使用Entity Framework和WCF Ria Services開發SilverLight之1：簡單模型
本文目的是通過Silverlight ria service完成一次數據的讀取過程，并且在此基礎上建立測試項目。
Ria service借助于WCF和ADO.NET Entity Framework構建分布式開發框架。使用它可以快速構建自己的開發模式。
1：基礎結構
首先，創建SL APP，如下：
然后，選擇創建web：
可以，也可以不勾選enable wcf ria service，如果勾選了，在SL APP中會多幾個DLL的引用，其它沒有任何差別。如圖：
2：創建一個示例數據庫
這是一個小而輕型的數據庫，在MDSN的課程中有使用到它。如下：
SET ANSI_NULLS ON
GO
SET QUOTED_IDENTIFIER ON
GO
USE [master];
GO
IF EXISTS (SELECT * FROM sys.databases WHERE name = 'School')
DROP DATABASE School;
GO
-- Create the School database.
CREATE DATABASE School;
GO
-- Specify a simple recovery model
-- to keep the log growth to a minimum.
ALTER DATABASE School
SET RECOVERY SIMPLE;
GO
USE School;
GO
-- Create the Department table.
IF NOT EXISTS (SELECT * FROM sys.objects
WHERE object_id = OBJECT_ID(N'[dbo].[Department]')
AND type in (N'U'))
BEGIN
CREATE TABLE [dbo].[Department](
[DepartmentID] [int] NOT NULL,
[Name] [nvarchar](50) NOT NULL,
[Budget] [money] NOT NULL,
[StartDate] [datetime] NOT NULL,
[Administrator] [int] NULL,
CONSTRAINT [PK_Department] PRIMARY KEY CLUSTERED
(
[DepartmentID] ASC
)WITH (IGNORE_DUP_KEY = OFF) ON [PRIMARY]
) ON [PRIMARY]
END
GO
-- Create the Person table.
IF NOT EXISTS (SELECT * FROM sys.objects
WHERE object_id = OBJECT_ID(N'[dbo].[Person]')
AND type in (N'U'))
BEGIN
CREATE TABLE [dbo].[Person](
[PersonID] [int] IDENTITY(1,1) NOT NULL,
[LastName] [nvarchar](50) NOT NULL,
[FirstName] [nvarchar](50) NOT NULL,
[HireDate] [datetime] NULL,
[EnrollmentDate] [datetime] NULL,
CONSTRAINT [PK_School.Student] PRIMARY KEY CLUSTERED
(
[PersonID] ASC
)WITH (IGNORE_DUP_KEY = OFF) ON [PRIMARY]
) ON [PRIMARY]
END
GO
-- Create the OnsiteCourse table.
IF NOT EXISTS (SELECT * FROM sys.objects
WHERE object_id = OBJECT_ID(N'[dbo].[OnsiteCourse]')
AND type in (N'U'))
BEGIN
CREATE TABLE [dbo].[OnsiteCourse](
[CourseID] [int] NOT NULL,
[Location] [nvarchar](50) NOT NULL,
[Days] [nvarchar](50) NOT NULL,
[Time] [smalldatetime] NOT NULL,
CONSTRAINT [PK_OnsiteCourse] PRIMARY KEY CLUSTERED
(
[CourseID] ASC
)WITH (IGNORE_DUP_KEY = OFF) ON [PRIMARY]
) ON [PRIMARY]
END
GO
-- Create the OnlineCourse table.
IF NOT EXISTS (SELECT * FROM sys.objects
WHERE object_id = OBJECT_ID(N'[dbo].[OnlineCourse]')
AND type in (N'U'))
BEGIN
CREATE TABLE [dbo].[OnlineCourse](
[CourseID] [int] NOT NULL,
[URL] [nvarchar](100) NOT NULL,
CONSTRAINT [PK_OnlineCourse] PRIMARY KEY CLUSTERED
(
[CourseID] ASC
)WITH (IGNORE_DUP_KEY = OFF) ON [PRIMARY]
) ON [PRIMARY]
END
GO
--Create the StudentGrade table.
IF NOT EXISTS (SELECT * FROM sys.objects
WHERE object_id = OBJECT_ID(N'[dbo].[StudentGrade]')
AND type in (N'U'))
BEGIN
CREATE TABLE [dbo].[StudentGrade](
[EnrollmentID] [int] IDENTITY(1,1) NOT NULL,
[CourseID] [int] NOT NULL,
[StudentID] [int] NOT NULL,
[Grade] [decimal](3, 2) NULL,
CONSTRAINT [PK_StudentGrade] PRIMARY KEY CLUSTERED
(
[EnrollmentID] ASC
)WITH (IGNORE_DUP_KEY = OFF) ON [PRIMARY]
) ON [PRIMARY]
END
GO
-- Create the CourseInstructor table.
