vb.net DBEntities框架联表查询 Join

在项目中配置好DBEntities

使用两个表：主表Table, 子表Table_Item

主要是用到了委托和泛型，ForEach用的是不带返回值的委托

Sub GetDb()

        Dim st As New Stopwatch
        st.Start()
        Using db As New ApiDBEntities

            Dim d = db.Table.Join(db.Table_Item,
                              Function(u) u.id,
                              Function(g) g.MainId,
                              Function(u, g) New With {
                              .姓名 = u.name，
                              .编号 = u.id}
                              )

            'Dim e = d.Where(Function(t) t.n <> 1)

            Dim f = d.ToList
            f.ForEach(Sub(c) Console.WriteLine("打印数据{0}", c.姓名))

            Console.WriteLine(d.ToString())

        End Using

        st.Stop()
        Console.WriteLine("消耗时间={0}", st.ElapsedMilliseconds)
    End Sub