c# - 使用asp.net检查日志文件大小和日志写入

Question

我想在用 asp.net webforms 设计的 web 应用程序中记录错误。

目前我使用以下代码在引发异常时记录错误

void Application_Error(object sender, EventArgs e) 
    { 

        // Code that runs when an unhandled error occurs


            Exception exc = Server.GetLastError();

            // Include enterprise logic for logging exceptions 
            // Get the absolute path to the log file 
            string logFile = "~/App_Data/ErrorLog.txt";
            logFile = HttpContext.Current.Server.MapPath(logFile);

            // Open the log file for append and write the log
            using (StreamWriter sw = new StreamWriter(logFile, true))
            {
                sw.WriteLine("********** {0} **********", DateTime.Now);
                if (exc.InnerException != null)
                {
                    sw.Write("Inner Exception Type: ");
                    sw.WriteLine(exc.InnerException.GetType().ToString());
                    sw.Write("Inner Exception: ");
                    sw.WriteLine(exc.InnerException.Message);
                    //sw.Write("Inner Source: ");
                    sw.WriteLine(exc.InnerException.Source);
                    if (exc.InnerException.StackTrace != null)
                    {
                      //  sw.WriteLine("Inner Stack Trace: ");
                      //  sw.WriteLine(exc.InnerException.StackTrace);
                    }
                }

                sw.Write("Exception Type: ");
                sw.WriteLine(exc.GetType().ToString());
                sw.WriteLine("Exception: " + exc.Message);
                // sw.WriteLine("Source: " + source);
                //sw.WriteLine("Stack Trace: ");
                if (exc.StackTrace != null)
                {
                 //   sw.WriteLine(exc.StackTrace);
                  //  sw.WriteLine();
                }
                // sw.Close();
            }

    }

我如何修改这段代码，以便我可以先检查文件大小，看看它是否已达到 1MB 大小。如果日志文件已达到 1MB 大小，那么我将创建另一个带有日期标签等的文件。

Answer 1

您可以这样使用 FileInfo:

FileInfo fi = new FileInfo(logFile);
if(fi.length > 1024) {
    // create new file
}