I have a model as below
public class Lesson
{
public int Id { get; set; }
public Section Div { get; set; }
}
public class Section
{
public int Id { get; set; }
public string Name { get; set; }
}
我也有以下的DB上下文:
public class MyContext : DbContext
{
public MyContext() : base("DefaultConnection")
{
this.Configuration.LazyLoadingEnabled = false;
this.Configuration.ProxyCreationEnabled = false;
}
public DbSet<Lesson> Lessons { get; set; }
public DbSet<Section> Sections { get; set; }
protected override void OnModelCreating(DbModelBuilder modelBuilder)
{
base.OnModelCreating(modelBuilder);
}
}
然后我使用以下代码调用数据库
using (MyContext c = new EFTest.MyContext())
{
Lesson d = new EFTest.Lesson();
Section ed = new EFTest.Section() { Name = "a" };
d.Div = ed;
c.Entry(d.Div).State = EntityState.Detached;
c.Lessons.Add(d);
c.SaveChanges();
}
我希望这段代码只保存Lesson对象,而不是保存Lesson和Section的完整图形,但实际上它保存了整个图形。如何防止它这样做?