IF NOT EXISTS (SELECT * FROM sys.objects
WHERE object_id = OBJECT_ID(N'[dbo].[CourseInstructor]')
AND type in (N'U'))
BEGIN
CREATE TABLE [dbo].[CourseInstructor](
[CourseID] [int] NOT NULL,
[PersonID] [int] NOT NULL,
CONSTRAINT [PK_CourseInstructor] PRIMARY KEY CLUSTERED
(
[CourseID] ASC,
[PersonID] ASC
)WITH (IGNORE_DUP_KEY = OFF) ON [PRIMARY]
) ON [PRIMARY]
END
GO
-- Create the Course table.
IF NOT EXISTS (SELECT * FROM sys.objects
WHERE object_id = OBJECT_ID(N'[dbo].[Course]')
AND type in (N'U'))
BEGIN
CREATE TABLE [dbo].[Course](
[CourseID] [int] NOT NULL,
[Title] [nvarchar](100) NOT NULL,
[Credits] [int] NOT NULL,
[DepartmentID] [int] NOT NULL,
CONSTRAINT [PK_School.Course] PRIMARY KEY CLUSTERED
(
[CourseID] ASC
)WITH (IGNORE_DUP_KEY = OFF) ON [PRIMARY]
) ON [PRIMARY]
END
GO
-- Create the OfficeAssignment table.
IF NOT EXISTS (SELECT * FROM sys.objects
WHERE object_id = OBJECT_ID(N'[dbo].[OfficeAssignment]')
AND type in (N'U'))
BEGIN
CREATE TABLE [dbo].[OfficeAssignment](
[InstructorID] [int] NOT NULL,
[Location] [nvarchar](50) NOT NULL,
[Timestamp] [timestamp] NOT NULL,
CONSTRAINT [PK_OfficeAssignment] PRIMARY KEY CLUSTERED
(
[InstructorID] ASC
)WITH (IGNORE_DUP_KEY = OFF) ON [PRIMARY]
) ON [PRIMARY]
END
GO
-- Define the relationship between OnsiteCourse and Course.
IF NOT EXISTS (SELECT * FROM sys.foreign_keys
WHERE object_id = OBJECT_ID(N'[dbo].[FK_OnsiteCourse_Course]')
AND parent_object_id = OBJECT_ID(N'[dbo].[OnsiteCourse]'))
ALTER TABLE [dbo].[OnsiteCourse] WITH CHECK ADD
CONSTRAINT [FK_OnsiteCourse_Course] FOREIGN KEY([CourseID])
REFERENCES [dbo].[Course] ([CourseID])
GO
ALTER TABLE [dbo].[OnsiteCourse] CHECK
CONSTRAINT [FK_OnsiteCourse_Course]
GO
-- Define the relationship between OnlineCourse and Course.
IF NOT EXISTS (SELECT * FROM sys.foreign_keys
WHERE object_id = OBJECT_ID(N'[dbo].[FK_OnlineCourse_Course]')
AND parent_object_id = OBJECT_ID(N'[dbo].[OnlineCourse]'))
ALTER TABLE [dbo].[OnlineCourse] WITH CHECK ADD
CONSTRAINT [FK_OnlineCourse_Course] FOREIGN KEY([CourseID])
REFERENCES [dbo].[Course] ([CourseID])
GO
ALTER TABLE [dbo].[OnlineCourse] CHECK
CONSTRAINT [FK_OnlineCourse_Course]
GO
-- Define the relationship between StudentGrade and Course.
IF NOT EXISTS (SELECT * FROM sys.foreign_keys
WHERE object_id = OBJECT_ID(N'[dbo].[FK_StudentGrade_Course]')
AND parent_object_id = OBJECT_ID(N'[dbo].[StudentGrade]'))
ALTER TABLE [dbo].[StudentGrade] WITH CHECK ADD
CONSTRAINT [FK_StudentGrade_Course] FOREIGN KEY([CourseID])
REFERENCES [dbo].[Course] ([CourseID])
GO
ALTER TABLE [dbo].[StudentGrade] CHECK
CONSTRAINT [FK_StudentGrade_Course]
GO
--Define the relationship between StudentGrade and Student.
IF NOT EXISTS (SELECT * FROM sys.foreign_keys
WHERE object_id = OBJECT_ID(N'[dbo].[FK_StudentGrade_Student]')
AND parent_object_id = OBJECT_ID(N'[dbo].[StudentGrade]'))
ALTER TABLE [dbo].[StudentGrade] WITH CHECK ADD
CONSTRAINT [FK_StudentGrade_Student] FOREIGN KEY([StudentID])
REFERENCES [dbo].[Person] ([PersonID])
GO
ALTER TABLE [dbo].[StudentGrade] CHECK
CONSTRAINT [FK_StudentGrade_Student]
GO
-- Define the relationship between CourseInstructor and Course.
IF NOT EXISTS (SELECT * FROM sys.foreign_keys
WHERE object_id = OBJECT_ID(N'[dbo].[FK_CourseInstructor_Course]')
AND parent_object_id = OBJECT_ID(N'[dbo].[CourseInstructor]'))
ALTER TABLE [dbo].[CourseInstructor] WITH CHECK ADD
CONSTRAINT [FK_CourseInstructor_Course] FOREIGN KEY([CourseID])
REFERENCES [dbo].[Course] ([CourseID])
GO
ALTER TABLE [dbo].[CourseInstructor] CHECK
CONSTRAINT [FK_CourseInstructor_Course]
GO
-- Define the relationship between CourseInstructor and Person.
