entity-framework-model-mapping-4

UserService.cs

using System.Collections.Generic;
using EntityFrameworkExamples.Data;
using EntityFrameworkExamples.Models;

namespace EntityFrameworkExamples.Services
{
    public class UserService
    {
        private readonly ApplicationContext _context;

        public UserService(ApplicationContext context)
        {
            _context = context;
        }

        public IEnumerable GetUsers()
        {
            return _context.Users;
        }

        public User GetUser(long id)
        {
            return _context.Users.Find(id);
        }

        public User AddUser(User user)
        {
            var result = _context.Users.Add(user);

            _context.SaveChanges();

            return result;
        }

        public int UpdateUser(long id, User user)
        {
            var original = GetUser(id);

            if (original == null)
                return 0;

            var entry = _context.Entry(original);

            entry.CurrentValues.SetValues(user);

            return _context.SaveChanges();
        }

        public int RemoveUser(long id)
        {
            var user = GetUser(id);

            if (user == null)
                return 0;

            _context.Users.Remove(user);

            return _context.SaveChanges();
        }
    }
}

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