asp.net 错误信息记录到日志文件

昨天正式给上司汇报工作,大部分还比较满意.说道错误信息的处理方式怎么处理时有没有做错误日志;没,那就参考公司的的错误日志类操作类吧.

在global.asax里面添加也是实现HttpApplication的application_error事件

void Application_Error(object sender, EventArgs e) 
    { 
        // Code that runs when an unhandled error occurs
        // 在出现未处理的错误时运行的代码
        string errorLog = Server.MapPath("~/App_Data/Error.log");
        System.IO.FileStream fs = new System.IO.FileStream(errorLog, System.IO.FileMode.Append, System.IO.FileAccess.Write);
        System.IO.StreamWriter sw = new System.IO.StreamWriter(fs);
        Exception ex = Server.GetLastError();
        string IP = "";//客户端IP
        HttpRequest request = HttpContext.Current.Request;
        string result = request.ServerVariables["HTTP_X_FORWARDED_FOR"];
        if (null == result || result == String.Empty)
        {
            IP = request.ServerVariables["REMOTE_ADDR"];
        }
        else if (request.ServerVariables["HTTP_VIA"] != null)
        {
            IP = request.ServerVariables["HTTP_X_FORWARDED_FOR"].ToString().Split(',')[0].Trim();
        }
        else
        {
            IP = request.UserHostAddress;
        }
        if (ex.InnerException != null)
        {
            sw.WriteLine("IP:{0}\n时间:{1}\n错误消息:{2}\n位置:{3}\n地址：{4}\n\n", IP,DateTime.Now.ToString("yyyy年MM月dd日 HH:mm:ss ffff"), ex.ToString(), ex.InnerException, Request.Url.AbsolutePath);
        }
        else if (ex != null)
        {
            sw.WriteLine("IP:{0}\n时间:{1}\n错误消息:{2}\n地址：{3}\n\n", IP,DateTime.Now.ToString("yyyy年MM月dd日 HH:mm:ss ffff"), ex.ToString(), Request.Url.AbsolutePath);
        }
        else
        {
            sw.WriteLine("未知错误");
        }
        Server.ClearError();
        sw.Close(); 
    }

当然还要在app_data目录下新建一个error_log.txt文件