（转）使用Entity Framework和WCF Ria Services开发SilverLight之1：简单模型

原文地址：http://www.cnblogs.com/luminji/archive/2011/06/10/2077696.html

本文目的是通过Silverlight ria service完成一次数据的读取过程，并且在此基础上建立测试项目。

Ria service借助于WCF和ADO.NET Entity Framework构建分布式开发框架。使用它可以快速构建自己的开发模式。

1：基础结构

首先，创建SL APP，如下：

然后，选择创建web：

可以，也可以不勾选enable wcf ria service，如果勾选了，在SL APP中会多几个DLL的引用，其它没有任何差别。如图：

2：创建一个示例数据库

这是一个小而轻型的数据库，在MDSN的课程中有使用到它。如下：

show sourceview sourceprint?

001	SET ANSI_NULLS ON

002

GO

003	SET QUOTED_IDENTIFIER ON

004

GO

005

006	USE [master];

007

GO

008

009	IF EXISTS (SELECT * FROM sys.databases WHERE name = 'School')

010	DROP DATABASE School;

011

GO

012

013	-- Create the School database.

014	CREATE DATABASE School;

015

GO

016

017	-- Specify a simple recovery model

018	-- to keep the log growth to a minimum.

019	ALTER DATABASE School

020	SET RECOVERY SIMPLE;

021

GO

022

023	USE School;

024

GO

025

026	-- Create the Department table.

027	IF NOT EXISTS (SELECT * FROM sys.objects

028	WHERE object_id = OBJECT_ID(N'[dbo].[Department]')

029	AND type in (N'U'))

030

BEGIN

031	CREATE TABLE [dbo].[Department](

032	[DepartmentID] [int] NOT NULL,

033	[Name] [nvarchar](50) NOT NULL,

034	[Budget] [money] NOT NULL,

035	[StartDate] [datetime] NOT NULL,

036	[Administrator] [int] NULL,

037	CONSTRAINT [PK_Department] PRIMARY KEY CLUSTERED

038

(

039	[DepartmentID] ASC

040	)WITH (IGNORE_DUP_KEY = OFF) ON [PRIMARY]

041	) ON [PRIMARY]

042

END

043

GO

044

045	-- Create the Person table.

046	IF NOT EXISTS (SELECT * FROM sys.objects

047	WHERE object_id = OBJECT_ID(N'[dbo].[Person]')

048	AND type in (N'U'))

049

BEGIN

050	CREATE TABLE [dbo].[Person](

051	[PersonID] [int] IDENTITY(1,1) NOT NULL,

052	[LastName] [nvarchar](50) NOT NULL,

053	[FirstName] [nvarchar](50) NOT NULL,

054	[HireDate] [datetime] NULL,

055	[EnrollmentDate] [datetime] NULL,

056	CONSTRAINT [PK_School.Student] PRIMARY KEY CLUSTERED

057

(

058	[PersonID] ASC

059	)WITH (IGNORE_DUP_KEY = OFF) ON [PRIMARY]

060	) ON [PRIMARY]

061

END

062

GO

063

064	-- Create the OnsiteCourse table.

065	IF NOT EXISTS (SELECT * FROM sys.objects

066	WHERE object_id = OBJECT_ID(N'[dbo].[OnsiteCourse]')

067	AND type in (N'U'))

068

BEGIN

069	CREATE TABLE [dbo].[OnsiteCourse](

070	[CourseID] [int] NOT NULL,

071	[Location] [nvarchar](50) NOT NULL,

072	[Days] [nvarchar](50) NOT NULL,

073	[Time] [smalldatetime] NOT NULL,

074	CONSTRAINT [PK_OnsiteCourse] PRIMARY KEY CLUSTERED

075

(

076	[CourseID] ASC

077	)WITH (IGNORE_DUP_KEY = OFF) ON [PRIMARY]

078	) ON [PRIMARY]

079

END

080

GO

081

082	-- Create the OnlineCourse table.

083	IF NOT EXISTS (SELECT * FROM sys.objects

084	WHERE object_id = OBJECT_ID(N'[dbo].[OnlineCourse]')

085	AND type in (N'U'))

086

BEGIN

087	CREATE TABLE [dbo].[OnlineCourse](

088	[CourseID] [int] NOT NULL,

089	[URL] [nvarchar](100) NOT NULL,

090	CONSTRAINT [PK_OnlineCourse] PRIMARY KEY CLUSTERED

091

(

092	[CourseID] ASC

093	)WITH (IGNORE_DUP_KEY = OFF) ON [PRIMARY]

094	) ON [PRIMARY]

095

END

096

GO

097

098	--Create the StudentGrade table.

099	IF NOT EXISTS (SELECT * FROM sys.objects

100	WHERE object_id = OBJECT_ID(N'[dbo].[StudentGrade]')

101	AND type in (N'U'))

102

BEGIN

103	CREATE TABLE [dbo].[StudentGrade](

104	[EnrollmentID] [int] IDENTITY(1,1) NOT NULL,

105	[CourseID] [int] NOT NULL,

106	[StudentID] [int] NOT NULL,

107	[Grade] [decimal](3, 2) NULL,

108	CONSTRAINT [PK_StudentGrade] PRIMARY KEY CLUSTERED

109

(

110	[EnrollmentID] ASC

111	)WITH (IGNORE_DUP_KEY = OFF) ON [PRIMARY]

112	) ON [PRIMARY]

113

END

114

GO

115

116	-- Create the CourseInstructor table.

