c# – WCF数据服务：向数据库添加两个新对象,并在它们之间建立链接

我的数据库中有这两个表：

班级(*)< ----------(1)老师
——- ——–

一个老师有很多课,而一个班只属于一个老师.

我在我的wcf数据服务客户端中执行此操作：

var teacher = new Teacher(1,"John");

            var class1 = new Class
                {
                    teacherId=teacher1.Id,teacher=teacher1
                };

            teacher1.Classes.Add(class1);
            service.Addobject("Classes",class1);
            service.Addobject("Teachers",teacher1);
            service.AddLink(teacher1,"Classes",class1);
            service.SetLink(class1,"Teacher",teacher);

            service.SaveChanges();

执行时,我收到以下异常：

“The INSERT statement conflicted with the FOREIGN KEY constraint \”Teachers_Classes\”. The conflict occurred in database \”MyDatabase\”,table \”dbo.Teachers\”,column ‘TeacherId’.\r\nThe statement has been terminated.”

这是表Classes中定义的约束：

ALTER TABLE [dbo].[Classes]  WITH CHECK ADD  CONSTRAINT 
[Teachers_Classes] FOREIGN       KEY([Teachers_TeacherId])
REFERENCES [dbo].[Teachers] ([TeacherID])
GO

解决方法

我找到了解决方案：

我必须将SaveChangesOption传递给service.SaveChanges()方法：

service.SaveChanges(SaveChangesOptions.Batch);