set default proxy programmatically instead of using app.config

问题

Being behind a proxy, my .Net 4.0 C# application only works when there is an app.config with the following content:

<system.net>
    <defaultProxy enabled="true" useDefaultCredentials="true">
        <proxy />
        <bypasslist />
        <module />
    </defaultProxy>
</system.net>

Now since I don't want to have an app.config and since embedding app.config is not recommended, what is the C# code that has the same effect as that xml chunk in the app.config and where do I place it?

回答1:

You can use WebRequest.DefaultWebProxy or GlobalProxySelection.Select

System.Net.GlobalProxySelection.Select = new WebProxy(ip,port);

OR

System.Net.WebRequest.DefaultWebProxy = new WebProxy(ip,port);

回答2:

The following code worked for me:

System.Net.WebRequest.DefaultWebProxy.Credentials 
    = System.Net.CredentialCache.DefaultNetworkCredentials;

回答3:

you can use WebProxy from System.Net

WebProxy proxyObject = new WebProxy("PROXYIP",PORTNO);
WebRequest req = WebRequest.Create("http://www.stackoverflow.com");
req.Proxy = proxyObject;

More details at MSDN

来源：https://stackoverflow.com/questions/12050415/set-default-proxy-programmatically-instead-of-using-app-config