对实体的限制

Question

I have two three tables named
Language,Language Type,Employee

Fields of Language Type are LId,LanguageType

Fields Of Language are LId,EmpId,Language fluency

Fields of Employee are EmpId ,EmpName

Relationship between Language Type and language is one –to-one , and language and Employee table is many -to –one . Problem is when I enter data in language it displays the error

A dependent property in a Referential Constraint is mapped 
to a store-generated column. Column: 'LId'."}.

Even though data is being inserted in language Type but not in language table . lINQ query is for language table is

public void AddEmpLanguage(Language language, long id)   
{ 
   using (var context = new HRMSEntities())
  {
       Language emp = new Language
       {
            EmpId = id,
            LanguageFluency = language.LanguageFluency,
        };
       context.Language.AddObject(emp);
   }
}

Answer 1

You can try to add the language directly to a employee object

public void AddEmpLanguage(Language language, long empId)   
{ 
    using (var context = new HRMSEntities())
    {
        Language lang = new Language
        {
            LanguageFluency = language.LanguageFluency,
        };
        var employee = context.Employees.Find(empId);
        /*          or context.Employees.FirstOrDefault(x=>x.ID == empId); */
        if(employee != null){
            employee.Languages.Add(lang);
        }
        context.SaveChanges();
    }
}