图像没有被c#下载，WebRequest.Create(url.AbsoluteUri)作为HttpWebRequest

Question

以前所有的图片都可以通过使用

从不同的网站下载

  var request = WebRequest.Create(url.AbsoluteUri) as HttpWebRequest;  

但是现在，我遇到了一个网站

http://www.euroman.dk/gadgets - og design/det onsker - vi os/skyd - 360 -视频-地中海- din iphone/

这个图片的URL是不可下载的

http://www.euroman.dk/imagecropper.ashx?f=%2fUpload%2feuroman-dk%2fgadgets-og-design%2f2013%2520maj%2fthedot_01.jpg& w = 643和h = 405, m = 1

谁能告诉我原因是什么?

Answer 1

您的站点需要一个User-Agent标题

string url = "http://www.euroman.dk/imagecropper.ashx?f=%2fUpload%2feuroman-dk%2fgadgets-og-design%2f2013%2520maj%2fthedot_01.jpg&w=643&h=405&m=1";
using (WebClient wc = new WebClient())
{
    wc.Headers["User-Agent"] = "Mozilla/5.0 (Windows; U; Windows NT 6.1; de; rv:1.9.2.12) Gecko/20101026 Firefox/3.6.12";
    byte[] data = wc.DownloadData(url);
}

Answer 2

可以设置更大的值

request.Timeout = 5000;
request.ReadWriteTimeout = 20000;