IF NOT EXISTS (SELECT * FROM sys.foreign_keys
WHERE object_id = OBJECT_ID(N'[dbo].[FK_CourseInstructor_Person]')
AND parent_object_id = OBJECT_ID(N'[dbo].[CourseInstructor]'))
ALTER TABLE [dbo].[CourseInstructor] WITH CHECK ADD
CONSTRAINT [FK_CourseInstructor_Person] FOREIGN KEY([PersonID])
REFERENCES [dbo].[Person] ([PersonID])
GO
ALTER TABLE [dbo].[CourseInstructor] CHECK
CONSTRAINT [FK_CourseInstructor_Person]
GO
-- Define the relationship between Course and Department.
IF NOT EXISTS (SELECT * FROM sys.foreign_keys
WHERE object_id = OBJECT_ID(N'[dbo].[FK_Course_Department]')
AND parent_object_id = OBJECT_ID(N'[dbo].[Course]'))
ALTER TABLE [dbo].[Course] WITH CHECK ADD
CONSTRAINT [FK_Course_Department] FOREIGN KEY([DepartmentID])
REFERENCES [dbo].[Department] ([DepartmentID])
GO
ALTER TABLE [dbo].[Course] CHECK CONSTRAINT [FK_Course_Department]
GO
--Define the relationship between OfficeAssignment and Person.
IF NOT EXISTS (SELECT * FROM sys.foreign_keys
WHERE object_id = OBJECT_ID(N'[dbo].[FK_OfficeAssignment_Person]')
AND parent_object_id = OBJECT_ID(N'[dbo].[OfficeAssignment]'))
ALTER TABLE [dbo].[OfficeAssignment] WITH CHECK ADD
CONSTRAINT [FK_OfficeAssignment_Person] FOREIGN KEY([InstructorID])
REFERENCES [dbo].[Person] ([PersonID])
GO
ALTER TABLE [dbo].[OfficeAssignment] CHECK
CONSTRAINT [FK_OfficeAssignment_Person]
GO
-- Create InsertOfficeAssignment stored procedure.
IF NOT EXISTS (SELECT * FROM sys.objects
WHERE object_id = OBJECT_ID(N'[dbo].[InsertOfficeAssignment]')
AND type in (N'P', N'PC'))
BEGIN
EXEC dbo.sp_executesql @statement = N'
CREATE PROCEDURE [dbo].[InsertOfficeAssignment]
@InstructorID int,
@Location nvarchar(50)
AS
INSERT INTO dbo.OfficeAssignment (InstructorID, Location)
VALUES (@InstructorID, @Location);
IF @@ROWCOUNT > 0
BEGIN
SELECT [Timestamp] FROM OfficeAssignment
WHERE InstructorID=@InstructorID;
END
'
END
GO
--Create the UpdateOfficeAssignment stored procedure.
IF NOT EXISTS (SELECT * FROM sys.objects
WHERE object_id = OBJECT_ID(N'[dbo].[UpdateOfficeAssignment]')
AND type in (N'P', N'PC'))
BEGIN
EXEC dbo.sp_executesql @statement = N'
CREATE PROCEDURE [dbo].[UpdateOfficeAssignment]
@InstructorID int,
@Location nvarchar(50),
@OrigTimestamp timestamp
AS
UPDATE OfficeAssignment SET Location=@Location
WHERE InstructorID=@InstructorID AND [Timestamp]=@OrigTimestamp;
IF @@ROWCOUNT > 0
BEGIN
SELECT [Timestamp] FROM OfficeAssignment
WHERE InstructorID=@InstructorID;
END
'
END
GO
-- Create the DeleteOfficeAssignment stored procedure.
IF NOT EXISTS (SELECT * FROM sys.objects
WHERE object_id = OBJECT_ID(N'[dbo].[DeleteOfficeAssignment]')
AND type in (N'P', N'PC'))
BEGIN
EXEC dbo.sp_executesql @statement = N'
CREATE PROCEDURE [dbo].[DeleteOfficeAssignment]
@InstructorID int
AS
DELETE FROM OfficeAssignment
WHERE InstructorID=@InstructorID;
'
END
GO
-- Create the DeletePerson stored procedure.
IF NOT EXISTS (SELECT * FROM sys.objects
WHERE object_id = OBJECT_ID(N'[dbo].[DeletePerson]')
AND type in (N'P', N'PC'))
BEGIN
EXEC dbo.sp_executesql @statement = N'
CREATE PROCEDURE [dbo].[DeletePerson]
@PersonID int
AS
DELETE FROM Person WHERE PersonID = @PersonID;
'
END
GO
-- Create the UpdatePerson stored procedure.
