// 插入新的department包括新的course
public static void InsertDepartmentWithCourse()
{
using (EFO2MEntities context = new EFO2MEntities())
{
Department department = new Department()
{
DepartmentID = 4,
Name = "Software Engineering"
};
Course course = new Course()
{
CourseID = 2202,
Title = "ADO.NET"
};
department.Course.Add(course);
context.AddToDepartment(department);
try
{
Console.WriteLine("Inserting department {0} with course "
+ "{1}", department.Name, course.Title);
context.SaveChanges();
Query();
}
catch (Exception ex)
{
Console.WriteLine(ex.Message);
}
}
}
// 更新一个现存的department
public static void UpdateDepartment()
{
using (EFO2MEntities context = new EFO2MEntities())
{
Department department = new Department();
department.DepartmentID = 1;
context.AttachTo("Department", department);
department.Name = "Computer Engineering";
department.Course.Add(new Course()
{
CourseID = 2204,
Title = "Arithmetic"
});
try
{
Console.WriteLine("Modifying Department 1's Title to {0}"
+ ", and insert a new Course 2204 into the " +
"Department 1", department.Name);
context.SaveChanges();
Query();
}
catch (Exception ex)
{
Console.WriteLine(ex.Message);
}
}
}