// 插入和查询PersonWithPersonDetail
public static void InsertQueryPersonWithPersonDetail()
{
// 创建新的Person实体
Person person = new Person();
person.FirstName = "Lopez";
person.LastName = "Typot";
// 创建新的PersonDetail实体
PersonDetail personDetail = new PersonDetail();
personDetail.PersonCategory = 0;
personDetail.HireDate = System.DateTime.Now;
// 将person中的PersonDetail属性设置成此PersonDetail
person.PersonDetail = personDetail;
// 插入PersonWithPersonDetail
using (EFTblSplitEntities context = new EFTblSplitEntities())
{
context.AddToPerson(person);
Console.WriteLine("Saving person {0} {1}", person.FirstName,
person.LastName);
// 请注意personDetail.PersonID和person.PersonID是相同的，这就
// 是我们为什么喜欢Entity Framework的原因.
Console.WriteLine("Saving person detail with the same " +
"personID.\n");
context.SaveChanges();
}
// 查询 PersonWithPersonDetail
using (EFTblSplitEntities context = new EFTblSplitEntities())
{
// 获取刚插入的person
Person person2 = (from p in context.Person
where p.PersonID == person.PersonID
select p).FirstOrDefault();
Console.WriteLine(
"Retrieved person {0} with person detail",
person2.PersonID,
person2.PersonDetail);
person2.PersonDetailReference.Load();
Console.WriteLine(
"Retrieved hiredate for person detail {0}",
person2.PersonDetail.HireDate);
}
}