117	IF NOT EXISTS (SELECT * FROM sys.objects

118	WHERE object_id = OBJECT_ID(N'[dbo].[CourseInstructor]')

119	AND type in (N'U'))

120

BEGIN

121	CREATE TABLE [dbo].[CourseInstructor](

122	[CourseID] [int] NOT NULL,

123	[PersonID] [int] NOT NULL,

124	CONSTRAINT [PK_CourseInstructor] PRIMARY KEY CLUSTERED

125

(

126	[CourseID] ASC,

127	[PersonID] ASC

128	)WITH (IGNORE_DUP_KEY = OFF) ON [PRIMARY]

129	) ON [PRIMARY]

130

END

131

GO

132

133	-- Create the Course table.

134	IF NOT EXISTS (SELECT * FROM sys.objects

135	WHERE object_id = OBJECT_ID(N'[dbo].[Course]')

136	AND type in (N'U'))

137

BEGIN

138	CREATE TABLE [dbo].[Course](

139	[CourseID] [int] NOT NULL,

140	[Title] [nvarchar](100) NOT NULL,

141	[Credits] [int] NOT NULL,

142	[DepartmentID] [int] NOT NULL,

143	CONSTRAINT [PK_School.Course] PRIMARY KEY CLUSTERED

144

(

145	[CourseID] ASC

146	)WITH (IGNORE_DUP_KEY = OFF) ON [PRIMARY]

147	) ON [PRIMARY]

148

END

149

GO

150

151	-- Create the OfficeAssignment table.

152	IF NOT EXISTS (SELECT * FROM sys.objects

153	WHERE object_id = OBJECT_ID(N'[dbo].[OfficeAssignment]')

154	AND type in (N'U'))

155

BEGIN

156	CREATE TABLE [dbo].[OfficeAssignment](

157	[InstructorID] [int] NOT NULL,

158	[Location] [nvarchar](50) NOT NULL,

159	[Timestamp] [timestamp] NOT NULL,

160	CONSTRAINT [PK_OfficeAssignment] PRIMARY KEY CLUSTERED

161

(

162	[InstructorID] ASC

163	)WITH (IGNORE_DUP_KEY = OFF) ON [PRIMARY]

164	) ON [PRIMARY]

165

END

166

GO

167

168	-- Define the relationship between OnsiteCourse and Course.

169	IF NOT EXISTS (SELECT * FROM sys.foreign_keys

170	WHERE object_id = OBJECT_ID(N'[dbo].[FK_OnsiteCourse_Course]')

171	AND parent_object_id = OBJECT_ID(N'[dbo].[OnsiteCourse]'))

172	ALTER TABLE [dbo].[OnsiteCourse]  WITH CHECK ADD

173	CONSTRAINT [FK_OnsiteCourse_Course] FOREIGN KEY([CourseID])

174	REFERENCES [dbo].[Course] ([CourseID])

175

GO

176	ALTER TABLE [dbo].[OnsiteCourse] CHECK

177	CONSTRAINT [FK_OnsiteCourse_Course]

178

GO

179

180	-- Define the relationship between OnlineCourse and Course.

181	IF NOT EXISTS (SELECT * FROM sys.foreign_keys

182	WHERE object_id = OBJECT_ID(N'[dbo].[FK_OnlineCourse_Course]')

183	AND parent_object_id = OBJECT_ID(N'[dbo].[OnlineCourse]'))

184	ALTER TABLE [dbo].[OnlineCourse]  WITH CHECK ADD

185	CONSTRAINT [FK_OnlineCourse_Course] FOREIGN KEY([CourseID])

186	REFERENCES [dbo].[Course] ([CourseID])

187

GO

188	ALTER TABLE [dbo].[OnlineCourse] CHECK

189	CONSTRAINT [FK_OnlineCourse_Course]

190

GO

191

192	-- Define the relationship between StudentGrade and Course.

193	IF NOT EXISTS (SELECT * FROM sys.foreign_keys

194	WHERE object_id = OBJECT_ID(N'[dbo].[FK_StudentGrade_Course]')

195	AND parent_object_id = OBJECT_ID(N'[dbo].[StudentGrade]'))

196	ALTER TABLE [dbo].[StudentGrade]  WITH CHECK ADD

197	CONSTRAINT [FK_StudentGrade_Course] FOREIGN KEY([CourseID])

198	REFERENCES [dbo].[Course] ([CourseID])

199

GO

200	ALTER TABLE [dbo].[StudentGrade] CHECK

201	CONSTRAINT [FK_StudentGrade_Course]

202

GO

203

204	--Define the relationship between StudentGrade and Student.

205	IF NOT EXISTS (SELECT * FROM sys.foreign_keys

206	WHERE object_id = OBJECT_ID(N'[dbo].[FK_StudentGrade_Student]')

207	AND parent_object_id = OBJECT_ID(N'[dbo].[StudentGrade]'))

208	ALTER TABLE [dbo].[StudentGrade]  WITH CHECK ADD

209	CONSTRAINT [FK_StudentGrade_Student] FOREIGN KEY([StudentID])

210	REFERENCES [dbo].[Person] ([PersonID])

211

GO

212	ALTER TABLE [dbo].[StudentGrade] CHECK

213	CONSTRAINT [FK_StudentGrade_Student]

214

GO

215

216	-- Define the relationship between CourseInstructor and Course.

