asp.net错误日志写入

当我们一个web项目开发已完成,测试也通过了后,就把他放到网上去,但是,bug是测不完的,特别是在一个大的网络环境下。那么,我们就应该记录这些错误,然后改正。这里,我的出错管理页面是在global.asax里面的,因为里面有一个Application_Error函数,我觉得这个就是管理错误的。其实,asp.net里还有一个方法,就是在 page 里指定出错的页面,由这个页面专门管理,我觉得这个方法也好,但是每次都要到相应的page里指定参数,不过,我觉得应该可以在web.config里配置吧。但是我还是喜欢下面的方法。下面我们就开始吧。
Global.asax代码:
<%@ Application Language="C#" %>

<script runat="server">

void Application_Start(object sender, EventArgs e) 
    {
        // 在应用程序启动时运行的代码

}
    
    void Application_End(object sender, EventArgs e) 
    {
        //  在应用程序关闭时运行的代码

}
        
    void Application_Error(object sender, EventArgs e) 
    { 
        // 在出现未处理的错误时运行的代码
        
            Exception objErr = Server.GetLastError().GetBaseException();
            string error = string.Empty;
            string errortime = string.Empty;
            string erroraddr = string.Empty;
            string errorinfo = string.Empty;
            string errorsource = string.Empty;
            string errortrace = string.Empty;

error += "发生时间:" + System.DateTime.Now.ToString() + "<br>";
            errortime = "发生时间:" + System.DateTime.Now.ToString();

error += "发生异常页: " + Request.Url.ToString() + "<br>";
            erroraddr = "发生异常页: " + Request.Url.ToString();

error += "异常信息: " + objErr.Message + "<br>";
            errorinfo = "异常信息: " + objErr.Message;

//error +="错误源:"+objErr.Source+"<br>";
            //error += "堆栈信息:" + objErr.StackTrace + "<br>";
            errorsource = "错误源:" + objErr.Source;
            errortrace = "堆栈信息:" + objErr.StackTrace;
            error += "--------------------------------------<br>";
            Server.ClearError();
            Application["error"] = error;

//独占方式,因为文件只能由一个进程写入.
           System.IO.StreamWriter writer=null;
            try
            {               
                lock (this)
                {
                    // 写入日志
                    string year = DateTime.Now.Year.ToString();
                    string month = DateTime.Now.Month.ToString();
                    string path = string.Empty;
                    string filename = DateTime.Now.Day.ToString() + ".txt";
                    path = Server.MapPath("~/Error/") + year + "/" + month;
                    //如果目录不存在则创建
                    if (!System.IO.Directory.Exists(path))
                    {
                        System.IO.Directory.CreateDirectory(path);
                    }
                    System.IO.FileInfo file = new System.IO.FileInfo(path + "/" + filename);
                    //if (!file.Exists)
                    //    file.Create();
                    //file.Open(System.IO.FileMode.Append);        
                    writer = new System.IO.StreamWriter(file.FullName, true);//文件不存在就创建,true表示追加
                    writer.WriteLine("用户IP:" + Request.UserHostAddress);
                    //if (Session["UserName"] != null)
                    //{
                    //    writer.WriteLine("用户名" + System.Web.HttpContext.Current.Session["UserName"].ToString());
                    //}
                    writer.WriteLine(errortime);
                    writer.WriteLine(erroraddr);
                    writer.WriteLine(errorinfo);
                    writer.WriteLine(errorsource);
                    writer.WriteLine(errortrace);
                    writer.WriteLine("--------------------------------------------------------------------------------------");
                    //writer.Close();
                }
            }
            finally 
            {
                if (writer != null)
                    writer.Close();
                    
            }    
            Response.Redirect("~/Error/ErrorPage.aspx");

}

void Session_Start(object sender, EventArgs e) 
    {
        // 在新会话启动时运行的代码
        Session.Timeout = 60;        
        if (Session.IsNewSession)
        {
            lock (this)
            {
                if (Application["Counts"] != null)
                {
                    Application["Counts"] = Int32.Parse(Application["Counts"].ToString()) + 1;
                }
                else
                {
                    Application["Counts"] = 1;
                }
            }
        }
    }

void Session_End(object sender, EventArgs e) 
    {
        // 在会话结束时运行的代码。 
        // 注意: 只有在 Web.config 文件中的 sessionstate 模式设置为
        // InProc 时,才会引发 Session_End 事件。如果会话模式设置为 StateServer 
        // 或 SQLServer,则不会引发该事件。
        if (Application["Counts"] != null)
        {
            Application["Counts"] = Int32.Parse(Application["Counts"].ToString())-1;
        }        
    }
       
</script>

显示出错信息的页面
ErrorPage.aspx代码:
<%@ Page Language="C#" AutoEventWireup="true" CodeFile="ErrorPage.aspx.cs" Inherits="Error_ErrorPage" %>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<html xmlns="http://www.w3.org/1999/xhtml" >
<head runat="server">
    <title>出错信息</title>
    <link href="css/SITE.CSS" type="text/css" rel="stylesheet" />   
</head>
<body>
    <form id="form1" runat="server">
        <asp:Label ID="Label1" runat="server" Width="568px"></asp:Label>
    
    </form>
</body>
</html>

ErrorPage.aspx.cs
 protected void Page_Load(object sender, EventArgs e)
    {
        this.Label1.Text = Application["Error"].ToString();
    }

这篇源于网络,网址已经忘记,敬请谅解!

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