textpagecontroller.cs

public class TextPageController : RenderMvcController
{
    private readonly IExamineManager _examineManager;

    public TextPageController(IExamineManager examineManager)
    {
        _examineManager = examineManager;
    }

    public ActionResult TextPage(ContentModel model)
    {
        var vm = new TextPageViewModel(model.Content);

        if (_examineManager.TryGetIndex("ExternalIndex", out var index))
        {
            var searcher = index.GetSearcher();
            vm.Results = searcher.CreateQuery().NodeTypeAlias("textPage").Execute();
        }

        return CurrentTemplate(vm);
    }
}