217	IF NOT EXISTS (SELECT * FROM sys.foreign_keys

218	WHERE object_id = OBJECT_ID(N'[dbo].[FK_CourseInstructor_Course]')

219	AND parent_object_id = OBJECT_ID(N'[dbo].[CourseInstructor]'))

220	ALTER TABLE [dbo].[CourseInstructor]  WITH CHECK ADD

221	CONSTRAINT [FK_CourseInstructor_Course] FOREIGN KEY([CourseID])

222	REFERENCES [dbo].[Course] ([CourseID])

223

GO

224	ALTER TABLE [dbo].[CourseInstructor] CHECK

225	CONSTRAINT [FK_CourseInstructor_Course]

226

GO

227

228	-- Define the relationship between CourseInstructor and Person.

229	IF NOT EXISTS (SELECT * FROM sys.foreign_keys

230	WHERE object_id = OBJECT_ID(N'[dbo].[FK_CourseInstructor_Person]')

231	AND parent_object_id = OBJECT_ID(N'[dbo].[CourseInstructor]'))

232	ALTER TABLE [dbo].[CourseInstructor]  WITH CHECK ADD

233	CONSTRAINT [FK_CourseInstructor_Person] FOREIGN KEY([PersonID])

234	REFERENCES [dbo].[Person] ([PersonID])

235

GO

236	ALTER TABLE [dbo].[CourseInstructor] CHECK

237	CONSTRAINT [FK_CourseInstructor_Person]

238

GO

239

240	-- Define the relationship between Course and Department.

241	IF NOT EXISTS (SELECT * FROM sys.foreign_keys

242	WHERE object_id = OBJECT_ID(N'[dbo].[FK_Course_Department]')

243	AND parent_object_id = OBJECT_ID(N'[dbo].[Course]'))

244	ALTER TABLE [dbo].[Course]  WITH CHECK ADD

245	CONSTRAINT [FK_Course_Department] FOREIGN KEY([DepartmentID])

246	REFERENCES [dbo].[Department] ([DepartmentID])

247

GO

248	ALTER TABLE [dbo].[Course] CHECK CONSTRAINT [FK_Course_Department]

249

GO

250

251	--Define the relationship between OfficeAssignment and Person.

252	IF NOT EXISTS (SELECT * FROM sys.foreign_keys

253	WHERE object_id = OBJECT_ID(N'[dbo].[FK_OfficeAssignment_Person]')

254	AND parent_object_id = OBJECT_ID(N'[dbo].[OfficeAssignment]'))

255	ALTER TABLE [dbo].[OfficeAssignment]  WITH CHECK ADD

256	CONSTRAINT [FK_OfficeAssignment_Person] FOREIGN KEY([InstructorID])

257	REFERENCES [dbo].[Person] ([PersonID])

258

GO

259	ALTER TABLE [dbo].[OfficeAssignment] CHECK

260	CONSTRAINT [FK_OfficeAssignment_Person]

261

GO

262

263	-- Create InsertOfficeAssignment stored procedure.

264	IF NOT EXISTS (SELECT * FROM sys.objects

265	WHERE object_id = OBJECT_ID(N'[dbo].[InsertOfficeAssignment]')

266	AND type in (N'P', N'PC'))

267

BEGIN

268	EXEC dbo.sp_executesql @statement = N'

269	CREATE PROCEDURE [dbo].[InsertOfficeAssignment]

270	@InstructorID int,

271	@Location nvarchar(50)

272

AS

273	INSERT INTO dbo.OfficeAssignment (InstructorID, Location)

274	VALUES (@InstructorID, @Location);

275	IF @@ROWCOUNT > 0

276

BEGIN

277	SELECT [Timestamp] FROM OfficeAssignment

278	WHERE InstructorID=@InstructorID;

279

END

280

'

281

END

282

GO

283

284	--Create the UpdateOfficeAssignment stored procedure.

285	IF NOT EXISTS (SELECT * FROM sys.objects

286	WHERE object_id = OBJECT_ID(N'[dbo].[UpdateOfficeAssignment]')

287	AND type in (N'P', N'PC'))

288

BEGIN

289	EXEC dbo.sp_executesql @statement = N'

290	CREATE PROCEDURE [dbo].[UpdateOfficeAssignment]

291	@InstructorID int,

292	@Location nvarchar(50),

293	@OrigTimestamp timestamp

294

AS

295	UPDATE OfficeAssignment SET Location=@Location

296	WHERE InstructorID=@InstructorID AND [Timestamp]=@OrigTimestamp;

297	IF @@ROWCOUNT > 0

298

BEGIN

299	SELECT [Timestamp] FROM OfficeAssignment

300	WHERE InstructorID=@InstructorID;

301

END

302

'

303

END

304

GO

305

306	-- Create the DeleteOfficeAssignment stored procedure.

307	IF NOT EXISTS (SELECT * FROM sys.objects

308	WHERE object_id = OBJECT_ID(N'[dbo].[DeleteOfficeAssignment]')

309	AND type in (N'P', N'PC'))

310

BEGIN

311	EXEC dbo.sp_executesql @statement = N'

312	CREATE PROCEDURE [dbo].[DeleteOfficeAssignment]

313	@InstructorID int

314

AS

315	DELETE FROM OfficeAssignment

316	WHERE InstructorID=@InstructorID;

317

'

318

END

319

GO

320

321	-- Create the DeletePerson stored procedure.

