asp.net頁面出錯時的處理方法總結

1.第一種做法，在Web.config檔案配置

<system.web>
      <customErrors defaultRedirect="~/ErrorPage.aspx" 
                     mode="RemoteOnly">
      </customErrors>
</system.web>

 

  defaultRedirect屬性用來指明當aspx頁面發生了未處理錯誤時導向的頁面; 但Asp.net使用重新導向機制來重新導航錯誤頁面，這樣錯誤資訊就會丟失，也就是說我們用Server.GetLastError()獲得的Exception對象始終是空的。雖然可以提示使用者出錯，並提供一個返回出錯頁面的連結，卻不能給管理員一個很好的錯誤提示。

2.第二種做法：在global檔案裡的Application_Error方法中處理

代碼

protected void Application_Error(Object sender, EventArgs e)
        {
            Exception ex=Server.GetLastError().GetBaseException();

            string errorTime="發生時間："+DateTime.Now.ToString();
            string errorAddress="發生異常頁："+Request.Url.ToString();
            string errorInfo="異常資訊："+ex.Message;
            string errorSource="錯誤源："+ex.Source;
            string errorTrace="堆棧資訊："+ex.StackTrace;
            Server.ClearError();

            System.IO.StreamWriter writer=null;
            try
            {
                lock(this)
                {
                    //寫入日誌 
                    string year=DateTime.Now.Year.ToString();
                    string month=DateTime.Now.Month.ToString();
                    string day=DateTime.Now.Day.ToString();
                    string path=string.Empty;
                    string filename=DateTime.Now.ToString("yyyyMMdd")+".txt";
                    path=Server.MapPath("~/Error/")+year+month+day;
                    if(!Directory.Exists(path))
                    {
                        Directory.CreateDirectory(path);
                    }
                    System.IO.FileInfo file=new FileInfo(path+"/"+filename);
                    writer=new StreamWriter(file.FullName,true);//檔案不在則建立，true表示追加
                    writer.WriteLine("使用者IP:"+Request.UserHostAddress);
                    writer.WriteLine(errorTime);
                    writer.WriteLine(errorAddress);
                    writer.WriteLine(errorInfo);
                    writer.WriteLine(errorSource);
                    writer.WriteLine(errorTrace);
                    writer.WriteLine("-------------------------------------------------------");

                }
            }
            finally
            {
                if(writer!=null)
                {
                    writer.Close();
                }
            }
            Server.Transfer("~/ErrorPage.aspx"); //跳轉到顯示友好錯誤的頁面

        }

然後在ErrorPage.aspx頁面顯示一些好友的提示資訊.

3.第三種做法：在Page_Error事件裡面處理

代碼

        private void Page_Load(object sender, System.EventArgs e)
        {
            throw(new ArgumentNullException());
        }

        public void Page_Error(object sender,EventArgs e)
        {
            Exception ex=Server.GetLastError().GetBaseException();

            string errorTime="發生時間："+DateTime.Now.ToString();
            string errorAddress="發生異常頁："+Request.Url.ToString();
            string errorInfo="異常資訊："+ex.Message;
            string errorSource="錯誤源："+ex.Source;
            string errorTrace="堆棧資訊："+ex.StackTrace;

            Server.ClearError();

            System.IO.StreamWriter writer=null;
            try
            {
                lock(this)
                {
                    //寫入日誌 
                    string year=DateTime.Now.Year.ToString();
                    string month=DateTime.Now.Month.ToString();
                    string day=DateTime.Now.Day.ToString();
                    string path=string.Empty;
                    string filename=DateTime.Now.ToString("yyyyMMdd")+".txt";
                    path=Server.MapPath("~/Error/")+year+month+day;
                    if(!Directory.Exists(path))
                    {
                        Directory.CreateDirectory(path);
                    }
                    System.IO.FileInfo file=new FileInfo(path+"/"+filename);
                    writer=new StreamWriter(file.FullName,true);//檔案不在則建立，true表示追加
                    writer.WriteLine("使用者IP:"+Request.UserHostAddress);
                    writer.WriteLine(errorTime);
                    writer.WriteLine(errorAddress);
                    writer.WriteLine(errorInfo);
                    writer.WriteLine(errorSource);
                    writer.WriteLine(errorTrace);
                    writer.WriteLine("-------------------------------------------");

                }
            }
            finally
            {
                if(writer!=null)
                {
                    writer.Close();
                }
            }

            Server.ClearError();//防止錯誤繼續到要被處理的 Application_Error 事件中。
            Response.Redirect("~/ErrorPage.aspx");
            
        }

 

我經常的做法是使用第二種方法，然後再寫一個傳送簡訊的方法（調用移動的簡訊借口），這樣的話程式出錯的時候，管理員可以收到程式出錯的資訊。