如何在ASP.NET中获取根域URI?

HttpContext.Current.Request.Url 可以在URL上获取所有信息。并且可以将URL分解为其片段。

string baseUrl = Request.Url.GetLeftPart(UriPartial.Authority);

Uri::GetLeftPart Method :

getLeftPart方法返回一个字符串,该字符串包含uri字符串最左边的部分,以part指定的部分结尾。

UriPartial Enumeration :

URI的方案和权限段。

对于仍在疑惑的人,可以在以下网址找到更完整的答案: http://devio.wordpress.com/2009/10/19/get-absolut-url-of-asp-net-application/ .

public string FullyQualifiedApplicationPath
{
    get
    {
        //Return variable declaration
        var appPath = string.Empty;

        //Getting the current context of HTTP request
        var context = HttpContext.Current;

        //Checking the current context content
        if (context != null)
        {
            //Formatting the fully qualified website url/name
            appPath = string.Format("{0}://{1}{2}{3}",
                                    context.Request.Url.Scheme,
                                    context.Request.Url.Host,
                                    context.Request.Url.Port == 80
                                        ? string.Empty
                                        : ":" + context.Request.Url.Port,
                                    context.Request.ApplicationPath);
        }

        if (!appPath.EndsWith("/"))
            appPath += "/";

        return appPath;
    }
}

如果示例URL是 http://www.foobar.com/Page1

HttpContext.Current.Request.Url; //returns "http://www.foobar.com/Page1"


HttpContext.Current.Request.Url.Host; //returns "www.foobar.com"


HttpContext.Current.Request.Url.Scheme; //returns "http/https"


HttpContext.Current.Request.Url.GetLeftPart(UriPartial.Authority); //returns "http://www.foobar.com"

string hostUrl = Request.Url.Scheme + "://" + Request.Url.Host; //should be "http://hostnamehere.com"

要获取整个请求URL字符串:

HttpContext.Current.Request.Url

要获取请求的www.foo.com部分:

HttpContext.Current.Request.Url.Host

请注意,在某种程度上,您受ASP.NET应用程序外部因素的影响。如果将IIS配置为接受应用程序的多个或任何主机头,则通过DNS解析到应用程序的任何域都可能显示为请求URL,具体取决于用户输入的域。

--添加端口有助于运行IIS Express

Request.Url.Scheme + "://" + Request.Url.Host + ":" + Request.Url.Port

string domainName = Request.Url.Host

我知道这是老的,但现在正确的方法是

string Domain = HttpContext.Current.Request.Url.Authority

这将获取服务器的带有端口的DNS或IP地址。

Match match = Regex.Match(host, "([^.]+\\.[^.]{1,3}(\\.[^.]{1,3})?)$");
string domain = match.Groups[1].Success ? match.Groups[1].Value : null;

host.com=>返回host.com
s.host.com=>返回host.com

host.co.uk=>返回host.co.uk
www.host.co.uk=>返回host.co.uk
s1.www.host.co.uk=>返回host.co.uk

这也适用于:

字符串url=httpcontext.request.url.authority;

C示例如下:

string scheme = "http://";
string rootUrl = default(string);
if (Request.ServerVariables["HTTPS"].ToString().ToLower() == "on")
{
  scheme = "https://";
}
rootUrl = scheme + Request.ServerVariables["SERVER_NAME"].ToString();

string host = Request.Url.Host;
Regex domainReg = new Regex("([^.]+\\.[^.]+)$");
HttpCookie cookie = new HttpCookie(cookieName, "true");
if (domainReg.IsMatch(host))
{
  cookieDomain = domainReg.Match(host).Groups[1].Value;                                
}

这将具体返回您要求的内容。

Dim mySiteUrl = Request.Url.Host.ToString()

我知道这是个老问题。但我需要同样简单的答案,这将返回被询问的内容(不带http://)。