IF NOT EXISTS (SELECT * FROM sys.objects
WHERE object_id = OBJECT_ID(N'[dbo].[UpdatePerson]')
AND type in (N'P', N'PC'))
BEGIN
EXEC dbo.sp_executesql @statement = N'
CREATE PROCEDURE [dbo].[UpdatePerson]
@PersonID int,
@LastName nvarchar(50),
@FirstName nvarchar(50),
@HireDate datetime,
@EnrollmentDate datetime
AS
UPDATE Person SET LastName=@LastName,
FirstName=@FirstName,
HireDate=@HireDate,
EnrollmentDate=@EnrollmentDate
WHERE PersonID=@PersonID;
'
END
GO
-- Create the InsertPerson stored procedure.
IF NOT EXISTS (SELECT * FROM sys.objects
WHERE object_id = OBJECT_ID(N'[dbo].[InsertPerson]')
AND type in (N'P', N'PC'))
BEGIN
EXEC dbo.sp_executesql @statement = N'
CREATE PROCEDURE [dbo].[InsertPerson]
@LastName nvarchar(50),
@FirstName nvarchar(50),
@HireDate datetime,
@EnrollmentDate datetime
AS
INSERT INTO dbo.Person (LastName,
FirstName,
HireDate,
EnrollmentDate)
VALUES (@LastName,
@FirstName,
@HireDate,
@EnrollmentDate);
SELECT SCOPE_IDENTITY() as NewPersonID;
'
END
GO
-- Create GetStudentGrades stored procedure.
IF NOT EXISTS (SELECT * FROM sys.objects
WHERE object_id = OBJECT_ID(N'[dbo].[GetStudentGrades]')
AND type in (N'P', N'PC'))
BEGIN
EXEC dbo.sp_executesql @statement = N'
CREATE PROCEDURE [dbo].[GetStudentGrades]
@StudentID int
AS
SELECT EnrollmentID, Grade, CourseID, StudentID FROM dbo.StudentGrade
WHERE StudentID = @StudentID
'
END
GO
-- Create GetDepartmentName stored procedure.
IF NOT EXISTS (SELECT * FROM sys.objects
WHERE object_id = OBJECT_ID(N'[dbo].[GetDepartmentName]')
AND type in (N'P', N'PC'))
BEGIN
EXEC dbo.sp_executesql @statement = N'
CREATE PROCEDURE [dbo].[GetDepartmentName]
@ID int,
@Name nvarchar(50) OUTPUT
AS
SELECT @Name = Name FROM Department
WHERE DepartmentID = @ID
'
END
GO
-- Insert data into the Person table.
USE School
GO
SET IDENTITY_INSERT dbo.Person ON
GO
INSERT INTO dbo.Person (PersonID, LastName, FirstName, HireDate, EnrollmentDate)
VALUES (1, 'Abercrombie', 'Kim', '1995-03-11', null);
INSERT INTO dbo.Person (PersonID, LastName, FirstName, HireDate, EnrollmentDate)
VALUES (2, 'Barzdukas', 'Gytis', null, '2005-09-01');
INSERT INTO dbo.Person (PersonID, LastName, FirstName, HireDate, EnrollmentDate)
VALUES (3, 'Justice', 'Peggy', null, '2001-09-01');
INSERT INTO dbo.Person (PersonID, LastName, FirstName, HireDate, EnrollmentDate)
VALUES (4, 'Fakhouri', 'Fadi', '2002-08-06', null);
INSERT INTO dbo.Person (PersonID, LastName, FirstName, HireDate, EnrollmentDate)
VALUES (5, 'Harui', 'Roger', '1998-07-01', null);
INSERT INTO dbo.Person (PersonID, LastName, FirstName, HireDate, EnrollmentDate)
VALUES (6, 'Li', 'Yan', null, '2002-09-01');
INSERT INTO dbo.Person (PersonID, LastName, FirstName, HireDate, EnrollmentDate)
VALUES (7, 'Norman', 'Laura', null, '2003-09-01');
INSERT INTO dbo.Person (PersonID, LastName, FirstName, HireDate, EnrollmentDate)
VALUES (8, 'Olivotto', 'Nino', null, '2005-09-01');
INSERT INTO dbo.Person (PersonID, LastName, FirstName, HireDate, EnrollmentDate)
VALUES (9, 'Tang', 'Wayne', null, '2005-09-01');
INSERT INTO dbo.Person (PersonID, LastName, FirstName, HireDate, EnrollmentDate)
VALUES (10, 'Alonso', 'Meredith', null, '2002-09-01');
INSERT INTO dbo.Person (PersonID, LastName, FirstName, HireDate, EnrollmentDate)
VALUES (11, 'Lopez', 'Sophia', null, '2004-09-01');
INSERT INTO dbo.Person (PersonID, LastName, FirstName, HireDate, EnrollmentDate)
VALUES (12, 'Browning', 'Meredith', null, '2000-09-01');
INSERT INTO dbo.Person (PersonID, LastName, FirstName, HireDate, EnrollmentDate)
