How to model bind the current member in Umbraco 8

For this example I created a document type Profile Page, and a controller to go with it. I used the Models Builder mode LiveAppData. I included the generated files App_Data/Models/ProfilePage.generated.cs, and App_Data/Models/Member.generated.cs¹ in my VS project. I also added a Member typed parameter to the default controller action Index:

namespace Logikfabrik.Umbraco.Controllers
{
  using System.Web.Mvc;
  using global::Umbraco.Web.Models;
  using global::Umbraco.Web.Mvc;
  using global::Umbraco.Web.PublishedModels;

  public class ProfilePageController : RenderMvcController
  {
    public ActionResult Index(ContentModel<ProfilePage> model, Member member)
    {
      return CurrentTemplate(model);
    }
  }
}

Requests for ProfilePage content are now routed to this action.

The Member model implements IPublishedContent. The default model binder ContentModelBinder binds ContentModel, ContentModel<>, and, IPublishedContent parameters. So ContentModelBinder tries, and fails, to bind ProfilePage content to both the model, and member parameters:

[ModelBindingException: Cannot bind source content type Umbraco.Web.PublishedModels.ProfilePage to model type Umbraco.Web.PublishedModels.Member.]

Add the following to your VS project:

namespace Logikfabrik.Umbraco
{
  using System.Web.Mvc;
  using global::Umbraco.Web.Mvc;
  using global::Umbraco.Web.PublishedModels;

  public class MemberModelBinder : IModelBinder
  {
    public object BindModel(ControllerContext controllerContext, ModelBindingContext bindingContext)
    {
      var umbraco = (controllerContext?.Controller as RenderMvcController)?.Umbraco ??
                    (controllerContext?.Controller as SurfaceController)?.Umbraco;

      if (umbraco == null)
      {
        return null;
      }

      var member = umbraco.MembershipHelper.GetCurrentMember();

      return member == null ? null : new Member(member);
    }
  }
}

namespace Logikfabrik.Umbraco
{
  using System;
  using System.Web.Mvc;
  using global::Umbraco.Web.PublishedModels;

  public class MemberModelBinderProvider : IModelBinderProvider
  {
    public IModelBinder GetBinder(Type modelType)
    {
      return modelType == typeof(Member) ? new MemberModelBinder() : null;
    }
  }
}

namespace Logikfabrik.Umbraco
{
  using System.Web.Mvc;
  using global::Umbraco.Core.Composing;

  public class Component : IComponent
  {
    public void Initialize()
    {
      ModelBinderProviders.BinderProviders.Insert(0, new MemberModelBinderProvider());
    }

    public void Terminate()
    {
    }
  }
}

namespace Logikfabrik.Umbraco
{
  using global::Umbraco.Core.Composing;

  public class Composer : ComponentComposer<Component>, IUserComposer
  {
  }
}

Composer and Component adds MemberModelBinderProvider to the list of providers on start-up. MemberModelBinder will bind the current member to Member typed action parameters. In this case the member parameter.

And that’s it.