322	IF NOT EXISTS (SELECT * FROM sys.objects

323	WHERE object_id = OBJECT_ID(N'[dbo].[DeletePerson]')

324	AND type in (N'P', N'PC'))

325

BEGIN

326	EXEC dbo.sp_executesql @statement = N'

327	CREATE PROCEDURE [dbo].[DeletePerson]

328	@PersonID int

329

AS

330	DELETE FROM Person WHERE PersonID = @PersonID;

331

'

332

END

333

GO

334

335	-- Create the UpdatePerson stored procedure.

336	IF NOT EXISTS (SELECT * FROM sys.objects

337	WHERE object_id = OBJECT_ID(N'[dbo].[UpdatePerson]')

338	AND type in (N'P', N'PC'))

339

BEGIN

340	EXEC dbo.sp_executesql @statement = N'

341	CREATE PROCEDURE [dbo].[UpdatePerson]

342	@PersonID int,

343	@LastName nvarchar(50),

344	@FirstName nvarchar(50),

345	@HireDate datetime,

346	@EnrollmentDate datetime

347

AS

348	UPDATE Person SET LastName=@LastName,

349	FirstName=@FirstName,

350	HireDate=@HireDate,

351	EnrollmentDate=@EnrollmentDate

352	WHERE PersonID=@PersonID;

353

'

354

END

355

GO

356

357	-- Create the InsertPerson stored procedure.

358	IF NOT EXISTS (SELECT * FROM sys.objects

359	WHERE object_id = OBJECT_ID(N'[dbo].[InsertPerson]')

360	AND type in (N'P', N'PC'))

361

BEGIN

362	EXEC dbo.sp_executesql @statement = N'

363	CREATE PROCEDURE [dbo].[InsertPerson]

364	@LastName nvarchar(50),

365	@FirstName nvarchar(50),

366	@HireDate datetime,

367	@EnrollmentDate datetime

368

AS

369	INSERT INTO dbo.Person (LastName,

370	FirstName,

371

HireDate,

372	EnrollmentDate)

373	VALUES (@LastName,

374	@FirstName,

375	@HireDate,

376	@EnrollmentDate);

377	SELECT SCOPE_IDENTITY() as NewPersonID;

378

'

379

END

380

GO

381

382	-- Create GetStudentGrades stored procedure.

383	IF NOT EXISTS (SELECT * FROM sys.objects

384	WHERE object_id = OBJECT_ID(N'[dbo].[GetStudentGrades]')

385	AND type in (N'P', N'PC'))

386

BEGIN

387	EXEC dbo.sp_executesql @statement = N'

388	CREATE PROCEDURE [dbo].[GetStudentGrades]

389	@StudentID int

390

AS

391	SELECT EnrollmentID, Grade, CourseID, StudentID FROM dbo.StudentGrade

392	WHERE StudentID = @StudentID

393

'

394

END

395

GO

396

397	-- Create GetDepartmentName stored procedure.

398	IF NOT EXISTS (SELECT * FROM sys.objects

399	WHERE object_id = OBJECT_ID(N'[dbo].[GetDepartmentName]')

400	AND type in (N'P', N'PC'))

401

BEGIN

402	EXEC dbo.sp_executesql @statement = N'

403	CREATE PROCEDURE [dbo].[GetDepartmentName]

404

@ID int,

405	@Name nvarchar(50) OUTPUT

406

AS

407	SELECT @Name = Name FROM Department

408	WHERE DepartmentID = @ID

409

'

410

END

411

GO

412

413	-- Insert data into the Person table.