VALUES (13, 'Anand', 'Arturo', null, '2003-09-01');
INSERT INTO dbo.Person (PersonID, LastName, FirstName, HireDate, EnrollmentDate)
VALUES (14, 'Walker', 'Alexandra', null, '2000-09-01');
INSERT INTO dbo.Person (PersonID, LastName, FirstName, HireDate, EnrollmentDate)
VALUES (15, 'Powell', 'Carson', null, '2004-09-01');
INSERT INTO dbo.Person (PersonID, LastName, FirstName, HireDate, EnrollmentDate)
VALUES (16, 'Jai', 'Damien', null, '2001-09-01');
INSERT INTO dbo.Person (PersonID, LastName, FirstName, HireDate, EnrollmentDate)
VALUES (17, 'Carlson', 'Robyn', null, '2005-09-01');
INSERT INTO dbo.Person (PersonID, LastName, FirstName, HireDate, EnrollmentDate)
VALUES (18, 'Zheng', 'Roger', '2004-02-12', null);
INSERT INTO dbo.Person (PersonID, LastName, FirstName, HireDate, EnrollmentDate)
VALUES (19, 'Bryant', 'Carson', null, '2001-09-01');
INSERT INTO dbo.Person (PersonID, LastName, FirstName, HireDate, EnrollmentDate)
VALUES (20, 'Suarez', 'Robyn', null, '2004-09-01');
INSERT INTO dbo.Person (PersonID, LastName, FirstName, HireDate, EnrollmentDate)
VALUES (21, 'Holt', 'Roger', null, '2004-09-01');
INSERT INTO dbo.Person (PersonID, LastName, FirstName, HireDate, EnrollmentDate)
VALUES (22, 'Alexander', 'Carson', null, '2005-09-01');
INSERT INTO dbo.Person (PersonID, LastName, FirstName, HireDate, EnrollmentDate)
VALUES (23, 'Morgan', 'Isaiah', null, '2001-09-01');
INSERT INTO dbo.Person (PersonID, LastName, FirstName, HireDate, EnrollmentDate)
VALUES (24, 'Martin', 'Randall', null, '2005-09-01');
INSERT INTO dbo.Person (PersonID, LastName, FirstName, HireDate, EnrollmentDate)
VALUES (25, 'Kapoor', 'Candace', '2001-01-15', null);
INSERT INTO dbo.Person (PersonID, LastName, FirstName, HireDate, EnrollmentDate)
VALUES (26, 'Rogers', 'Cody', null, '2002-09-01');
INSERT INTO dbo.Person (PersonID, LastName, FirstName, HireDate, EnrollmentDate)
VALUES (27, 'Serrano', 'Stacy', '1999-06-01', null);
INSERT INTO dbo.Person (PersonID, LastName, FirstName, HireDate, EnrollmentDate)
VALUES (28, 'White', 'Anthony', null, '2001-09-01');
INSERT INTO dbo.Person (PersonID, LastName, FirstName, HireDate, EnrollmentDate)
VALUES (29, 'Griffin', 'Rachel', null, '2004-09-01');
INSERT INTO dbo.Person (PersonID, LastName, FirstName, HireDate, EnrollmentDate)
VALUES (30, 'Shan', 'Alicia', null, '2003-09-01');
INSERT INTO dbo.Person (PersonID, LastName, FirstName, HireDate, EnrollmentDate)
VALUES (31, 'Stewart', 'Jasmine', '1997-10-12', null);
INSERT INTO dbo.Person (PersonID, LastName, FirstName, HireDate, EnrollmentDate)
VALUES (32, 'Xu', 'Kristen', '2001-7-23', null);
INSERT INTO dbo.Person (PersonID, LastName, FirstName, HireDate, EnrollmentDate)
VALUES (33, 'Gao', 'Erica', null, '2003-01-30');
INSERT INTO dbo.Person (PersonID, LastName, FirstName, HireDate, EnrollmentDate)
VALUES (34, 'Van Houten', 'Roger', '2000-12-07', null);
GO
SET IDENTITY_INSERT dbo.Person OFF
GO
-- Insert data into the Department table.
INSERT INTO dbo.Department (DepartmentID, [Name], Budget, StartDate, Administrator)
VALUES (1, 'Engineering', 350000.00, '2007-09-01', 2);
INSERT INTO dbo.Department (DepartmentID, [Name], Budget, StartDate, Administrator)
VALUES (2, 'English', 120000.00, '2007-09-01', 6);
INSERT INTO dbo.Department (DepartmentID, [Name], Budget, StartDate, Administrator)
VALUES (4, 'Economics', 200000.00, '2007-09-01', 4);
INSERT INTO dbo.Department (DepartmentID, [Name], Budget, StartDate, Administrator)
VALUES (7, 'Mathematics', 250000.00, '2007-09-01', 3);
GO
-- Insert data into the Course table.
