Question

我想使用Windows窗体应用程序中的线程在C＃中下载文件，线程在第一次工作正常（持续5秒）但是突然它使其工作并且有时不响应大约10秒然后它返回第二个并且然后没有回应我正在使用类下载文件这是代码：

 class DownloadFile
{

    #region Fields

    static Double totalsize;
    Double received;
    int PartNum;
    long start, end;
    string savepath;
    HttpWebRequest request;

    Stream stream;
    #endregion

    #region Constructors
    public DownloadFile() { totalsize = 1; received = 0; }
    public DownloadFile(long s, long e, string PATH, HttpWebRequest REQUEST, int Partnumber)
    {
        totalsize = 1;
        PartNum = Partnumber;
        received = 0;
        start = s;
        request = REQUEST;
        end = e;
        savepath = PATH;

    }
    #endregion

    #region Methods
    public void DownLoad()
    {
        int bytesRead = 0;
        byte[] buffer = new byte[1024];
        FileStream fstr = new FileStream(savepath + "Part_" + PartNum + Path.GetExtension(Request.RequestUri.ToString()), FileMode.Create, FileAccess.Write);
        HttpWebResponse response;
        this.request.AddRange(start, end);
        response = (HttpWebResponse)this.Request.GetResponse();
        stream = response.GetResponseStream();
        totalsize = this.end;
        bytesRead = stream.Read(buffer, 0, buffer.Length);
        while (bytesRead > 0)
        {
            received += bytesRead;
            fstr.Write(buffer, 0, bytesRead);
            bytesRead = stream.Read(buffer, 0, buffer.Length);
        }
        fstr.Close();
        stream.Close();
    }
    public void AppendFiles()
    {

    }
    #endregion

    #region properties
    public long End
    {
        get { return end; }
        set { end = value; }
    }

    public long Start
    {
        get { return start; }
        set { start = value; }
    }
    public Double Received
    {
        get { return received; }
    }
    public Double Totalsize
    {
        get { return totalsize; }
    }
    public HttpWebRequest Request
    {
        get { return request; }
        set { request = value; }
    }

    public string SavePath
    {
        get { return savepath; }
        set { savepath = value; }
    }
    #endregion

}

这里是线程开始的地方：

Class Program{
List<DownloadFile> DownLoadList = new List<DownloadFile>();
 public void DownloadMethod()
    {
        for (int i = 0; i < DownLoadList.Count; i++)
        {
            new Thread(new ThreadStart(DownLoadList.ElementAt(i).DownLoad)).Start();
        }

    }
}

我还有一个更新下载表单的计时器（progressBar和标签）

线程的响应时间非常多（不常见）

0 个答案: