我是IoC的新手,我试着开始使用StructureMap,但是在尝试获取对象实例时抛出NullReferenceException。这里是我的初始化代码:StructureMap - NullReferenceException
ObjectFactory.Initialize(x =>
{
x.ForRequestedType<IRepository<Customer>>().TheDefaultIsConcreteType<EFRepository<Customer>>();
x.ForRequestedType<ICustomerManager>().TheDefaultIsConcreteType<CustomerManager>();
});
的ICustomerManager使用构造函数注入和接收IRepository:
public class CustomerManager : ICustomerManager
{
IRepository<Customer> _repository;
public CustomerManager(IRepository<Customer> repository)
{
_repository = repository;
}
public Customer GetCustomerById(int id)
{
return _repository
.With(c => c.PhoneNumbers)
.FirstOrDefault<Customer>(c => c.Id == id);
}
public IEnumerable<Customer> GetCustomersByName(string lastName, string firstName, string middleName)
{
return _repository.Query(new CustomerMatchesName(lastName, firstName, middleName));
}
}
然后在我的业务层的代码,此行引发异常:
var manager = ObjectFactory.GetInstance<ICustomerManager>();
我真的不知道从哪里开始调试,对于一般的概念来说是如此新鲜。任何关于在这样一个简单情况下可能出错的想法?
可能重复[什么是NullReferenceException,我该如何解决它?](http://stackoverflow.com/questions/4660142/what-is-a-nullreferenceexception-and-how-doi-i-fix-它) – Nasreddine 2015-10-04 09:08:14