WebClient ws = new WebClient();
ws.Credentials = new System.Net.NetworkCredential(username, password, domain);
ws.DownloadFile("https://xxxx.xxxx.com/xxxx.xml", @"C:WindowsTEMPDownloaded.xml");
I got error Object reference not set to an instance of an object . Anyone know why?
如果我把“https://xx.xx.com/xxxx.xml”复制到浏览器上,可以下载并节省到“C:WindowsTEMPDownloaded.xml”,但我的节目不能只留下错误。
此前,我使用同一代码成功地下载了档案,但这是另一个网站,有http://www.un.org。 无法确定这一问题的原因。
我在使用网上课时也存在同样的问题。 我确实是在建立国际投资协会,而不是像现在这样铺设道路(我在此没有这样做,但你还可以给UriBuilder增加用户名和密码):
var uriBuild = new UriBuilder { Host host, Path = downloadPath };
client.DownloadFileAsync(uriBuild.Uri, localPath);
东道和下载的道路是连续的,例如:
string host = "ftp.sunet.se"
string downloadPath = "/pub/unix/databases/relational/mysql/Downloads/MySQL-5.5/mysql-5.5.22-win32.msi"
Let me know if this also works for you! Cheers :)
1. 使用尿素而不是使用原始尿素
Uri URL = urlAddress.StartsWith("https://", StringComparison.OrdinalIgnoreCase) ? new Uri(urlAddress) : new Uri("https://" + urlAddress);
await myWebClient.DownloadFileTaskAsync(URL, location);
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