[英]How to Set TimeOut for WebClient on .net?
我下載了一些文件,但我也想為webclient設置超時。 我看到沒有變化只是我們可以使用重寫WebRequest。 我已經做了但它不起作用。 我的意思是重寫GetWebRequest方法不起作用..這是我的代碼
public class VideoDownloader : Downloader
{
/// <summary>
/// Initializes a new instance of the <see cref="VideoDownloader"/> class.
/// </summary>
/// <param name="video">The video to download.</param>
/// <param name="savePath">The path to save the video.</param>
public VideoDownloader(VideoInfo video, string savePath)
: base(video, savePath)
{ }
/// <summary>
/// Starts the video download.
/// </summary>
public override void Execute()
{
// We need a handle to keep the method synchronously
var handle = new ManualResetEvent(false);
var client = new WebClient();
client.DownloadFileCompleted += (sender, args) => handle.Set();
client.DownloadProgressChanged += (sender, args) =>
this.OnProgressChanged(new ProgressEventArgs(args.ProgressPercentage));
this.OnDownloadStarted(EventArgs.Empty);
client.DownloadFileAsync(new Uri(this.Video.DownloadUrl), this.SavePath);
handle.WaitOne();
handle.Close();
this.OnDownloadFinished(EventArgs.Empty);
}
protected override WebRequest GetWebRequest(Uri address)
{
WebRequest w = base.GetWebRequest(address);
w.Timeout = 10*1000; // 20 * 60 * 1000;
return w;
}
}
和下載課程
public abstract class Downloader: WebClient
{
/// <summary>
/// Initializes a new instance of the <see cref="Downloader"/> class.
/// </summary>
/// <param name="video">The video to download/convert.</param>
/// <param name="savePath">The path to save the video/audio.</param>
protected Downloader(VideoInfo video, string savePath)
{
this.Video = video;
this.SavePath = savePath;
}
protected override WebRequest GetWebRequest(Uri address)
{
WebRequest w = base.GetWebRequest(address);
w.Timeout = 10 * 1000; // 20 * 60 * 1000;
return w;
}
/// <summary>
/// Occurs when the download finished.
/// </summary>
public event EventHandler DownloadFinished;
/// <summary>
/// Occurs when the download is starts.
/// </summary>
public event EventHandler DownloadStarted;
/// <summary>
/// Occurs when the progress has changed.
/// </summary>
public event EventHandler<ProgressEventArgs> ProgressChanged;
/// <summary>
/// Gets the path to save the video/audio.
/// </summary>
public string SavePath { get; private set; }
/// <summary>
/// Gets the video to download/convert.
/// </summary>
public VideoInfo Video { get; private set; }
/// <summary>
/// Starts the work of the <see cref="Downloader"/>.
/// </summary>
public abstract void Execute();
protected void OnDownloadFinished(EventArgs e)
{
if (this.DownloadFinished != null)
{
this.DownloadFinished(this, e);
}
}
protected void OnDownloadStarted(EventArgs e)
{
if (this.DownloadStarted != null)
{
this.DownloadStarted(this, e);
}
}
protected void OnProgressChanged(ProgressEventArgs e)
{
if (this.ProgressChanged != null)
{
this.ProgressChanged(this, e);
}
}
}
我的錯誤在哪里? 注意:我想下載異步
來自MSDN Doc:
Timeout屬性僅影響使用GetResponse方法發出的同步請求。 要使異步請求超時,請使用Abort方法。
因此,如果您要執行異步請求,我認為您需要管理自己的計時器,並在任何時間段后在實例上調用.Abort()。
在此MSDN頁面上有一些示例代碼顯示.Abort()
方法。
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