路径问题 Global文件中写入错误日志记录

  protected  void Application_Error(object sender,EventArgs e)
        {
            Exception lastError = Server.GetLastError();
            if(lastError!=null)
            {
                string strExceptionMessage = string.Empty;
                //对HTTP 404做额外处理，其他错误全部当成500服务器错误
                HttpException httpError = lastError as HttpException;
                if(httpError!=null)
                {
                    //获取错误代码
                    int httpCode = httpError.GetHttpCode();
                    strExceptionMessage = httpError.Message;
                    if(httpCode==400||httpCode==403||httpCode==404)
                    {
                        Response.StatusCode = httpCode;
                        //跳转到指定的静态404信息页面
                        Response.WriteFile("~/404.html");
                        Server.ClearError();
                        return;
                    }
                }
                log.Error(lastError.Message, lastError);
                Response.WriteFile("~/400.html");
#if DEBUG

#else
                Server.ClearError();
#endif


            }
        }