1.第一種做法，在Web.config文件配置

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

?

? defaultRedirect屬性用來指明當(dāng)aspx頁面發(fā)生了未處理錯(cuò)誤時(shí)導(dǎo)向的頁面; 但Asp.net使用重定向機(jī)制來重新導(dǎo)航錯(cuò)誤頁面，這樣錯(cuò)誤信息就會(huì)丟失，也就是說我們用Server.GetLastError()獲得的Exception對(duì)象始終是空的。雖然可以提示用戶出錯(cuò)，并提供一個(gè)返回出錯(cuò)頁面的鏈接，卻不能給管理員一個(gè)很好的錯(cuò)誤提示。

2.第二種做法：在global文件里的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(fā)生時(shí)間："+DateTime.Now.ToString();
????????????string?errorAddress="發(fā)生異常頁："+Request.Url.ToString();
????????????string?errorInfo="異常信息："+ex.Message;
????????????string?errorSource="錯(cuò)誤源："+ex.Source;
????????????string?errorTrace="堆棧信息："+ex.StackTrace;
????????????Server.ClearError();

????????????System.IO.StreamWriter?writer=null;
????????????try
????????????{
????????????????lock(this)
????????????????{
????????????????????//寫入日志?
????????????????????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);//文件不在則創(chuàng)建，true表示追加
????????????????????writer.WriteLine("用戶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(zhuǎn)到顯示友好錯(cuò)誤的頁面

????????}

然后在ErrorPage.aspx頁面顯示一些好友的提示信息.

3.第三種做法：在Page_Error事件里面處理

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(fā)生時(shí)間："+DateTime.Now.ToString();
????????????string?errorAddress="發(fā)生異常頁："+Request.Url.ToString();
????????????string?errorInfo="異常信息："+ex.Message;
????????????string?errorSource="錯(cuò)誤源："+ex.Source;
????????????string?errorTrace="堆棧信息："+ex.StackTrace;

????????????Server.ClearError();

????????????System.IO.StreamWriter?writer=null;
????????????try
????????????{
????????????????lock(this)
????????????????{
????????????????????//寫入日志?
????????????????????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);//文件不在則創(chuàng)建，true表示追加
????????????????????writer.WriteLine("用戶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(cuò)誤繼續(xù)到要被處理的?Application_Error?事件中。
????????????Response.Redirect("~/ErrorPage.aspx");
????????????
????????}

?

我經(jīng)常的做法是使用第二種方法，然后再寫一個(gè)發(fā)送短信的方法（調(diào)用移動(dòng)的短信借口），這樣的話程序出錯(cuò)的時(shí)候，管理員可以收到程序出錯(cuò)的信息。

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