public class DownloadThread

    { 

        private string saveFilePath;

        private Uri downUrl;

        private long block;

        private int threadId = -1;

        private long downLength;

        private bool finish = false;

        private FileDownloader downloader;



        public DownloadThread(FileDownloader downloader, Uri downUrl, string saveFile, long block, long downLength, int threadId)

        {

            this.downUrl = downUrl;

            this.saveFilePath = saveFile;

            this.block = block;

            this.downloader = downloader;

            this.threadId = threadId;

            this.downLength = downLength;

        }





        public void ThreadRun()

        {

            //task

            Thread td = new Thread(new ThreadStart(() =>

            {

                Console.WriteLine(threadId.ToString() + " start  " + downLength.ToString() + "      " + block.ToString());

                if (downLength < block)//未下载完成

                {

                    try

                    {

                        int startPos = (int)(block * (threadId - 1) + downLength);//开始位置

                        int endPos = (int)(block * threadId - 1);//结束位置

                        Console.WriteLine("Thread " + this.threadId + " start download from position " + startPos + "  and endwith " + endPos);

&nbs