C# WebProxy 错误：需要代理身份验证
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WebProxy error: Proxy Authentication Required
提问by Oleg Ignatov
I use the following code to obtaing html data from the internet:
我使用以下代码从互联网上获取 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");
But the following error is appeared: "Proxy Authentication Required". I can't use default proxy because of my code runs from windows service under the special account which there is no default proxy settings for. So, I want to specidy all proxy settings in my code. Please advice me how to resolve this error.
但是出现以下错误：“需要代理身份验证”。我无法使用默认代理，因为我的代码在没有默认代理设置的特殊帐户下从 Windows 服务运行。所以，我想在我的代码中指定所有代理设置。请建议我如何解决此错误。
采纳答案by 2GDev
You've to set the WebClient.Proxy Property..
您必须设置 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");
回答by Marco
Try this code
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();
回答by Johan Larsson
This worked for me:
这对我有用：
IWebProxy defaultWebProxy = WebRequest.DefaultWebProxy;
defaultWebProxy.Credentials = CredentialCache.DefaultCredentials;
client = new WebClient
{
Proxy = defaultWebProxy
};
string downloadString = client.DownloadString(...);
