How can I get my webapp s base URL in ASP NET MVC

Question

How can I quickly determine what the root URL is for my ASP NET MVC application   I e   if IIS is set to serve my application at http   example com foo bar  then I d like to be able to get that URL in a reliable way that doesn t involve getting the current URL from the request and chopping it up in some fragile way that breaks if I re-route my action   The reason that I need the base URL is that this web application calls another one that needs the root to the caller web application for callback purposes

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I put this in the head of my  Layout cshtml    lt base href        gt

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Maybe it is a better solution         var baseUrl    Request Host           using   lt a href   baseUrl  class  link  gt Base URL lt  a gt

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Assuming you have a Request object available  you can use   string Format   0     1  2    Request Url Scheme  Request Url Authority  Url Content          If it s not available  you can get to it via the context   var request   HttpContext Current Request

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For url with aplication alias like http   example com appAlias     You can try this   var req   HttpContext Current Request  string baseUrl   string Format   0     1   2    req Url Scheme  req Url Authority  req ApplicationPath

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The trick with relying upon IIS is that IIS bindings can be different from your public URLs  WCF I m looking at you   especially with multi-homed production machines  I tend to vector toward using configuration to explicitly define the  base  url for external purposes as that tends to be a bit more successful than extracting it from the Request object

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For MVC 4   String Format   0     1  2    Url Request RequestUri Scheme  Url Request RequestUri Authority  ControllerContext Configuration VirtualPathRoot

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In MVC  Layout cshtml    lt base href   Request GetBaseUrl      gt    Thats what we use   public static class ExtensionMethods   public static string GetBaseUrl this HttpRequestBase request                      if  request Url     Uri  null              return string Empty            else             return request Url Scheme           request Url Authority   VirtualPathUtility ToAbsolute

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For an absolute base URL use this  Works with both HTTP and HTTPS   new Uri Request Url  Url Content

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This is a conversion of an asp net property to MVC   It s a pretty much all singing all dancing get root url method   Declare a helper class   namespace MyTestProject Helpers       using System Web       public static class PathHelper               public static string FullyQualifiedApplicationPath HttpRequestBase httpRequestBase                        string appPath   string Empty               if  httpRequestBase    null                                  Formatting the fully qualified website url name                 appPath   string Format   0     1  2  3                                httpRequestBase Url Scheme                              httpRequestBase Url Host                              httpRequestBase Url Port    80   string Empty         httpRequestBase Url Port                              httpRequestBase ApplicationPath                              if   appPath EndsWith                                     appPath                                    return appPath                      Usage   To use from a controller   PathHelper FullyQualifiedApplicationPath ControllerContext RequestContext HttpContext Request    To use in a view    using MyTestProject Helpers  PathHelper FullyQualifiedApplicationPath Request

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Maybe it is extension or modification of the answers posted here but I use simply the following line and it works   Request Url GetLeftPart UriPartial Authority    Url Content        When my path is  http   host iis foldername controller action then I receive   http   host iis foldername

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You can use the following script in view    lt script type  text javascript  gt      var BASE URL     lt    ResolveUrl         gt     lt  script gt

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in simple html and ASP NET or ASP NET MVC if you are using  tag    lt a href     about  gt About us lt  a gt

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var baseurl   Request Url Scheme           Request Url Host         Request Url Port   Url Content          baseurl   --output http   localhost 49626 TEST

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In  net core 3 1 I used this approach    quot  Request Scheme     Request Host  Url Content  quot    quot    quot

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On the webpage itself    lt input type  hidden  id  basePath  value   string Format   0     1  2      HttpContext Current Request Url Scheme    HttpContext Current Request Url Authority    Url Content          gt    In the javascript   function getReportFormGeneratorPath       var formPath       reportForm   attr  action      var newPath       basePath   val     formPath    return newPath      This works for my MVC project  hope it helps

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Simply in one line get BaseUrl  string baseUrl   new Uri Request Url  Url Content       AbsoluteUri     output example  https   stackoverflow com

