Asp.net(c#)实现多线程断点续传

以前一直错误的认为在ASP.NET中无法通过编程方式实现多线程断点续传，今天终于获得了这样一个解决方案，让我明白要学习的东西还很多 。此解决方案基于其它解决方案及相关资料，根据我自己的理解改进.如有错漏，请尽管指出 ;如有其它更好的解决方案，请推荐一下 ，感谢先。

System.IO.Stream iStream = null;            // Buffer to read 10K bytes in chunk:            byte[] buffer = new Byte[10240];            // Length of the file:            int length;            // Total bytes to read:            long dataToRead;            // Identify the file to download including its path.            string filepath  = @"E:/software/SQL Server 2000 Personal Edition.ISO";            // Identify the file name.            string  filename  = System.IO.Path.GetFileName(filepath);            try            {                // Open the file.                iStream = new System.IO.FileStream(filepath, System.IO.FileMode.Open,                     System.IO.FileAccess.Read,System.IO.FileShare.Read);                Response.Clear();                // Total bytes to read:                dataToRead = iStream.Length;                long p = 0;                if(Request.Headers["Range"]!=null)                {                    Response.StatusCode = 206;                    p = long.Parse( Request.Headers["Range"].Replace("bytes=","").Replace("-",""));                }                if(p != 0)                {                    Response.AddHeader("Content-Range","bytes " + p.ToString() + "-" + ((long)(dataToRead - 1)).ToString() + "/" + dataToRead.ToString());                                    }                Response.AddHeader("Content-Length",((long)(dataToRead-p)).ToString());                Response.ContentType = "application/octet-stream";                Response.AddHeader("Content-Disposition", "attachment; filename=" + System.Web.HttpUtility.UrlEncode(Request.ContentEncoding.GetBytes(filename)));                iStream.Position = p;                dataToRead = dataToRead - p;                // Read the bytes.                while (dataToRead > 0)                {                    // Verify that the client is connected.                    if (Response.IsClientConnected)                     {                        // Read the data in buffer.                        length = iStream.Read(buffer, 0, 10240);                        // Write the data to the current output stream.                        Response.OutputStream.Write(buffer, 0, length);                        // Flush the data to the HTML output.                        Response.Flush();                        buffer= new Byte[10240];                        dataToRead = dataToRead - length;                    }                    else                    {                        //prevent infinite loop if user disconnects                        dataToRead = -1;                    }                }            }            catch (Exception ex)             {                // Trap the error, if any.                Response.Write("Error : " + ex.Message);            }            finally            {                if (iStream != null)                 {                    //Close the file.                    iStream.Close();                }                   Response.End();            }

本解决方案所参考的资料链接列表(在此对作者表示感谢)：http://blog.csdn.net/playyuer/archive/2004/08/02/58430.aspxhttp://www.httpsniffer.com/http/1416.htmhttp://support.microsoft.com/default.aspx?scid=kb;en-us;812406&Product=aspnet更新：        此解决方案已根据playyuer 提出的问题作了更新，另外在输出前调用了Response.Clear();方法。