INSERT INTO dbo.Course (CourseID, Title, Credits, DepartmentID)
VALUES (1050, 'Chemistry', 4, 1);
INSERT INTO dbo.Course (CourseID, Title, Credits, DepartmentID)
VALUES (1061, 'Physics', 4, 1);
INSERT INTO dbo.Course (CourseID, Title, Credits, DepartmentID)
VALUES (1045, 'Calculus', 4, 7);
INSERT INTO dbo.Course (CourseID, Title, Credits, DepartmentID)
VALUES (2030, 'Poetry', 2, 2);
INSERT INTO dbo.Course (CourseID, Title, Credits, DepartmentID)
VALUES (2021, 'Composition', 3, 2);
INSERT INTO dbo.Course (CourseID, Title, Credits, DepartmentID)
VALUES (2042, 'Literature', 4, 2);
INSERT INTO dbo.Course (CourseID, Title, Credits, DepartmentID)
VALUES (4022, 'Microeconomics', 3, 4);
INSERT INTO dbo.Course (CourseID, Title, Credits, DepartmentID)
VALUES (4041, 'Macroeconomics', 3, 4);
INSERT INTO dbo.Course (CourseID, Title, Credits, DepartmentID)
VALUES (4061, 'Quantitative', 2, 4);
INSERT INTO dbo.Course (CourseID, Title, Credits, DepartmentID)
VALUES (3141, 'Trigonometry', 4, 7);
GO
-- Insert data into the OnlineCourse table.
INSERT INTO dbo.OnlineCourse (CourseID, URL)
VALUES (2030, 'http://www.fineartschool.net/Poetry');
INSERT INTO dbo.OnlineCourse (CourseID, URL)
VALUES (2021, 'http://www.fineartschool.net/Composition');
INSERT INTO dbo.OnlineCourse (CourseID, URL)
VALUES (4041, 'http://www.fineartschool.net/Macroeconomics');
INSERT INTO dbo.OnlineCourse (CourseID, URL)
VALUES (3141, 'http://www.fineartschool.net/Trigonometry');
--Insert data into OnsiteCourse table.
INSERT INTO dbo.OnsiteCourse (CourseID, Location, Days, [Time])
VALUES (1050, '123 Smith', 'MTWH', '11:30');
INSERT INTO dbo.OnsiteCourse (CourseID, Location, Days, [Time])
VALUES (1061, '234 Smith', 'TWHF', '13:15');
INSERT INTO dbo.OnsiteCourse (CourseID, Location, Days, [Time])
VALUES (1045, '121 Smith','MWHF', '15:30');
INSERT INTO dbo.OnsiteCourse (CourseID, Location, Days, [Time])
VALUES (4061, '22 Williams', 'TH', '11:15');
INSERT INTO dbo.OnsiteCourse (CourseID, Location, Days, [Time])
VALUES (2042, '225 Adams', 'MTWH', '11:00');
INSERT INTO dbo.OnsiteCourse (CourseID, Location, Days, [Time])
VALUES (4022, '23 Williams', 'MWF', '9:00');
-- Insert data into the CourseInstructor table.
INSERT INTO dbo.CourseInstructor(CourseID, PersonID)
VALUES (1050, 1);
INSERT INTO dbo.CourseInstructor(CourseID, PersonID)
VALUES (1061, 31);
INSERT INTO dbo.CourseInstructor(CourseID, PersonID)
VALUES (1045, 5);
INSERT INTO dbo.CourseInstructor(CourseID, PersonID)
VALUES (2030, 4);
INSERT INTO dbo.CourseInstructor(CourseID, PersonID)
VALUES (2021, 27);
INSERT INTO dbo.CourseInstructor(CourseID, PersonID)
VALUES (2042, 25);
INSERT INTO dbo.CourseInstructor(CourseID, PersonID)
VALUES (4022, 18);
INSERT INTO dbo.CourseInstructor(CourseID, PersonID)
VALUES (4041, 32);
INSERT INTO dbo.CourseInstructor(CourseID, PersonID)
VALUES (4061, 34);
GO
--Insert data into the OfficeAssignment table.
INSERT INTO dbo.OfficeAssignment(InstructorID, Location)
VALUES (1, '17 Smith');
INSERT INTO dbo.OfficeAssignment(InstructorID, Location)
VALUES (4, '29 Adams');
INSERT INTO dbo.OfficeAssignment(InstructorID, Location)
VALUES (5, '37 Williams');
INSERT INTO dbo.OfficeAssignment(InstructorID, Location)
VALUES (18, '143 Smith');
INSERT INTO dbo.OfficeAssignment(InstructorID, Location)
VALUES (25, '57 Adams');
INSERT INTO dbo.OfficeAssignment(InstructorID, Location)
VALUES (27, '271 Williams');
INSERT INTO dbo.OfficeAssignment(InstructorID, Location)
VALUES (31, '131 Smith');
INSERT INTO dbo.OfficeAssignment(InstructorID, Location)
VALUES (32, '203 Williams');
INSERT INTO dbo.OfficeAssignment(InstructorID, Location)
VALUES (34, '213 Smith');
-- Insert data into the StudentGrade table.
