（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

转载于:https://www.cnblogs.com/fcsh820/archive/2011/07/02/2096177.html

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

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