asp.net实现的计算网页下载速度的方法

作者:Kaka 时间:2011-6-11 23:8:19 浏览: 评论:7

刚看到有人给出asp.net实现的计算网页下载速度的方法，本方法未经本人测试，不知道能否可靠性如何。准确来说，这只是个思路吧。

      private   void   getSpeed()
      {
      //链接开始时间
      DateTime   stime   =   DateTime.Now;
      //文件
      string   url   =   "http://xxx.com/images/test.jpg ";
      WebRequest   myRequest   =   WebRequest.Create(url);
      //链接成功
      WebResponse   myReponse   =   myRequest.GetResponse();
      //取得文件的大小　字节单位
      int   ii   =   int.Parse(myReponse.ContentLength.ToString());
      //取得流
      Stream   myStream   =   myReponse.GetResponseStream();
      StreamReader   sr   =   new   StreamReader(myStream);
      byte[]   mbyte=new   byte[ii];
      int   allbyte=(int)mbyte.Length;
      int   startbyte=0;
      string   test   =   " ";
      while(ii> 0)     //################       循环读取文件,并显示进度.....
      {
      int   m=myStream.Read(mbyte,startbyte,allbyte);
      if(m==0){break;}
      startbyte+=m;
      allbyte-=m;
      int   a1=(int)startbyte/1024;
      int   a2=(int)ii/1024;
      test+= "连接成功..开始下载..m= "+m+ "| "   +   a1.ToString()   +   "/ "   +   a2.ToString()   +   "KB ";//startbyte   +   "/ "   +   ii.ToString();
      }
      //链接结束时间
      DateTime   etime=DateTime.Now;
      TimeSpan   ts   =   etime   -   stime;
      //总共耗时　
      double   SpeedTime   =   (double)   ts.TotalSeconds;
      double   Kbps   =   0;
      double   ShowPer   =   0;
      if   (SpeedTime> 0)
      {
      //网络速度
      Kbps   =   Math.Round(Math.Round(ii*8/1024/SpeedTime*10.5)/10);
      //Kbps   =   Math.Round(ii/1024/   SpeedTime);
      }
      else
      {
      Kbps   =   10000;
      }
      //用来显示当前流量所要显示的图片长度
      ShowPer   =   Math.Round(Kbps/100);
      if   (ShowPer <1)
      ShowPer   =   1;
      else   if(ShowPer> 82)
      ShowPer   =   82;
      //网络速度
      string   sp   =   (Math.Round(Kbps/8*10)/10).ToString();
      sr.Close();
      myStream.Close();
      myReponse.Close();
      // Response.Write(test);
      Response.Write( "网络速度 "+sp+ "图片长度$ "+ShowPer+ "耗时$ "+SpeedTime+ "文件大小$ "+ii);
      Response.End();
      }