Does a view exist in ASP.NET MVC?

Question

Is it possible to determine if a specific view name exists from within a controller before rendering the view?

I have a requirement to dynamically determine the name

Answer 1

In asp.net core 2.x the ViewEngines property no longer exists so we have to use the ICompositeViewEngine service. This a variant of the accepted answer using dependency injection:

public class DemoController : Controller
{
    private readonly IViewEngine _viewEngine;

    public DemoController(ICompositeViewEngine viewEngine)
    {
        _viewEngine = viewEngine;
    }

    private bool ViewExists(string name)
    {
        ViewEngineResult viewEngineResult = _viewEngine.FindView(ControllerContext, name, true);
        return viewEngineResult?.View != null;
    }

    public ActionResult Index() ...
}

For the curious: The base interface IViewEngine is not registered as a service so we must inject ICompositeViewEngine instead. The FindView() method however is provided by IViewEngine so the member variable may use the base interface.