WebProxy错误:需要代理身份验证

Question

我使用以下代码从互联网获取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");

但出现以下错误:"需要代理身份验证".我无法使用默认代理,因为我的代码是在没有默认代理设置的特殊帐户下从Windows服务运行的.所以,我想在我的代码中指定所有代理设置.请告诉我如何解决此错误.

Answer 1

这对我有用:

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

Answer 2

你要设置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");