1.4.3 LINQ to SQL 对数据库应用查询表达式

/****** Object:  Table [dbo].[Product]    Script Date: 04/24/2012 23:58:49 ******/
IF  EXISTS (SELECT * FROM sys.objects WHERE object_id = OBJECT_ID(N'[dbo].[Product]') AND type in (N'U'))
DROP TABLE [dbo].[Product]
GO

USE [C:\USERS\JON\DOCUMENTS\COMPUTING\AUTHORING\CSHARP 2 AND 3\BOOK\CODE\DATABASES\LINQDEMO.MDF]
GO

/****** Object:  Table [dbo].[Product]    Script Date: 04/24/2012 23:58:49 ******/
SET ANSI_NULLS ON
GO

SET QUOTED_IDENTIFIER ON
GO

CREATE TABLE [dbo].[Product](
[ProductID] [int] IDENTITY(1,1) NOT NULL,
[Name] [nvarchar](50) NOT NULL,
[Price] [decimal](18, 2) NOT NULL,
[SupplierID] [int] NOT NULL
) ON [PRIMARY]

GO

/****** Object:  Table [dbo].[Supplier]    Script Date: 04/24/2012 23:58:55 ******/
IF  EXISTS (SELECT * FROM sys.objects WHERE object_id = OBJECT_ID(N'[dbo].[Supplier]') AND type in (N'U'))
DROP TABLE [dbo].[Supplier]
GO

USE [C:\USERS\JON\DOCUMENTS\COMPUTING\AUTHORING\CSHARP 2 AND 3\BOOK\CODE\DATABASES\LINQDEMO.MDF]
GO

/****** Object:  Table [dbo].[Supplier]    Script Date: 04/24/2012 23:58:55 ******/
SET ANSI_NULLS ON
GO

SET QUOTED_IDENTIFIER ON
GO

CREATE TABLE [dbo].[Supplier](
[SupplierID] [int] IDENTITY(1,1) NOT NULL,
[Name] [nvarchar](50) NOT NULL
) ON [PRIMARY]

GO

using (LinqDemoDataContext db = new LinqDemoDataContext())
{
var filtered = from p in db.Product
join s in db.Supplier
on p.SupplierID equals s.SupplierID
where p.Price > 10
orderby s.Name, p.Name
select new
{
SupplierName = s.Name,
ProductName = p.Name
};
foreach (var v in filtered)
{
Console.WriteLine("Supplier={0}；Product={1}", v.SupplierName, v.ProductName);
}
}