WebProxy错误：需要代理身份验证(WebProxy error: Proxy Authenti

我使用下面的代码从互联网obtaing HTML数据：

WebProxy p = new WebProxy("localproxyIP:8080", true);
p.Credentials = new NetworkCredential("domain\\user", "password");
WebRequest.DefaultWebProxy = p;
WebClient client = new WebClient();
string downloadString = client.DownloadString("http://www.google.com");

但是，下面的错误出现：“需要代理身份验证”。 我不能从Windows服务，不存在用于默认代理设置的特别帐户使用默认的代理，因为我的代码运行的。 所以，我想specidy在我的代码的所有代理设置。 请咨询我如何解决这个错误。

Answer 1:

您对设置WebClient.Proxy属性..

WebProxy p = new WebProxy("localproxyIP:8080", true);
p.Credentials = new NetworkCredential("domain\\user", "password");
WebRequest.DefaultWebProxy = p;
WebClient client = new WebClient();
**client.Proxy = p;**
string downloadString = client.DownloadString("http://www.google.com");

Answer 2:

这为我工作：

IWebProxy defaultWebProxy = WebRequest.DefaultWebProxy;
defaultWebProxy.Credentials = CredentialCache.DefaultCredentials;
client = new WebClient
    {
        Proxy = defaultWebProxy
    };
string downloadString = client.DownloadString(...);

Answer 3:

试试这个代码

var transferProxy = new WebProxy("localproxyIP:8080", true);
transferProxy.Credentials = new NetworkCredential("user", "password", "domain");
var transferRequest = WebRequest.Create("http://www.google.com");
transferRequest.Proxy = transferProxy;
HttpWebResponse transferResponse = 
    (HttpWebResponse)transferRequest.GetResponse(); 
System.IO.Stream outputStream = transferResponse.GetResponseStream();

文章来源: WebProxy error: Proxy Authentication Required