414	USE School

415

GO

416	SET IDENTITY_INSERT dbo.Person ON

417

GO

418	INSERT INTO dbo.Person (PersonID, LastName, FirstName, HireDate, EnrollmentDate)

419	VALUES (1, 'Abercrombie', 'Kim', '1995-03-11', null);

420	INSERT INTO dbo.Person (PersonID, LastName, FirstName, HireDate, EnrollmentDate)

421	VALUES (2, 'Barzdukas', 'Gytis', null, '2005-09-01');

422	INSERT INTO dbo.Person (PersonID, LastName, FirstName, HireDate, EnrollmentDate)

423	VALUES (3, 'Justice', 'Peggy', null, '2001-09-01');

424	INSERT INTO dbo.Person (PersonID, LastName, FirstName, HireDate, EnrollmentDate)

425	VALUES (4, 'Fakhouri', 'Fadi', '2002-08-06', null);

426	INSERT INTO dbo.Person (PersonID, LastName, FirstName, HireDate, EnrollmentDate)

427	VALUES (5, 'Harui', 'Roger', '1998-07-01', null);

428	INSERT INTO dbo.Person (PersonID, LastName, FirstName, HireDate, EnrollmentDate)

429	VALUES (6, 'Li', 'Yan', null, '2002-09-01');

430	INSERT INTO dbo.Person (PersonID, LastName, FirstName, HireDate, EnrollmentDate)

431	VALUES (7, 'Norman', 'Laura', null, '2003-09-01');

432	INSERT INTO dbo.Person (PersonID, LastName, FirstName, HireDate, EnrollmentDate)

433	VALUES (8, 'Olivotto', 'Nino', null, '2005-09-01');

434	INSERT INTO dbo.Person (PersonID, LastName, FirstName, HireDate, EnrollmentDate)

435	VALUES (9, 'Tang', 'Wayne', null, '2005-09-01');

436	INSERT INTO dbo.Person (PersonID, LastName, FirstName, HireDate, EnrollmentDate)

437	VALUES (10, 'Alonso', 'Meredith', null, '2002-09-01');

438	INSERT INTO dbo.Person (PersonID, LastName, FirstName, HireDate, EnrollmentDate)

439	VALUES (11, 'Lopez', 'Sophia', null, '2004-09-01');

440	INSERT INTO dbo.Person (PersonID, LastName, FirstName, HireDate, EnrollmentDate)

441	VALUES (12, 'Browning', 'Meredith', null, '2000-09-01');

442	INSERT INTO dbo.Person (PersonID, LastName, FirstName, HireDate, EnrollmentDate)

443	VALUES (13, 'Anand', 'Arturo', null, '2003-09-01');

444	INSERT INTO dbo.Person (PersonID, LastName, FirstName, HireDate, EnrollmentDate)

445	VALUES (14, 'Walker', 'Alexandra', null, '2000-09-01');

446	INSERT INTO dbo.Person (PersonID, LastName, FirstName, HireDate, EnrollmentDate)

447	VALUES (15, 'Powell', 'Carson', null, '2004-09-01');

448	INSERT INTO dbo.Person (PersonID, LastName, FirstName, HireDate, EnrollmentDate)

449	VALUES (16, 'Jai', 'Damien', null, '2001-09-01');

450	INSERT INTO dbo.Person (PersonID, LastName, FirstName, HireDate, EnrollmentDate)

451	VALUES (17, 'Carlson', 'Robyn', null, '2005-09-01');

452	INSERT INTO dbo.Person (PersonID, LastName, FirstName, HireDate, EnrollmentDate)

453	VALUES (18, 'Zheng', 'Roger', '2004-02-12', null);

454	INSERT INTO dbo.Person (PersonID, LastName, FirstName, HireDate, EnrollmentDate)

455	VALUES (19, 'Bryant', 'Carson', null, '2001-09-01');

456	INSERT INTO dbo.Person (PersonID, LastName, FirstName, HireDate, EnrollmentDate)

457	VALUES (20, 'Suarez', 'Robyn', null, '2004-09-01');

458	INSERT INTO dbo.Person (PersonID, LastName, FirstName, HireDate, EnrollmentDate)

459	VALUES (21, 'Holt', 'Roger', null, '2004-09-01');

460	INSERT INTO dbo.Person (PersonID, LastName, FirstName, HireDate, EnrollmentDate)

461	VALUES (22, 'Alexander', 'Carson', null, '2005-09-01');

462	INSERT INTO dbo.Person (PersonID, LastName, FirstName, HireDate, EnrollmentDate)

463	VALUES (23, 'Morgan', 'Isaiah', null, '2001-09-01');

464	INSERT INTO dbo.Person (PersonID, LastName, FirstName, HireDate, EnrollmentDate)

465	VALUES (24, 'Martin', 'Randall', null, '2005-09-01');

466	INSERT INTO dbo.Person (PersonID, LastName, FirstName, HireDate, EnrollmentDate)

467	VALUES (25, 'Kapoor', 'Candace', '2001-01-15', null);

468	INSERT INTO dbo.Person (PersonID, LastName, FirstName, HireDate, EnrollmentDate)

469	VALUES (26, 'Rogers', 'Cody', null, '2002-09-01');

470	INSERT INTO dbo.Person (PersonID, LastName, FirstName, HireDate, EnrollmentDate)

471	VALUES (27, 'Serrano', 'Stacy', '1999-06-01', null);

472	INSERT INTO dbo.Person (PersonID, LastName, FirstName, HireDate, EnrollmentDate)

473	VALUES (28, 'White', 'Anthony', null, '2001-09-01');

474	INSERT INTO dbo.Person (PersonID, LastName, FirstName, HireDate, EnrollmentDate)

475	VALUES (29, 'Griffin', 'Rachel', null, '2004-09-01');

476	INSERT INTO dbo.Person (PersonID, LastName, FirstName, HireDate, EnrollmentDate)

477	VALUES (30, 'Shan', 'Alicia', null, '2003-09-01');

478	INSERT INTO dbo.Person (PersonID, LastName, FirstName, HireDate, EnrollmentDate)

479	VALUES (31, 'Stewart', 'Jasmine', '1997-10-12', null);

480	INSERT INTO dbo.Person (PersonID, LastName, FirstName, HireDate, EnrollmentDate)

481	VALUES (32, 'Xu', 'Kristen', '2001-7-23', null);

482	INSERT INTO dbo.Person (PersonID, LastName, FirstName, HireDate, EnrollmentDate)

483	VALUES (33, 'Gao', 'Erica', null, '2003-01-30');

484	INSERT INTO dbo.Person (PersonID, LastName, FirstName, HireDate, EnrollmentDate)

485	VALUES (34, 'Van Houten', 'Roger', '2000-12-07', null);

486

GO

487	SET IDENTITY_INSERT dbo.Person OFF

488

GO

489

490	-- Insert data into the Department table.

491	INSERT INTO dbo.Department (DepartmentID, [Name], Budget, StartDate, Administrator)

492	VALUES (1, 'Engineering', 350000.00, '2007-09-01', 2);

493	INSERT INTO dbo.Department (DepartmentID, [Name], Budget, StartDate, Administrator)

494	VALUES (2, 'English', 120000.00, '2007-09-01', 6);

495	INSERT INTO dbo.Department (DepartmentID, [Name], Budget, StartDate, Administrator)

496	VALUES (4, 'Economics', 200000.00, '2007-09-01', 4);

497	INSERT INTO dbo.Department (DepartmentID, [Name], Budget, StartDate, Administrator)

498	VALUES (7, 'Mathematics', 250000.00, '2007-09-01', 3);

499

GO

500

501

502	-- Insert data into the Course table.

