c# - Entity Framework 中的多重连接

Question

我在 TSQL 中有以下查询

select * from users 
inner join linkUserPhoneNumber on users.UserId = linkUserPhoneNumber.UserId
INNER JOIN PhoneNumber ON PhoneNumber.PhoneNumberId =
    linkUserPhoneNumber.PhoneNumberId
    where UserName = 'superuser' and password ='password'

我在 Entity Framework 中有以下查询

var query = (from u in myEntities.Users
  join link in myEntities.linkUserPhoneNumbers on u.UserId equals link.UserId 
  join p in myEntities.PhoneNumbers on p.PhoneNumberId equals link.PhoneNumberId
  where u.UserName == Username && u.Password == Password
  select u).ToList();

当我尝试编译它时，我得到了

Error 3 The name 'p' is not in scope on the left side of 'equals'. Consider swapping the expressions on either side of 'equals'.
Error 4 The name 'link' is not in scope on the right side of 'equals'. Consider swapping the expressions on either side of 'equals'.

Answer 1

错误到底是什么意思

p.PhoneNumberId equals link.PhoneNumberId 

应该是

link.PhoneNumberId equals p.PhoneNumberId

完整代码

var query = (from u in myEntities.Users
  join link in myEntities.linkUserPhoneNumbers on u.UserId equals link.UserId 
  join p in myEntities.PhoneNumbers on link.PhoneNumberId equals p.PhoneNumberId
  where u.UserName == Username && u.Password == Password
  select u).ToList();