如何申请类型System.Net.WebPermission在ASP.NET MVC权限？(How

我创建，创建一个小的网络服务HttpWebRequest使用代理到另一个网站，我使用代理服务器后，我得到了错误：

请求类型“System.Net.WebPermission，系统，版本= 4.0.0.0，文化=中性公钥= b77a5c561934e089”的许可失败。

我不知道如何解决它的想法。

这里是我的代码，

HttpWebRequest req = (HttpWebRequest)WebRequest.Create("http://website.com");
req.CookieContainer = c;

req.Proxy = new WebProxy("IP:PORT");

req.UserAgent = "Mozilla/4.0 (compatible; MSIE 8.0; Windows NT 6.1; WOW64; Trident/4.0; GTB7.4; SLCC2; .NET CLR 2.0.50727; .NET CLR 3.5.30729; .NET CLR 3.0.30729; Media Center PC 6.0; .NET4.0C; .NET4.0E; InfoPath.2)";
req.Accept = "application/x-ms-application, image/jpeg, application/xaml+xml, image/gif, image/pjpeg, application/x-ms-xbap, application/vnd.ms-excel, application/vnd.ms-powerpoint, application/msword, */*";
req.Headers.Add("Accept-Language", "en-US");
req.ServicePoint.Expect100Continue = false;
req.AllowAutoRedirect = false;
req.Timeout = 10000;
req.Method = "GET";
req.KeepAlive = true;
req.ProtocolVersion = HttpVersion.Version10;

Answer 1:

It seems that you are running into a trust related issue. You might be able to work-around the issue by including in your Web.Config, under System.Web,

<trust level="Full" />

WebPermission is not available under a medium trust environment (and you can look at this article to modify this behavior and for the reasons why you shouldn't).

However, if you require full trust you might have to reconsider the requirements of your application.