INSERT INTO dbo.StudentGrade (CourseID, StudentID, Grade)
VALUES (2021, 2, 4);
INSERT INTO dbo.StudentGrade (CourseID, StudentID, Grade)
VALUES (2030, 2, 3.5);
INSERT INTO dbo.StudentGrade (CourseID, StudentID, Grade)
VALUES (2021, 3, 3);
INSERT INTO dbo.StudentGrade (CourseID, StudentID, Grade)
VALUES (2030, 3, 4);
INSERT INTO dbo.StudentGrade (CourseID, StudentID, Grade)
VALUES (2021, 6, 2.5);
INSERT INTO dbo.StudentGrade (CourseID, StudentID, Grade)
VALUES (2042, 6, 3.5);
INSERT INTO dbo.StudentGrade (CourseID, StudentID, Grade)
VALUES (2021, 7, 3.5);
INSERT INTO dbo.StudentGrade (CourseID, StudentID, Grade)
VALUES (2042, 7, 4);
INSERT INTO dbo.StudentGrade (CourseID, StudentID, Grade)
VALUES (2021, 8, 3);
INSERT INTO dbo.StudentGrade (CourseID, StudentID, Grade)
VALUES (2042, 8, 3);
INSERT INTO dbo.StudentGrade (CourseID, StudentID, Grade)
VALUES (4041, 9, 3.5);
INSERT INTO dbo.StudentGrade (CourseID, StudentID, Grade)
VALUES (4041, 10, null);
INSERT INTO dbo.StudentGrade (CourseID, StudentID, Grade)
VALUES (4041, 11, 2.5);
INSERT INTO dbo.StudentGrade (CourseID, StudentID, Grade)
VALUES (4041, 12, null);
INSERT INTO dbo.StudentGrade (CourseID, StudentID, Grade)
VALUES (4061, 12, null);
INSERT INTO dbo.StudentGrade (CourseID, StudentID, Grade)
VALUES (4022, 14, 3);
INSERT INTO dbo.StudentGrade (CourseID, StudentID, Grade)
VALUES (4022, 13, 4);
INSERT INTO dbo.StudentGrade (CourseID, StudentID, Grade)
VALUES (4061, 13, 4);
INSERT INTO dbo.StudentGrade (CourseID, StudentID, Grade)
VALUES (4041, 14, 3);
INSERT INTO dbo.StudentGrade (CourseID, StudentID, Grade)
VALUES (4022, 15, 2.5);
INSERT INTO dbo.StudentGrade (CourseID, StudentID, Grade)
VALUES (4022, 16, 2);
INSERT INTO dbo.StudentGrade (CourseID, StudentID, Grade)
VALUES (4022, 17, null);
INSERT INTO dbo.StudentGrade (CourseID, StudentID, Grade)
VALUES (4022, 19, 3.5);
INSERT INTO dbo.StudentGrade (CourseID, StudentID, Grade)
VALUES (4061, 20, 4);
INSERT INTO dbo.StudentGrade (CourseID, StudentID, Grade)
VALUES (4061, 21, 2);
INSERT INTO dbo.StudentGrade (CourseID, StudentID, Grade)
VALUES (4022, 22, 3);
INSERT INTO dbo.StudentGrade (CourseID, StudentID, Grade)
VALUES (4041, 22, 3.5);
INSERT INTO dbo.StudentGrade (CourseID, StudentID, Grade)
VALUES (4061, 22, 2.5);
INSERT INTO dbo.StudentGrade (CourseID, StudentID, Grade)
VALUES (4022, 23, 3);
INSERT INTO dbo.StudentGrade (CourseID, StudentID, Grade)
VALUES (1045, 23, 1.5);
INSERT INTO dbo.StudentGrade (CourseID, StudentID, Grade)
VALUES (1061, 24, 4);
INSERT INTO dbo.StudentGrade (CourseID, StudentID, Grade)
VALUES (1061, 25, 3);
INSERT INTO dbo.StudentGrade (CourseID, StudentID, Grade)
VALUES (1050, 26, 3.5);
INSERT INTO dbo.StudentGrade (CourseID, StudentID, Grade)
VALUES (1061, 26, 3);
INSERT INTO dbo.StudentGrade (CourseID, StudentID, Grade)
VALUES (1061, 27, 3);
INSERT INTO dbo.StudentGrade (CourseID, StudentID, Grade)
VALUES (1045, 28, 2.5);
INSERT INTO dbo.StudentGrade (CourseID, StudentID, Grade)
VALUES (1050, 28, 3.5);
INSERT INTO dbo.StudentGrade (CourseID, StudentID, Grade)
VALUES (1061, 29, 4);
