Question

从我的存储库我总是IEnumerable<T>。

在我的ViewModel的Ctor或方法中，我想将我的实体包装成ObservableCollection<T>，如下所示：

private ObservableCollection<CustomerViewModel> customerViewModels;

public BillingViewModel(IService service)
{
   ...
   IEnumerable<Customer> customers = service.GetCustomers();

   // that will not work because of a different type
   customerViewModels = new ObservableCollection(customers); 

}

你会做什么？

Answer 1

假设您有从Customer到CustomerViewModel的某种转换：

customerViewModels = new ObservableCollection<CustomerViewModel>
    (customers.Select(c => ConvertToViewModel(c)));

Answer 2

如何将Customer转换为CustomerViewModel？也许你只需要这样的东西：

customerViewModels = new ObservableCollection<CustomerViewModel>(
    from c in customers
    select new CustomerViewModel(c)
);

使用ObservableCollection <t> </t> </t>包装IEnumerable <t>

2 个答案: