有一些问题让我的存储库检索信息 - 保持返回null。任何想法,将不胜感激 - 新的这一点,并教我自己。C#实体框架核心和存储库
库:
public class CustomerRepository : ICustomerRepository
{
private masterContext context;
public CustomerRepository(masterContext context)
{
this.context = context;
}
public IEnumerable<Customer> GetCustomers()
{
return context.Customer.ToList();
}
public Customer GetCustomerById(int customerId)
{
var result = (from c in context.Customer where c.CustomerId == customerId select c).FirstOrDefault();
return result;
}
public void Save()
{
context.SaveChanges();
}
控制器:
public class CustomerController : Controller
{
private readonly ICustomerRepository _repository = null;
public ActionResult Index()
{
var model = (List<Customer>)_repository.GetCustomers();
return View(model);
}
public ActionResult New()
{
return View();
}
}
MasterContext,我曾EFC使:
public partial class masterContext : DbContext
{
public masterContext(DbContextOptions<masterContext> options)
: base(options)
{ }
protected override void OnModelCreating(ModelBuilder modelBuilder)
{
modelBuilder.Entity<Customer>(entity =>
{
entity.Property(e => e.CustomerName).IsRequired();
});
}
public virtual DbSet<Customer> Customer { get; set; }
public virtual DbSet<Order> Order { get; set; }
}
这可能无法解决您的问题,但为什么在返回可枚举时使用tolist?这就是资源的浪费;) –
我意识到你比使用方法时抛弃它。这是一个三重播放 –
哦,是的,你不需要创建一个CustomerRepository的实例。你使用Depenency注射吗? –