正文
EF实现主从表自动生成主键保存
小程序：扫一扫查出行【扫一扫了解最新限行尾号】
复制小程序
Class cl = new Class() { ClassName = "一年级1班" };
TestDBEntities context = new TestDBEntities();
context.Class.Add(cl);
Student st = new Student() { Class = cl, Name="wangxiaoming" };
context.Student.Add(st);
context.SaveChanges();
下面给出数据库关系图
对应sql脚本：
CREATE TABLE [dbo].[Class](
[ClassID] [int] IDENTITY(1,1) NOT NULL,
[ClassName] [nvarchar](50) NOT NULL,
CONSTRAINT [PK_Class] PRIMARY KEY CLUSTERED
(
[ClassID] ASC
)WITH (PAD_INDEX = OFF, STATISTICS_NORECOMPUTE = OFF, IGNORE_DUP_KEY = OFF, ALLOW_ROW_LOCKS = ON, ALLOW_PAGE_LOCKS = ON) ON [PRIMARY]
) ON [PRIMARY]
CREATE TABLE [dbo].[Student](
[StudentID] [int] IDENTITY(1,1) NOT NULL,
[Name] [nvarchar](50) NOT NULL,
[ClassID] [int] NOT NULL,
CONSTRAINT [PK_Student] PRIMARY KEY CLUSTERED
(
[StudentID] ASC
)WITH (PAD_INDEX = OFF, STATISTICS_NORECOMPUTE = OFF, IGNORE_DUP_KEY = OFF, ALLOW_ROW_LOCKS = ON, ALLOW_PAGE_LOCKS = ON) ON [PRIMARY]
) ON [PRIMARY]
设置class和student的主键和student的外键，并且主键为自增。
