Entity Framework 级联删除

为一对主从表增加级联删除功能

protected override void OnModelCreating(DbModelBuilder modelBuilder)

        {

            modelBuilder.Entity<HiddenDanger>()

                .HasMany(o => o.HidDangerAttachments)

                .WithRequired(o => o.HiddenDanger)

                .WillCascadeOnDelete();

            base.OnModelCreating(modelBuilder);

        }

//HiddenDanger主表,HidDangerAttachments子表

添加级联删除规则