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Also you can use this  For the razor pages  it is better to use it than the others   https   ml-software ch posts getting-the-base-url-for-an-asp-net-core-mvc-web-application-in-your-static-javascript-files   lt  DOCTYPE html gt   lt html gt   lt head gt       lt meta charset  utf-8    gt       lt base href   Url AbsoluteContent        gt       lt title gt  ViewBag Title - ASP NET Core Web Application lt  title gt       lt  --     -- gt   lt  head gt   lt body gt

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In Code   Url Content          MVC3 Razor Syntax    Url Content

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add this function in static class in project like utility class   utility cs content   public static class Utility       public static string GetBaseUrl                 var request   HttpContext Current Request          var urlHelper   new UrlHelper request RequestContext           var baseUrl      request Url Scheme     request Url Authority  urlHelper Content                 return baseUrl            use this code any where and enjoy it   var baseUrl   Utility GetBaseUrl

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This works fine for me  also with a load balancer           var urlHelper   new UrlHelper Html ViewContext RequestContext       var baseurl   urlHelper Content               lt script gt      var base url     baseurl    lt  script gt    Especially if you are using non-standard port numbers  using Request Url Authority appears like a good lead at first  but fails in a LB environment

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This is working in ASP  NET MVC 4  In any controller action you can write  1stline gets the whole url Query String  2nd line remove local path  amp  query  last     symbol  3rd line add     symbol at last position   Uri url   System Web HttpContext Current Request Url  string UrlLink   url OriginalString Replace url PathAndQuery      UrlLink   String Concat UrlLink

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The following worked solidly for me  var request   HttpContext Request                          var appUrl   System Web HttpRuntime AppDomainAppVirtualPath                           if  appUrl                                     appUrl         appUrl                                 var newUrl   string Format   0     1  2  3   4    request Url Scheme  request UrlReferrer Host  appUrl   Controller    Action

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This was my solution  using  net core 3 1  in an api controller    string baseUrl      Request Scheme     Request Headers Where h   gt  h Key     Host   First   Value

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The following snippet works nicely for me in MVC4  and doesn t need an HttpContext available   System Web HttpRuntime AppDomainAppVirtualPath

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So none of the ones listed here worked for me  but using a few of the answers  I got something working   public string GetBaseUrl         var request   HttpContext Current Request      var appUrl   HttpRuntime AppDomainAppVirtualPath       if  appUrl                  appUrl         appUrl       var baseUrl   string Format   0     1  2    request Url Scheme  request Url Authority  appUrl        return baseUrl      Update for ASP NET Core   MVC 6   ASP NET Core makes this process a bit more painful  especially if you are deep in your code  You have 2 options to get at the HttpContext  1  Pass it in from your controller   var model   new MyClass HttpContext     then in model   private HttpContext currentContext   public MyClass HttpContext currentContext        this currentContext   currentContext      2  Perhaps the cleaner way is to inject it into your class  which starts with registering the types in your Startup   public void ConfigureServices IServiceCollection services           Add framework services      services AddMvc         services AddTransient lt MyClass  MyClass gt         services TryAddSingleton lt IHttpContextAccessor  HttpContextAccessor gt         then have it injected for you like this   private HttpContext currentContext   public MyClass IHttpContextAccessor httpContextAccessor        currentContext   httpContextAccessor HttpContext      in either case  here is the updated for  NET Core GetBaseUrl     public string GetBaseUrl         var request   currentContext Request       var host   request Host ToUriComponent         var pathBase   request PathBase ToUriComponent         return    request Scheme     host  pathBase

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For ASP NET MVC 4 it is a bit different   string url   HttpContext Request Url AbsoluteUri

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You could have a static method that looks at HttpContext Current and decides which URL to use  development or live server  depending on the host ID  HttpContext might even offer some easier way to do it  but this is the first option I found and it works fine

[.net] How can I get my webapp's base URL in ASP.NET MVC?

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