StreamReader srReadLine = new StreamReader(File.OpenRead(file),System.Text.Encoding.GetEncoding("GB2312"));
   srReadLine.BaseStream.Seek(0, SeekOrigin.Begin);
         while (srReadLine.Peek() > -1)
  {
            Response.Write(Boxtohtml(srReadLine.ReadLine()));
Response.Write("<br>");
          }
         srReadLine.Close();