// 插入新的person到现存的course
public static void InsertPerson()
{
using (EFM2MEntities context = new EFM2MEntities())
{
Person person = new Person()
{
FirstName = "Ji",
LastName = "Zhou"
};
person.Course.Add(context.Course.FirstOrDefault());
context.AddToPerson(person);
try
{
Console.WriteLine("Inserting Person {0} {1} .",
person.FirstName,
person.LastName);
context.SaveChanges();
Query();
}
catch (Exception ex)
{
Console.WriteLine(ex.Message);
}
}
}
// 插入新的person包括新的course
public static void InsertPersonWithCourse()
{
using (EFM2MEntities context = new EFM2MEntities())
{
Person person = new Person()
{
FirstName = "Yichun",
LastName = "Feng"
};
Course course = new Course()
{
CourseID = 2208,
Title = "UML"
};
person.Course.Add(course);
context.AddToPerson(person);
try
{
Console.WriteLine("Inserting Person {0} {1} with course "
+ "{2}.", person.FirstName, person.LastName,
course.Title);
context.SaveChanges();
Query();
}
catch (Exception ex)
{
Console.WriteLine(ex.Message);
}
}
}
// 更新一个现存的person
public static void UpdatePerson()
{
using (EFM2MEntities context = new EFM2MEntities())
{
Person person = new Person();
person.PersonID = 34;
context.AttachTo("Person", person);
person.FirstName = "Monica";
Course course = new Course()
{
CourseID = 2209,
Title = "Operating System"
};
person.Course.Add(course);
try
{
Console.WriteLine(
"Modifying Person 34's last to {0} and add course {1}"
+ " to it", person.LastName, course.Title);
context.SaveChanges();
Query();
}
catch (Exception ex)
{
Console.WriteLine(ex.Message);
}
}
}