original Message ----- From: "Alex Smotritsky" <[EMAIL PROTECTED]> To: <[email protected]> Sent: Sunday, February 05, 2006 1:57 PM Subject: [ADVANCED-DOTNET] System.IO.Exception | I'm working on some code to do some asynchronous logging to a text file. If | I open the file (manually) while it's being written to I get a | System.IO.Exception with the message "The process cannot access the file | (the path) because it is being used by another process. This happens | consistently with debug builds and much less with release builds. | | | | The file io I'm doing is not asynchronous, I say the logging is asynchronous | because I fire an event which a logging function subscribes to. | | | | I think I should be able to write to a file and not have an exception | generated when I manually open that file during some write operations but I | haven't figured out how to do that yet. TIA | | | | Here's the code (running against 1.0 of the framework): | | | | using System; | | using System.IO; | | | | namespace AsyncLog3 | | { | | class Class1 | | { | | private static object syncObject = new object(); | | private static int lineNum = 0; | | | | private delegate void MyDelegate(object sender, DenaliArgs | args); | | private static event MyDelegate MyEvent; | | | | static void Main() | | { | | MyEvent += new MyDelegate(WriteLog); | | | | if (MyEvent != null) | | { | | object sender = new object(); | | for (int i=0; i<1000000; i++) | | MyEvent(sender, new DenaliArgs("Hello, | World")); | | } | | } | | | | private static void WriteLog(object sender, DenaliArgs args) | | { | | string fileName = "MyLog.txt"; | | lock (syncObject) | | { | | using (FileStream fileStream = new | FileStream(fileName, FileMode.Append, FileAccess.Write, | FileShare.ReadWrite)) // System.IO.Exception in debug build | | { | // System.IO.Exception in release, points to disassembly, less frequent | | using (StreamWriter writer = new | StreamWriter(fileStream)) | | { | | writer.WriteLine("{0}: {1}", ++lineNum, | args.Str); | | Console.WriteLine("{0}: {1}", ++lineNum, | args.Str); | | writer.Flush(); | | } | | } | | } | | } | | } | | } | | | | | | | | | | | | | =================================== | This list is hosted by DevelopMentor® http://www.develop.com | | View archives and manage your subscription(s) at http://discuss.develop.com =================================== This list is hosted by DevelopMentor® http://www.develop.com View archives and manage your subscription(s) at http://discuss.develop.com
