从实体集合返回可观察的集合

Question

I have the following collection and I would like to return

ObservableCollection<Person> people = new ObservableCollection<Person>();
foreach (var p in context.Persons.ToList())
{
    people.add((Person)p);
}

How can I do it without having to loop through the collection?

Answer 1

Use ObservableCollection constructor that has list as a parameter:

ObservableCollection<Person> people = new ObservableCollection<Person>(context.Persons.ToList());

From the docs :

Initializes a new instance of the ObservableCollection class that contains elements copied from the specified list.

Answer 2

用列表初始化ObservableCollection

people = new ObservableCollection<Person>(context.Persons);