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ASP.NET MVC Error: must declare a body because it is not marked abstract

Posted on 2010-09-24
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Last Modified: 2012-05-10
Hi All,

I'm going through a book to help me learn ASP.NET MVC. I've got to a point where I seem to be getting errors, but I can't figure out why.

I have two classes, an IProductRepository and ProductRespository.

IProductRepository is this...

namespace ToyStore.Models
{
    public class IProductRepository
    {
        public IEnumerable<Product> List();  **ERROR ON THIS LINE**
        Product Get(int id);  **ERROR ON THIS LINE**
        void Create(Product productToCreate);  **ERROR ON THIS LINE**
        void Edit(Product productToEdit);  **ERROR ON THIS LINE**
        void Delete(Product productToDelete);  **ERROR ON THIS LINE**
    }
}

and ProductRepository...

namespace ToyStore.Models
{
    public class ProductRepository : IProductRepository
    {
        private ProductsDBEntities _entities = new ProductsDBEntities();

        #region IProductRepository Members
        public IEnumerable<Product> List()
        {
            return _entities.ProductSet.ToList();
        }

        public Product Get(int Id)
        {
            return (from p in _entities.ProductSet where p.Id == Id select p).FirstOrDefault();
        }

        public void Create(Product productToCreate)
        {
            _entities.AddToProductSet(productToCreate);
            _entities.SaveChanges();
        }

        public void Edit(Product productToEdit)
        {
            var originalProduct = Get(productToEdit.Id);
            _entities.ApplyPropertyChanges(originalProduct.EntityKey.EntitySetName,productToEdit);
            _entities.SaveChanges();
        }

        public void Delete(Product productToDelete)
        {
            var originalProduct = Get(productToDelete.Id);
            _entities.DeleteObject(originalProduct);
            _entities.SaveChanges();
        }

        #endregion
    }
}


Does anyone have any ideas? I had a look around google, and a few results said to make sure that the project framework is 3.5, I've checked this, and it is.
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Question by:SheppardDigital
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3 Comments
 
LVL 14

Accepted Solution

by:
existenz2 earned 2000 total points
ID: 33753747
It's quite easy. You have defined a class where it should be an interface;

namespace ToyStore.Models
{
    public class IProductRepository
    {
        public IEnumerable<Product> List();  **ERROR ON THIS LINE**
        Product Get(int id);  **ERROR ON THIS LINE**
        void Create(Product productToCreate);  **ERROR ON THIS LINE**
        void Edit(Product productToEdit);  **ERROR ON THIS LINE**
        void Delete(Product productToDelete);  **ERROR ON THIS LINE**
    }
}


should be:

namespace ToyStore.Models
{
    public interface IProductRepository
    {
        public IEnumerable<Product> List();  **ERROR ON THIS LINE**
        Product Get(int id);  **ERROR ON THIS LINE**
        void Create(Product productToCreate);  **ERROR ON THIS LINE**
        void Edit(Product productToEdit);  **ERROR ON THIS LINE**
        void Delete(Product productToDelete);  **ERROR ON THIS LINE**
    }
}

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0
 
LVL 14

Expert Comment

by:existenz2
ID: 33753749
Without the **ERROR ON THIS LINE**   ofcourse :)
0
 

Author Closing Comment

by:SheppardDigital
ID: 33753782
Sometimes it takes someone else to take a look and pinpoint your errors :)

Thanks
0

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