C# 从尚未'；我还没有得救

我有一个场景，需要在表中插入一条记录——myPerson实体以获取personID（int标识）。然后我需要把这个personID添加到familyAdmin.personID中

我希望在一个db.SaveChange（）中完成所有这一切

由于person实体是userAdmin实体的一部分，有没有一种方法可以在一个实体中实现这一点

目前我是如何设置的：

userAdmin familyAdmin = new userAdmin();
familyAdmin.signupDate = DateTime.Today;
familyAdmin.lastLogin = DateTime.Today;
familyAdmin.registrationID = newReg.registrationID;

person myPerson = new person();
myPerson.personName = newReg.name;
myPerson.personEmail = newReg.email;
myPerson.personPhone = newReg.phone;
myPerson.personPhoneCarrier = newReg.carrierName;
myPerson.personDOB = newReg.dob;
myPerson.familyID = familyAdmin.familyID;
myPerson.personTypeID = newReg.personTypeID;

familyAdmin.personID = myPerson.personID;
familyAdmin.people.Add(myPerson);

db.userAdmins.Add(familyAdmin);
db.SaveChanges();

此选项当前不起作用。执行此选项时不会生成任何错误。我得到的是0，而不是1，2，3等等

插入到person表中的操作正在进行，并且正在正确生成ID。正是当我试图检索该ID以在获取0的同时将其插入UserAdmin表时

我必须这样做吗：

person myPerson = new person();
myPerson.personName = newReg.name;
myPerson.personEmail = newReg.email;
myPerson.personPhone = newReg.phone;
myPerson.personPhoneCarrier = newReg.carrierName;
myPerson.personDOB = newReg.dob;
myPerson.familyID = familyAdmin.familyID;
myPerson.personTypeID = newReg.personTypeID;

db.person.Add(myPerson);
db.SaveChanges();


userAdmin familyAdmin = new userAdmin();
familyAdmin.signupDate = DateTime.Today;
familyAdmin.lastLogin = DateTime.Today;
familyAdmin.registrationID = newReg.registrationID;
familyAdmin.personID = myPerson.personID;

db.userAdmins.Add(familyAdmin);
db.SaveChanges();

userAdmin familyAdmin = new userAdmin();
familyAdmin.signupDate = DateTime.Today;
familyAdmin.lastLogin = DateTime.Today;
familyAdmin.registrationID = newReg.registrationID;

person myPerson = new person();
myPerson.personName = newReg.name;
myPerson.personEmail = newReg.email;
myPerson.personPhone = newReg.phone;
myPerson.personPhoneCarrier = newReg.carrierName;
myPerson.personDOB = newReg.dob;
// myPerson.familyID = familyAdmin.familyID; Not necessary
myPerson.personTypeID = newReg.personTypeID;

// familyAdmin.personID = myPerson.personID; Not necessary
familyAdmin.people.Add(myPerson);

db.userAdmins.Add(familyAdmin);
db.SaveChanges();

部分EDMX图像：

userAdmin familyAdmin = new userAdmin();
familyAdmin.signupDate = DateTime.Today;
familyAdmin.lastLogin = DateTime.Today;
familyAdmin.registrationID = newReg.registrationID;

person myPerson = new person();
myPerson.personName = newReg.name;
myPerson.personEmail = newReg.email;
myPerson.personPhone = newReg.phone;
myPerson.personPhoneCarrier = newReg.carrierName;
myPerson.personDOB = newReg.dob;
myPerson.familyID = familyAdmin.familyID;
myPerson.personTypeID = newReg.personTypeID;

familyAdmin.personID = myPerson.personID;
familyAdmin.people.Add(myPerson);

db.userAdmins.Add(familyAdmin);
db.SaveChanges();

---

由于以下两行原因，第一个选项不起作用：

myPerson.familyID = familyAdmin.familyID;

familyAdmin.personID = myPerson.personID;

这些行不是必需的，因为您正在检查未在数据库中创建的标识符

您的代码应该如下所示：

person myPerson = new person();
myPerson.personName = newReg.name;
myPerson.personEmail = newReg.email;
myPerson.personPhone = newReg.phone;
myPerson.personPhoneCarrier = newReg.carrierName;
myPerson.personDOB = newReg.dob;
myPerson.familyID = familyAdmin.familyID;
myPerson.personTypeID = newReg.personTypeID;

db.person.Add(myPerson);
db.SaveChanges();


userAdmin familyAdmin = new userAdmin();
familyAdmin.signupDate = DateTime.Today;
familyAdmin.lastLogin = DateTime.Today;
familyAdmin.registrationID = newReg.registrationID;
familyAdmin.personID = myPerson.personID;

db.userAdmins.Add(familyAdmin);
db.SaveChanges();

userAdmin familyAdmin = new userAdmin();
familyAdmin.signupDate = DateTime.Today;
familyAdmin.lastLogin = DateTime.Today;
familyAdmin.registrationID = newReg.registrationID;

person myPerson = new person();
myPerson.personName = newReg.name;
myPerson.personEmail = newReg.email;
myPerson.personPhone = newReg.phone;
myPerson.personPhoneCarrier = newReg.carrierName;
myPerson.personDOB = newReg.dob;
// myPerson.familyID = familyAdmin.familyID; Not necessary
myPerson.personTypeID = newReg.personTypeID;

// familyAdmin.personID = myPerson.personID; Not necessary
familyAdmin.people.Add(myPerson);

db.userAdmins.Add(familyAdmin);
db.SaveChanges();

---

如果您使用

familyAdmin.people.Add（myPerson）正确配置了
userAdmin
实体上的
people
属性和
person
实体之间的关系

和

调用db.SaveChanges（）

然后EF将在内部调用

DetectChanges

，以便修复这两个实体之间的关系，并以正确的顺序生成正确的SQL，因为它知道哪个实体需要先插入，哪个实体需要外键id。

并且选项一对您不起作用吗？是的，这是正确的。-我更新了我的问题以反映这一点。当它不起作用时，它说了什么？错误消息？如果导航属性设置正确，您应该能够通过将myPerson分配到

familyAdmin.Person=myPerson，在一次调用中完成所有操作

或类似的东西。@CodeNotFound-我更新了我的问题。没有错误，我只得到一个0而不是1,2,3（因为它是表的标识）。但是，插入到person表中的操作正在进行，并且正确生成了ID。就在我试图检索该ID以同时插入UserAdmin表时，我将尝试一下。谢谢-我能够将familyID放入person实体中，但personID在userAdmin实体中仍然为0。有什么想法吗？