503	INSERT INTO dbo.Course (CourseID, Title, Credits, DepartmentID)

504	VALUES (1050, 'Chemistry', 4, 1);

505	INSERT INTO dbo.Course (CourseID, Title, Credits, DepartmentID)

506	VALUES (1061, 'Physics', 4, 1);

507	INSERT INTO dbo.Course (CourseID, Title, Credits, DepartmentID)

508	VALUES (1045, 'Calculus', 4, 7);

509	INSERT INTO dbo.Course (CourseID, Title, Credits, DepartmentID)

510	VALUES (2030, 'Poetry', 2, 2);

511	INSERT INTO dbo.Course (CourseID, Title, Credits, DepartmentID)

512	VALUES (2021, 'Composition', 3, 2);

513	INSERT INTO dbo.Course (CourseID, Title, Credits, DepartmentID)

514	VALUES (2042, 'Literature', 4, 2);

515	INSERT INTO dbo.Course (CourseID, Title, Credits, DepartmentID)

516	VALUES (4022, 'Microeconomics', 3, 4);

517	INSERT INTO dbo.Course (CourseID, Title, Credits, DepartmentID)

518	VALUES (4041, 'Macroeconomics', 3, 4);

519	INSERT INTO dbo.Course (CourseID, Title, Credits, DepartmentID)

520	VALUES (4061, 'Quantitative', 2, 4);

521	INSERT INTO dbo.Course (CourseID, Title, Credits, DepartmentID)

522	VALUES (3141, 'Trigonometry', 4, 7);

523

GO

524

525	-- Insert data into the OnlineCourse table.

526	INSERT INTO dbo.OnlineCourse (CourseID, URL)

527	VALUES (2030, 'http://www.fineartschool.net/Poetry');

528	INSERT INTO dbo.OnlineCourse (CourseID, URL)

529	VALUES (2021, 'http://www.fineartschool.net/Composition');

530	INSERT INTO dbo.OnlineCourse (CourseID, URL)

531	VALUES (4041, 'http://www.fineartschool.net/Macroeconomics');

532	INSERT INTO dbo.OnlineCourse (CourseID, URL)

533	VALUES (3141, 'http://www.fineartschool.net/Trigonometry');

534

535	--Insert data into OnsiteCourse table.

536	INSERT INTO dbo.OnsiteCourse (CourseID, Location, Days, [Time])

537	VALUES (1050, '123 Smith', 'MTWH', '11:30');

538	INSERT INTO dbo.OnsiteCourse (CourseID, Location, Days, [Time])

539	VALUES (1061, '234 Smith', 'TWHF', '13:15');

540	INSERT INTO dbo.OnsiteCourse (CourseID, Location, Days, [Time])

541	VALUES (1045, '121 Smith','MWHF', '15:30');

542	INSERT INTO dbo.OnsiteCourse (CourseID, Location, Days, [Time])

543	VALUES (4061, '22 Williams', 'TH', '11:15');

544	INSERT INTO dbo.OnsiteCourse (CourseID, Location, Days, [Time])

545	VALUES (2042, '225 Adams', 'MTWH', '11:00');

546	INSERT INTO dbo.OnsiteCourse (CourseID, Location, Days, [Time])

547	VALUES (4022, '23 Williams', 'MWF', '9:00');

548

549	-- Insert data into the CourseInstructor table.

550	INSERT INTO dbo.CourseInstructor(CourseID, PersonID)

551	VALUES (1050, 1);

552	INSERT INTO dbo.CourseInstructor(CourseID, PersonID)

553	VALUES (1061, 31);

554	INSERT INTO dbo.CourseInstructor(CourseID, PersonID)

555	VALUES (1045, 5);

556	INSERT INTO dbo.CourseInstructor(CourseID, PersonID)

557	VALUES (2030, 4);

558	INSERT INTO dbo.CourseInstructor(CourseID, PersonID)

559	VALUES (2021, 27);

560	INSERT INTO dbo.CourseInstructor(CourseID, PersonID)

561	VALUES (2042, 25);

562	INSERT INTO dbo.CourseInstructor(CourseID, PersonID)

563	VALUES (4022, 18);

564	INSERT INTO dbo.CourseInstructor(CourseID, PersonID)

565	VALUES (4041, 32);

566	INSERT INTO dbo.CourseInstructor(CourseID, PersonID)

567	VALUES (4061, 34);

568

GO

569

570	--Insert data into the OfficeAssignment table.

571	INSERT INTO dbo.OfficeAssignment(InstructorID, Location)

572	VALUES (1, '17 Smith');

573	INSERT INTO dbo.OfficeAssignment(InstructorID, Location)

574	VALUES (4, '29 Adams');

575	INSERT INTO dbo.OfficeAssignment(InstructorID, Location)

576	VALUES (5, '37 Williams');

577	INSERT INTO dbo.OfficeAssignment(InstructorID, Location)

578	VALUES (18, '143 Smith');

579	INSERT INTO dbo.OfficeAssignment(InstructorID, Location)

580	VALUES (25, '57 Adams');

581	INSERT INTO dbo.OfficeAssignment(InstructorID, Location)

582	VALUES (27, '271 Williams');

583	INSERT INTO dbo.OfficeAssignment(InstructorID, Location)

584	VALUES (31, '131 Smith');

585	INSERT INTO dbo.OfficeAssignment(InstructorID, Location)

586	VALUES (32, '203 Williams');

587	INSERT INTO dbo.OfficeAssignment(InstructorID, Location)

588	VALUES (34, '213 Smith');

589

590	-- Insert data into the StudentGrade table.

