虚拟属性只读-无法更改其值

Question

I'm trying to dynamically assign a value from DB to a property which inherits from EpiServer PageData class. Here is what I mean:

namespace Episerver9.Models.Pages
{
    [ContentType]
    public class StartPage : PageData
    {
        public virtual string Username { get; set; }
        public virtual string Password { get; set; }
        public virtual string FirstName { get; set; }
        public virtual string LastName { get; set; }

        [ReadOnly(false)]
        [Editable(true)]
        public virtual string testfield { get; set; }


    }
}

And in controller I'm trying the following:

namespace Episerver9.Controllers
{
    public class StartPageController : PageController<StartPage>
    {
        // GET: StartPage

        public ActionResult Index(StartPage currentPage)
        {
            currentPage.testfield = "test";
            return View(currentPage);
        }
    }
}

And this is what I'm trying to display in the view:

@Html.PropertyFor(x=>x.testfield)
// Trying to dynamically populate the data from code, later on from DB

The error that I'm getting is:

Additional information: The property testfield is read-only

This happens even tho I clearly specified for the property that IT IS NOT read only... Does anyone knows why?

Answer 1

This is because ContentData objects are always read-only for performance purposes. To change any properties, you have to create a writable clone like:

currentPage.CreateWritableClone()

That will give you an instance of your page that you can change, for example to save changes using an IContentRepository instance.

However, note that these instances are read-only for a reason. :) You're better off creating a separate view model that you pass to your view.