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嗨,我是使用4个表不以某些空表工作..LINQ multible加入
有时不具备此表中(教育或地址或证书) 信息,所以结果来了空.. 如果有信息我怎么说? 例如
**PersonTable**
PersonId PersonName
1453 george
**Certificate Table**
CertificateId PersonId CertificateName (0 records)
**Addres Table**
AddresId PersonId Adress
1 1453 ......
2 1453 .....
3 1453 ......
4 1453 ......
5 1453 ........
**EducationTable**
EducationId PersonId Education
1 1453 school name
**BankTable**
BankId PersonId Bank (0 records)
Person table = 1 records
Certificates = 0 records
Address = 5 records
Education = 1 records
Bank = 0 records
var query = (from p in DbEntities.t_Person
join q in DbEntities.t_Address on p.PersonId equals q.addressId
join n in DbEntities.t_Education on p.PersonId equals n.EduId
join j in DbEntities.t_Certificate on p.PersonId equals j.CertificateId
join f in DbEntities.t_BankAccount on p.PersonId equals f.BankId
where p.PersonId.Equals(id)
select new { p, q, n, j, f }).FirstOrDefault();
返回查询值零,
我不明白为什么这些价值?
Person table = 1 records
Address = 5 records
Education = 1 records
我想过这个问题,但没有
var query = (from p in DbEntities.t_Person
where p.PersonId.equlas(id)
select p).singleOrDefault();
query = from p in dbEntities.Address
WHERE P.AddressId.equlas(query.PersonId)
select p;
谢谢你jeff ... – user3816319
没问题!如果这是您寻求的解决方案,请标记为答案。 –