ASP.NET错误处理 日志记录

Java有log4j记录错误日志,而asp.net可以自己写一个来记录错误日志!

1. 先封装一个类

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;

using System.IO;
using System.Globalization;


/// <summary>
/// ErrHandler 错误日志处理类
/// </summary>
public class ErrHandler
{
    public ErrHandler()
    {
        //
        // TODO: Add constructor logic here
        //
    }
    public static void WriteError(Exception e)
    {
        try
        {
            ///错误日志记录地址[每天产生一个日志文件]
            string path = "~/Error/" + DateTime.Today.ToString("dd-MM-yy") + ".log";
            if (!File.Exists(System.Web.HttpContext.Current.Server.MapPath(path)))
            {
                ///不存在该日志,则创建
                File.Create(System.Web.HttpContext.Current.Server.MapPath(path)).Close();
            }
            ///写日志记录
            using (StreamWriter w = File.AppendText(System.Web.HttpContext.Current.Server.MapPath(path)))
            {
                w.WriteLine("Error Recode:");
                w.WriteLine("\tError Time:{0}", DateTime.Now.ToString(CultureInfo.InvariantCulture));
                w.WriteLine("\tError Address:" + System.Web.HttpContext.Current.Request.Url.ToString());
                w.WriteLine("\tTargetSite:" + e.TargetSite);
                w.WriteLine("\tError Message:" + e.Message);
                w.WriteLine("\tError HelpLink:" + e.HelpLink);
                w.WriteLine("\tError StackTrace:" + e.StackTrace);
                w.WriteLine("************************************************************************************");
                w.WriteLine("\r\n\r\n");
                w.Flush();
                w.Close();
            }
        }
        catch (Exception ex)
        {
            WriteError(ex);
        }
    }

}

 

2.. 类写好了！哪里调用呢?  新建个Global.asax文件吧!

<%@ Application Language="C#" %>
<script runat="server">

    void Application_Start(object sender, EventArgs e) 
    {
        // Code that runs on application startup

    }
    
    void Application_End(object sender, EventArgs e) 
    {
        //  Code that runs on application shutdown
        
    }
        
    void Application_Error(object sender, EventArgs e) 
    { 
        //获取最后的错误
        Exception objErr = Server.GetLastError().GetBaseException();
        // 这里开始记录咯
        ErrHandler.WriteError(objErr);

        //清除前一个错误

        Server.ClearError();
    }

    void Session_Start(object sender, EventArgs e) 
    {
        // Code that runs when a new session is started
        
    }

    void Session_End(object sender, EventArgs e) 
    {
        // Code that runs when a session ends. 
        // Note: The Session_End event is raised only when the sessionstate mode
        // is set to InProc in the Web.config file. If session mode is set to StateServer 
        // or SQLServer, the event is not raised.

    }
       
</script>

这样只要一发生错误了，都会记录到日志里面! 你只需定期去检查错误日志了

当然你也可以在错误中记录,如:

try
        {
            throw new Exception("Error");
        }
        catch (Exception ex)
        {
            ErrHandler.WriteError(ex);
        }

OVER

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