我是Entity Framework的初学者。我想将员工和部门一起插入作为外键,但是在添加记录时出现以下错误:
INSERT语句与FOREIGN KEY约束\“ FK_dbo.Employees_dbo.Departments_DepartmentId \”冲突。数据库\“ EmpDB \”,表\“ dbo.Departments \”,列'Id'中发生冲突。\ r \ n该语句已终止。
部门课程:
namespace DbSet_Exmp.Models
{
public class Department
{
public int Id { get; set; }
public string DeptName { get; set; }
public virtual ICollection<Employee> Employees { get; set; }
}
}
员工班级:
namespace DbSet_Exmp.Models
{
public class Employee
{
public int Id { get; set; }
public string Name { get; set; }
public string Contact { get; set; }
public int Salary { get; set; }
public int DepartmentId { get; set; }
public virtual Department Department { get; set; }
}
}
DbContext 类:
public class EmpDbContext:DbContext
{
public EmpDbContext() : base("name=myDBConString")
{
Database.SetInitializer(new DBInitializer());
}
public DbSet<Department> Departments { get; set; }
public DbSet<Employee> employees { get; set; }
}
索引操作:
public ActionResult Index()
{
using (var context = new EmpDbContext())
{
Employee objEmp = new Employee() { Name = "Swara", Contact = "123569", Salary = 15000, DepartmentId = 2 };
context.employees.Add(objEmp);
context.SaveChanges();
}
return View();
}
答案 0 :(得分:1)
通常,在为ForeignKey
分配值时抛出此错误,但是ForeignKey
表中没有具有该值的此类数据。
在您的情况下,Department
表中没有Id = 2
和Department
的情况。因此,您可以在Departement
表中进行检查。