使用asp.net记录文件大小检查和日志写入

时间:2016-01-04 08:49:16

标签: c# asp.net

我想在asp.net webforms中设计的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();
            }

    }

如何修改此代码,以便我可以先检查文件大小,看它是否达到1MB大小。如果logfile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。

2 个答案:

答案 0 :(得分:2)

您可以这样使用FileInfo:

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

答案 1 :(得分:1)

另一个选择是使用强大的日志库,例如np.random.permutation。它允许您为日志文件指定NLog,并自动maximum file size

如您所见,这些选项和许多其他选项都是基于xml配置自动处理的。