Question

I’m trying to create an ImagesController in MVC4 like this

But I keep getting this error.

Had no problem creating controller for PeopleController using this class

public class Person
{
    public int Id { get; set; }

    public string FirstName { get; set; }

    public string LastName { get; set; }

    public virtual IEnumerable<Affair> Affairs { get; set; }
}

Answer 1

The problem is with your File property on the Image class. Because EntityFramework won’t understand the type HttpPostedFileBase and can’t store it in the DB and the controller generator is smart enough to check this. Altough the error message doesn’t tell you what is the problem. To fix this you should rewrite your property to use a byte array:

public class Image
{
    ...
    public byte[] File { get; set; }
}

And then the controller generation should work. And you can add your own image upload action, something like this:

[HttpPost]
public ActionResult Upload(Image image, HttpPostedFileBase file)
{
    if (ModelState.IsValid)
    {
        db.Entry(image).State = EntityState.Modified;
        image.File = new byte[file.ContentLength];
        file.InputStream.Read(image.File, 0, file.ContentLength); 
        db.SaveChanges();
        return RedirectToAction("Index");
    }
    return View(image);
}