C#，无法设置DownloadFile()超时

Question

我需要下载一些大文件，所以我需要比默认的1分钟更长的DownloadFile（）超时时间。

问题是我的解决方案没有增加超时时间。它停留在1分钟。

我创建了这个类：

public class MyWebClient : WebClient
{
    private int timeout;
    
    public int Timeout
    {
        get
        {
            return timeout;
        }
        set
        {
            timeout = value;
        }
    }
    public MyWebClient()
    {
        this.timeout = 1200000;
    }
    protected override WebRequest GetWebRequest(Uri uri)
    {
        WebRequest w = base.GetWebRequest(uri);
        w.Timeout = this.timeout;
        return w;
    }
}

这样称呼它：

using (MyWebClient client = new MyWebClient())
{
    client.Timeout = 1200000;
    client.DownloadFile(new Uri(fileUrl), localFile);
}

有什么想法吗？

Answer 1

在客户端请求中尝试此代码

using (MyWebClient client = new MyWebClient())
{
  client.Timeout = 1200000;
  byte[] data = client.DownloadData(url);
  File.WriteAllBytes(localFile, data);    
}

Answer 2

将您的代码更改为以下

private class MyWebClient : WebClient
{
    public int Timeout { get; set; }
    protected override WebRequest GetWebRequest(Uri uri)
    {
        WebRequest w = base.GetWebRequest(uri);
        w.Timeout = Timeout;
        ((HttpWebRequest) w).ReadWriteTimeout = Timeout;
        return w;
    }
}

按照你提到的打电话。

更新时间：--其他明智的用途如下

HttpWebRequest req = (HttpWebRequest)WebRequest.Create(Url);
req.Timeout = 1200000;
req.ReadWriteTimeout = 1200000;
var w = (HttpWebResponse)req.GetResponse();
using (Stream file = File.OpenWrite(localFile))
{
    w.GetResponseStream().CopyTo(file);
}