How can I get the root domain URI in ASP NET

Question

Let s say I m hosting a website at http   www foobar com    Is there a way I can programmatically ascertain  http   www foobar com   in my code behind  i e  without having to hardcode it in my web config

User · Accepted Answer

HttpContext Current Request Url can get you all the info on the URL  And can break down the url into its fragments

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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

User · Answer

To get the entire request URL string   HttpContext Current Request Url   To get the www foo com portion of the request   HttpContext Current Request Url Host   Note that you are  to some degree  at the mercy of factors outside your ASP NET application  If IIS is configured to accept multiple or any host header for your application  then any of those domains which resolved to your application via DNS may show up as the Request Url  depending on which one the user entered

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--Adding the port can help when running IIS Express  Request Url Scheme           Request Url Host         Request Url Port

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If example Url is 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

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For anyone still wondering  a more complete answer is available at 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

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C  Example Below   string scheme    http      string rootUrl   default string   if  Request ServerVariables  HTTPS   ToString   ToLower       on       scheme    https        rootUrl   scheme   Request ServerVariables  SERVER NAME   ToString

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string hostUrl   Request Url Scheme           Request Url Host    should be  http   hostnamehere com

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This works also      string url   HttpContext Request Url Authority

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This will return specifically what you are asking   Dim mySiteUrl   Request Url Host ToString     I know this is an older question   But I needed the same simple answer and this returns exactly what is asked  without the http

User · Answer

I know this is older but the correct way to do this now is   string Domain   HttpContext Current Request Url Authority   That will get the DNS or ip address with port for a server

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string baseUrl   Request Url GetLeftPart UriPartial Authority     Uri  GetLeftPart Method       The GetLeftPart method returns a string containing the leftmost portion of the URI string  ending with the portion specified by part     UriPartial Enumeration       The scheme and authority segments of the URI

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Match match   Regex Match host                 1 3          1 3         string domain   match Groups 1  Success   match Groups 1  Value   null    host com    return host com s host com    return host com  host co uk    return host co uk www host co uk    return host co uk s1 www host co uk    return host co uk

User · Answer

string domainName   Request Url Host

[asp.net] How can I get the root domain URI in ASP.NET?

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