如何从httpContext(asp.net)获取“主机:”头

string requestedDomain = HttpContext.Current.Request.ServerVariables["HTTP_HOST"];
string requestScheme = HttpContext.Current.Request.Url.Scheme;
string requestQueryString = HttpContext.Current.Request.ServerVariables["QUERY_STRING"];
string requestUrl = HttpContext.Current.Request.ServerVariables["URL"];

HttpContext.Current.Request.Url.Host

我想你需要请求。标题[“主机”]

更新:根据本文,您必须小心处理其中的一些内容,因为它们将返回意外的结果:

http://blogs.msdn.com/b/asgoyal/archive/2012/09/11/one-thing-you-must-do-when-request-url-host-is-returning-an-unexpected-result.aspx