INSERT INTO dbo.StudentGrade (CourseID, StudentID, Grade)
VALUES (1050, 30, 3.5);
INSERT INTO dbo.StudentGrade (CourseID, StudentID, Grade)
VALUES (1061, 30, 4);
GO
3：RIA之ADO.NET ENTITY DATA MODEL
為web創建ADO.NET ENTITY DATA MODEL，如圖：
注意，習慣命名規則：Model數據庫名.edmx。
在下一步中，我們選擇剛才創建的數據庫：
選擇新建連接，按照指示完成數據庫連接配置。
進入下一步：
在這一步中，注意一定要選擇第一個紅框中的內容，否則默認不能生成聯表查詢。在下一步中，我們選擇“Generate from database”，如下：
點擊Finish后，VS為我們生成了一個以edmx為后綴的文件。OK，到此暫停，我們先來看看這個edmx文件是干什么用的，為我們完成了什么工作。
3.1：什么是EDM
ENTITY DATA MODEL，簡寫為EDM，中文為實體數據模型。它由三個概念組成。概念模型由概念架構定義語言文件 (.csdl)來定義，映射由映射規范語言文件 (.msl)，存儲模型（又稱邏輯模型）由存儲架構定義語言文件 (.ssdl)來定義。這三者合在一起就是EDM模型。EDM模型在項目中的表現形式就是擴展名為.edmx的文件。
Entity Framework實現了一套類似于ADO.NET2.0中的連接類來操作EDM完成持久化。EntityFramework中所有發往EDM的操作都是經過EntityClient，包括使用LINQ to Entity進行的操作。目前可用操作如下：
4：針對web EMD的測試
理解了EMD在開發中所處的作用，我們就可以針對EDM來寫個測試項目。為了簡便期間，我們直接在EMD中的SchoolEntities類型的構造方法中直接創建測試（嚴格意義來說，這不是個單元測試，這僅是測試）。
針對這個操作，會在測試項目中生成一個SchoolEntitiesTest的類型，同時，在這個類型中會生成一個SchoolEntitiesConstructorTest的方法，如下：
由于我們僅僅測試EDM，而跟WEB本身沒有關系，所有我們注釋掉了紅框中的內容。同時我們寫入真正的測試代碼，如下：
這里的一個小細節是，連接字符串我們通過編碼的方式傳入到測試方法。EDM的連接字符串和ADO.NET的連接字符串有很大不同，在這里，可公開一下我們的生成EDM連接字符串的方法：
public string GetConnectionString()
{
string providerName = "System.Data.SqlClient";
string serverName = "192.168.0.96";
string databaseName = "mysample";
SqlConnectionStringBuilder sqlBuilder = new SqlConnectionStringBuilder();
sqlBuilder.DataSource = serverName;
sqlBuilder.InitialCatalog = databaseName;
sqlBuilder.IntegratedSecurity = false;
sqlBuilder.UserID = "sa";
sqlBuilder.Password = "sasa";
string providerString = sqlBuilder.ToString();
EntityConnectionStringBuilder entityBuilder = new EntityConnectionStringBuilder();
entityBuilder.Provider = providerName;
entityBuilder.ProviderConnectionString = providerString;
entityBuilder.Provider = providerName;
entityBuilder.Metadata = "res://*/Modelmysample.csdl|res://*/Modelmysample.ssdl|res://*/Modelmysample.msl";
return entityBuilder.ToString();
}
調試我們的測試代碼，最終我們會獲取到數據庫中的4條記錄。
通過了以上的闡述，我們了解了EDM的作用，以及如何測試EDM。接下來，我們需要知道如何在SL APP中調用WEB中的EDM。
5：Domain Service Class
在SL APP中調用EDM是通過WEB的Domain Service Class來實現的。簡單的說來，它是RIA SERVICE框架中的一個重要內容。
在WEB選擇添加新項，選擇Domain Service Class，命名，下一步會出現如下界面：
我們可以做出如上勾選。確定后，編譯整個解決方法，會發現目前的解決方案結構會變成如下形式：
注意，第一個紅框部分，是VS自動為我們在SL APP生成的。它是第二個紅框在客戶端的對應版本。我們需要將它包含到項目中去。它包含了所有服務端版本類中定義的方法、實體等，而可在客戶端直接調用。
6：Ria Service數據流轉
好了，經過以上的描述我們知道了：
EDM：直接操作數據庫；
Domain Service Class：調用EDM，并把數據接口通過WCF的形式開放給客戶端；
*.Web.g.cs：調用Domain Service Class，完成對數據的讀取，并最終呈現給UI；
7：最終展示
在SL APP中的UI調用呈現數據。前臺：
后臺，直接使用*.Web.g.cs中的DomainServiceMySample 加載數據：
public MainPage()
{
InitializeComponent();
DomainServiceMySample context = new DomainServiceMySample();
context.Load(context.GetEmpQuery());
lb1.ItemsSource = context.emps;
}
最后界面顯示：
8：問題
該示例演示了使用Entity Framework和WCF Ria Services進行Silverlight開發。我們當然可以繼續使用此模式完善功能，知道一個功能復雜的應用程序開發完畢。但是，當前，此示例起碼存在如下幾個問題。
1：實體模型被緊耦合在EDM中，同時它不能項目（模塊）使用。隨著每一次更新EDM，實體模型會被覆蓋；
2：EDM和BLL緊耦合在一起；
3：沒有提煉出數據接口，導致我們沒有辦法在此示例中進行單元測試。示例中雖然存在測試項目，但那是數據庫相關的，達不到單元測試的要求；
下篇我們將繼續重構該示例，以逐步解決這些問題。
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