实体框架插入多个外键

Question

Patient.DivHospitalID (FK) 
DivHospital.HospitalID (FK) 
Hospital.HospitalID (PK) 

我需要插入DivHospital医院并链接/插入患者DivHospital。

Patient tp = new Patient(); 
DivHospital dh = new DivHospital(); 

dh.HospitalReference.EntityKey = 
    new EntityKey("transportPagerEntities.Hospital", "hospitalID", hospital); 
     tp.DivHospitalReference.EntityKey = new 
     EntityKey("transportPagerEntities.DivHospital", "divHospitalID", hospitalref); 

context.AddToDivHospital(dh); 
context.AddToTransportPatient(tp); 
context.SaveChanges(); 

Answer 1

假设你没有处理PK（整数），并且因为你使用的是ORM，你不应该这样做。

你不需要做EntityKey的东西，直接设置它们。

Patient tp = new Patient(); 
DivHospital dh = new DivHospital(); 

dh.Hospital = hospital; 
tp.DivHospital = hospitalref; 

context.AddToDivHospital(dh); 
context.AddToTransportPatient(tp); 

context.SaveChanges(); 

Answer 2

有了这个的EntityFramework是很容易的（如果我理解您的问题）：

Patient tp = new Patient(); 
DivHospital dh = new DivHospital(); 

dh.Patient.Add(tp); //magic 

context.AddToDivHospital(dh); 
context.SaveChanges();