asp.net-mvc-4 - MVC 4 EF5 Primary Key

Question

In my application my user model has a foreign key to the address table. My problem is after I insert the the address into the address table I have to run a LINQ query on the whole population of the address table looking for the record I just persisted. Is there a better way to get the primary key from a record that was just persisted?

Answer 1

我建议你将主键类型更改为 GUID，在 SQL 中为 UNIQUEIDENTIFIER。那么你就会知道你插入的id：

var id = Guid.NewGuid();
var model = new Address()
{
    Id = id,
    // ...
};
// add and save context

Answer 2

之后SaveChanges()，上下文将使用新创建的 id 更新您的实体。