下面的(c#)代码应该可以做到这一点

Uri uri = new Uri("http://www.mywebsite.com:80/pages/page1.aspx");
string requested = uri.Scheme + Uri.SchemeDelimiter + uri.Host + ":" + uri.Port;

如果你在Asp中做这个。Net或访问HttpContext.Current.Request 我想说，这些是更简单、更普遍的获得它们的方法:

var scheme = Request.Url.Scheme; // will get http, https, etc.
var host = Request.Url.Host; // will get www.mywebsite.com
var port = Request.Url.Port; // will get the port
var path = Request.Url.AbsolutePath; // should get the /pages/page1.aspx part, can't remember if it only get pages/page1.aspx

我希望这能有所帮助。：）

一种更结构化的方法是使用UriBuilder。这避免了直接的字符串操作。

var builder = new UriBuilder(Request.Url.Scheme, Request.Url.Host, Request.Url.Port);

更短的方法，可能需要更新的ASP。Net:

string authority = Request.Url.GetComponents(UriComponents.SchemeAndServer,UriFormat.Unescaped)

UriComponents enum允许您指定希望包含URI的哪个组件。

下面的(c#)代码应该可以做到这一点

Uri uri = new Uri("http://www.mywebsite.com:80/pages/page1.aspx");
string requested = uri.Scheme + Uri.SchemeDelimiter + uri.Host + ":" + uri.Port;

对我来说

Uri uri = new Uri("http://www.mywebsite.com:80/pages/page1.aspx");
string requested = uri.Scheme + Uri.SchemeDelimiter + uri.Authority;

工作来获得

https://www.mywebsite.com:80