591	INSERT INTO dbo.StudentGrade (CourseID, StudentID, Grade)

592	VALUES (2021, 2, 4);

593	INSERT INTO dbo.StudentGrade (CourseID, StudentID, Grade)

594	VALUES (2030, 2, 3.5);

595	INSERT INTO dbo.StudentGrade (CourseID, StudentID, Grade)

596	VALUES (2021, 3, 3);

597	INSERT INTO dbo.StudentGrade (CourseID, StudentID, Grade)

598	VALUES (2030, 3, 4);

599	INSERT INTO dbo.StudentGrade (CourseID, StudentID, Grade)

600	VALUES (2021, 6, 2.5);

601	INSERT INTO dbo.StudentGrade (CourseID, StudentID, Grade)

602	VALUES (2042, 6, 3.5);

603	INSERT INTO dbo.StudentGrade (CourseID, StudentID, Grade)

604	VALUES (2021, 7, 3.5);

605	INSERT INTO dbo.StudentGrade (CourseID, StudentID, Grade)

606	VALUES (2042, 7, 4);

607	INSERT INTO dbo.StudentGrade (CourseID, StudentID, Grade)

608	VALUES (2021, 8, 3);

609	INSERT INTO dbo.StudentGrade (CourseID, StudentID, Grade)

610	VALUES (2042, 8, 3);

611	INSERT INTO dbo.StudentGrade (CourseID, StudentID, Grade)

612	VALUES (4041, 9, 3.5);

613	INSERT INTO dbo.StudentGrade (CourseID, StudentID, Grade)

614	VALUES (4041, 10, null);

615	INSERT INTO dbo.StudentGrade (CourseID, StudentID, Grade)

616	VALUES (4041, 11, 2.5);

617	INSERT INTO dbo.StudentGrade (CourseID, StudentID, Grade)

618	VALUES (4041, 12, null);

619	INSERT INTO dbo.StudentGrade (CourseID, StudentID, Grade)

620	VALUES (4061, 12, null);

621	INSERT INTO dbo.StudentGrade (CourseID, StudentID, Grade)

622	VALUES (4022, 14, 3);

623	INSERT INTO dbo.StudentGrade (CourseID, StudentID, Grade)

624	VALUES (4022, 13, 4);

625	INSERT INTO dbo.StudentGrade (CourseID, StudentID, Grade)

626	VALUES (4061, 13, 4);

627	INSERT INTO dbo.StudentGrade (CourseID, StudentID, Grade)

628	VALUES (4041, 14, 3);

629	INSERT INTO dbo.StudentGrade (CourseID, StudentID, Grade)

630	VALUES (4022, 15, 2.5);

631	INSERT INTO dbo.StudentGrade (CourseID, StudentID, Grade)

632	VALUES (4022, 16, 2);

633	INSERT INTO dbo.StudentGrade (CourseID, StudentID, Grade)

634	VALUES (4022, 17, null);

635	INSERT INTO dbo.StudentGrade (CourseID, StudentID, Grade)

636	VALUES (4022, 19, 3.5);

637	INSERT INTO dbo.StudentGrade (CourseID, StudentID, Grade)

638	VALUES (4061, 20, 4);

639	INSERT INTO dbo.StudentGrade (CourseID, StudentID, Grade)

640	VALUES (4061, 21, 2);

641	INSERT INTO dbo.StudentGrade (CourseID, StudentID, Grade)

642	VALUES (4022, 22, 3);

643	INSERT INTO dbo.StudentGrade (CourseID, StudentID, Grade)

644	VALUES (4041, 22, 3.5);

645	INSERT INTO dbo.StudentGrade (CourseID, StudentID, Grade)

646	VALUES (4061, 22, 2.5);

647	INSERT INTO dbo.StudentGrade (CourseID, StudentID, Grade)

648	VALUES (4022, 23, 3);

649	INSERT INTO dbo.StudentGrade (CourseID, StudentID, Grade)

650	VALUES (1045, 23, 1.5);

651	INSERT INTO dbo.StudentGrade (CourseID, StudentID, Grade)

652	VALUES (1061, 24, 4);

653	INSERT INTO dbo.StudentGrade (CourseID, StudentID, Grade)

654	VALUES (1061, 25, 3);

655	INSERT INTO dbo.StudentGrade (CourseID, StudentID, Grade)

656	VALUES (1050, 26, 3.5);

657	INSERT INTO dbo.StudentGrade (CourseID, StudentID, Grade)

658	VALUES (1061, 26, 3);

659	INSERT INTO dbo.StudentGrade (CourseID, StudentID, Grade)

660	VALUES (1061, 27, 3);

661	INSERT INTO dbo.StudentGrade (CourseID, StudentID, Grade)

662	VALUES (1045, 28, 2.5);

663	INSERT INTO dbo.StudentGrade (CourseID, StudentID, Grade)

664	VALUES (1050, 28, 3.5);

