I have also tried the following:

foreach (IContent homepage in umb_homepages)
{
   var lang = umbraco.library.GetCurrentDomains(homepage.Id)[0].Language;
}

However, this results in a:

System.NullReferenceException

I had a requirment to get the home page from within WebApi, and after a bit of rummaging around the only simple solution I had was to access some of the internal functionality of Umbraco using reflection. I did release a package that contains this code, called AutoRouteTemplate, but if you want the code within it looks like this.

Note: You might notice that anyrepeated requests are cached, which can make it faster than using other methods when being used outside a WebApi - Like a standard razor page, for example

namespace AutoRouteTemplate
{
    public static class Site
    {
        static Dictionary<string, IPublishedContent> cache = new Dictionary<string, IPublishedContent>();

        public static IPublishedContent GetNode(UmbracoContext context = null)
        {
            if (context == null)
                context = UmbracoContext.Current;
            string domain = context.HttpContext.Request.Url.GetLeftPart(UriPartial.Authority);

            lock (cache)
            {
                IPublishedContent node = null;
                if (cache.TryGetValue(domain, out node))
                    return node;
                try
                {
                    Uri root = new Uri(context.HttpContext.Request.Url.GetLeftPart(UriPartial.Authority));
                    Umbraco.Web.Routing.RoutingContext route = (Umbraco.Web.Routing.RoutingContext)(context.GetType().
                        GetProperty("RoutingContext", BindingFlags.NonPublic | BindingFlags.Instance | BindingFlags.DeclaredOnly).GetValue(context, null));
                    var contentRequest = (Umbraco.Web.Routing.PublishedContentRequest)typeof(Umbraco.Web.Routing.PublishedContentRequest).GetConstructor(
                          BindingFlags.NonPublic | BindingFlags.Instance,
                          null, new Type[] { typeof(System.Uri), typeof(Umbraco.Web.Routing.RoutingContext) }, null).Invoke(new object[] { root, route });

                    contentRequest.GetType().GetMethod("Prepare", BindingFlags.NonPublic | BindingFlags.Instance).Invoke(contentRequest, null);

                    if (contentRequest.InitialPublishedContent.Id == contentRequest.PublishedContent.Id)
                        node = contentRequest.PublishedContent;
                    else if (contentRequest.PublishedContent.Path.Split(',').Any(x => x == contentRequest.InitialPublishedContent.Id.ToString()))
                        node = contentRequest.InitialPublishedContent;
                    else
                        node = contentRequest.PublishedContent;
                }
                catch (Exception)
                {
                    // Swallow errors
                }
                cache.Add(domain, node);
                return node;
            }
        }
    } 

} 

Hope this helps.
 

I am creating content though and I've been using this methodology since Umbraco 7 was introduced. I select my homepage as a reference point then traverse the tree to find where to create the content from our web services.

Okay, but you only need to use the ContentService for querying if you need to find unpublished content. You can still use the above method for published content.

Hi Sebastiaan,

I'm afraid that method doesn't even work. In Visual Studio I get the following error:

Error 1 'Umbraco.Core.Models.IPublishedContent' does not contain a definition for 'GetCulture' and no extension method 'GetCulture' accepting a first argument of type 'Umbraco.Core.Models.IPublishedContent' could be found (are you missing a using directive or an assembly reference?)

This is a new extension method in 7.2.3 and 7.2.4 though, are you using an older version?

That might be why. For some reason the version I have is 7.2.1 despite only pulling it down from NuGet the other day. Is this something that was fixed recently?

Oh.. Update-Package UmbracoCms :-)

Sometimes you get a version from your local cache, you should try to clear it. It's usually located in C:\Users\<your_username>\AppData\Local\NuGet\Cache.

Thanks for your help with this Sebastiaan. It seems to be working. Just a quick question about the UmbracoHelper method though:

https://our.umbraco.org/forum/umbraco-7/using-umbraco-7/64377-Get-ancestor-at-level-one-using-the-UmbracoHelper-method

Well, I thought this was the solution but it turns out that it doesn't work. If I use Model.Content.GetCulture() on a page that is assigned a language of "is-IS" then it is showing up as "en-US" when it is output to the page.

is working on a reply...