665	INSERT INTO dbo.StudentGrade (CourseID, StudentID, Grade)

666	VALUES (1061, 29, 4);

667	INSERT INTO dbo.StudentGrade (CourseID, StudentID, Grade)

668	VALUES (1050, 30, 3.5);

669

670	INSERT INTO dbo.StudentGrade (CourseID, StudentID, Grade)

671	VALUES (1061, 30, 4);

672

GO

3：RIA之ADO.NET ENTITY DATA MODEL

为web创建ADO.NET ENTITY DATA MODEL，如图：

注意，习惯命名规则：Model数据库名.edmx。

在下一步中，我们选择刚才创建的数据库：

选择新建连接，按照指示完成数据库连接配置。

进入下一步：

在这一步中，注意一定要选择第一个红框中的内容，否则默认不能生成联表查询。在下一步中，我们选择“Generate from database”，如下：

点击Finish后，VS为我们生成了一个以edmx为后缀的文件。OK，到此暂停，我们先来看看这个edmx文件是干什么用的，为我们完成了什么工作。

3.1：什么是EDM

ENTITY DATA MODEL，简写为EDM，中文为实体数据模型。它由三个概念组成。概念模型由概念架构定义语言文件 (.csdl)来定义，映射由映射规范语言文件 (.msl)，存储模型（又称逻辑模型）由存储架构定义语言文件 (.ssdl)来定义。这三者合在一起就是EDM模型。EDM模型在项目中的表现形式就是扩展名为.edmx的文件。

Entity Framework实现了一套类似于ADO.NET2.0中的连接类来操作EDM完成持久化。EntityFramework中所有发往EDM的操作都是经过EntityClient，包括使用LINQ to Entity进行的操作。目前可用操作如下：

4：针对web EMD的测试

理解了EMD在开发中所处的作用，我们就可以针对EDM来写个测试项目。为了简便期间，我们直接在EMD中的SchoolEntities类型的构造方法中直接创建测试（严格意义来说，这不是个单元测试，这仅是测试）。

针对这个操作，会在测试项目中生成一个SchoolEntitiesTest的类型，同时，在这个类型中会生成一个SchoolEntitiesConstructorTest的方法，如下：

由于我们仅仅测试EDM，而跟WEB本身没有关系，所有我们注释掉了红框中的内容。同时我们写入真正的测试代码，如下：

这里的一个小细节是，连接字符串我们通过编码的方式传入到测试方法。EDM的连接字符串和ADO.NET的连接字符串有很大不同，在这里，可公开一下我们的生成EDM连接字符串的方法：

view sourceprint?

01	public string GetConnectionString()

02

{

03	string providerName = "System.Data.SqlClient";

04	string serverName = "192.168.0.96";

05	string databaseName = "mysample";

06	SqlConnectionStringBuilder sqlBuilder = new SqlConnectionStringBuilder();

07	sqlBuilder.DataSource = serverName;

08	sqlBuilder.InitialCatalog = databaseName;

09	sqlBuilder.IntegratedSecurity = false;

10	sqlBuilder.UserID = "sa";

11	sqlBuilder.Password = "sasa";

12	string providerString = sqlBuilder.ToString();

13	EntityConnectionStringBuilder entityBuilder = new EntityConnectionStringBuilder();

14	entityBuilder.Provider = providerName;

15	entityBuilder.ProviderConnectionString = providerString;

16	entityBuilder.Provider = providerName;

17	entityBuilder.Metadata = "res://*/Modelmysample.csdl|res://*/Modelmysample.ssdl|res://*/Modelmysample.msl";

18	return entityBuilder.ToString();

19

}

调试我们的测试代码，最终我们会获取到数据库中的4条记录。

通过了以上的阐述，我们了解了EDM的作用，以及如何测试EDM。接下来，我们需要知道如何在SL APP中调用WEB中的EDM。

5：Domain Service Class

在SL APP中调用EDM是通过WEB的Domain Service Class来实现的。简单的说来，它是RIA SERVICE框架中的一个重要内容。

在WEB选择添加新项，选择Domain Service Class，命名，下一步会出现如下界面：

我们可以做出如上勾选。确定后，编译整个解决方法，会发现目前的解决方案结构会变成如下形式：

注意，第一个红框部分，是VS自动为我们在SL APP生成的。它是第二个红框在客户端的对应版本。我们需要将它包含到项目中去。它包含了所有服务端版本类中定义的方法、实体等，而可在客户端直接调用。

6：Ria Service数据流转

好了，经过以上的描述我们知道了：

EDM：直接操作数据库；

Domain Service Class：调用EDM，并把数据接口通过WCF的形式开放给客户端；

*.Web.g.cs：调用Domain Service Class，完成对数据的读取，并最终呈现给UI；

7：最终展示

在SL APP中的UI调用呈现数据。前台：

后台，直接使用*.Web.g.cs中的DomainServiceMySample 加载数据：

view sourceprint?

public MainPage()

{

    InitializeComponent();

    DomainServiceMySample context = new DomainServiceMySample();

    context.Load(context.GetEmpQuery());

    lb1.ItemsSource = context.emps;

}

最后界面显示：

8：问题

该示例演示了使用Entity Framework和WCF Ria Services进行Silverlight开发。我们当然可以继续使用此模式完善功能，知道一个功能复杂的应用程序开发完毕。但是，当前，此示例起码存在如下几个问题。

1：实体模型被紧耦合在EDM中，同时它不能项目（模块）使用。随着每一次更新EDM，实体模型会被覆盖；

2：EDM和BLL紧耦合在一起；

3：没有提炼出数据接口，导致我们没有办法在此示例中进行单元测试。示例中虽然存在测试项目，但那是数据库相关的，达不到单元测试的要求；

下篇我们将继续重构该示例，以逐步解决这些问题。

本示例源码下载：SilverlightApplicationSchool20110612.zip