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

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

本文目的是通過Silverlight ria service完成一次數(shù)據(jù)的讀取過程，并且在此基礎(chǔ)上建立測(cè)試項(xiàng)目。

Ria service借助于WCF和ADO.NET Entity Framework構(gòu)建分布式開發(fā)框架。使用它可以快速構(gòu)建自己的開發(fā)模式。

1：基礎(chǔ)結(jié)構(gòu)

首先，創(chuàng)建SL APP，如下：

然后，選擇創(chuàng)建web：

可以，也可以不勾選enable wcf ria service，如果勾選了，在SL APP中會(huì)多幾個(gè)DLL的引用，其它沒有任何差別。如圖：

2：創(chuàng)建一個(gè)示例數(shù)據(jù)庫

這是一個(gè)小而輕型的數(shù)據(jù)庫，在MDSN的課程中有使用到它。如下：

show sourceview sourceprint?

001	SET ANSI_NULLS ON

002

003	SET QUOTED_IDENTIFIER ON

004

005

006	USE [master];

007

008

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

010	??? DROP DATABASE School;

011

012

013	-- Create the School database.

014	CREATE DATABASE School;

015

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

022

023	USE School;

024

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

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

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

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

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

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

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

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	??? 1742015336 [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

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

176	ALTER TABLE [dbo].[OnsiteCourse] CHECK

177	?????? CONSTRAINT [FK_OnsiteCourse_Course]

178

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

188	ALTER TABLE [dbo].[OnlineCourse] CHECK

189	?????? CONSTRAINT [FK_OnlineCourse_Course]

190

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

200	ALTER TABLE [dbo].[StudentGrade] CHECK

201	?????? CONSTRAINT [FK_StudentGrade_Course]

202

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

212	ALTER TABLE [dbo].[StudentGrade] CHECK

213	?????? CONSTRAINT [FK_StudentGrade_Student]

214

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

224	ALTER TABLE [dbo].[CourseInstructor] CHECK

225	?? CONSTRAINT [FK_CourseInstructor_Course]

226

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

236	ALTER TABLE [dbo].[CourseInstructor] CHECK

237	?? CONSTRAINT [FK_CourseInstructor_Person]

238

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

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

249

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

259	ALTER TABLE [dbo].[OfficeAssignment] CHECK

260	?? CONSTRAINT [FK_OfficeAssignment_Person]

261

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 1742015336 FROM OfficeAssignment

278	??????????????? WHERE InstructorID=@InstructorID;

279	??????? END

280

281

END

282

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 1742015336=@OrigTimestamp;

297	??????? IF @@ROWCOUNT > 0

298	??????? BEGIN

299	??????????? SELECT 1742015336 FROM OfficeAssignment

300	??????????????? WHERE InstructorID=@InstructorID;

301	??????? END

302

303

END

304

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

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

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

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

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

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

412

413	-- Insert data into the Person table.

414	USE School

415

416	SET IDENTITY_INSERT dbo.Person ON

417

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

487	SET IDENTITY_INSERT dbo.Person OFF

488

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

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

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

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

3：RIA之ADO.NET ENTITY DATA MODEL

為web創(chuàng)建ADO.NET ENTITY DATA MODEL，如圖：

注意，習(xí)慣命名規(guī)則：Model數(shù)據(jù)庫名.edmx。

在下一步中，我們選擇剛才創(chuàng)建的數(shù)據(jù)庫：

選擇新建連接，按照指示完成數(shù)據(jù)庫連接配置。

進(jìn)入下一步：

在這一步中，注意一定要選擇第一個(gè)紅框中的內(nèi)容，否則默認(rèn)不能生成聯(lián)表查詢。在下一步中，我們選擇“Generate from database”，如下：

點(diǎn)擊Finish后，VS為我們生成了一個(gè)以edmx為后綴的文件。OK，到此暫停，我們先來看看這個(gè)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(jiǎn)寫為EDM，中文為實(shí)體數(shù)據(jù)模型。它由三個(gè)概念組成。概念模型由概念架構(gòu)定義語言文件 (.csdl)來定義，映射由映射規(guī)范語言文件 (.msl)，存儲(chǔ)模型（又稱邏輯模型）由存儲(chǔ)架構(gòu)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(xiàng)目中的表現(xiàn)形式就是擴(kuò)展名為.edmx的文件。

Entity Framework實(shí)現(xiàn)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(fā)往EDM的操作都是經(jīng)過EntityClient，包括使用LINQ to Entity進(jìn)行的操作。目前可用操作如下：

4：針對(duì)web EMD的測(cè)試

理解了EMD在開發(fā)中所處的作用，我們就可以針對(duì)EDM來寫個(gè)測(cè)試項(xiàng)目。為了簡(jiǎn)便期間，我們直接在EMD中的SchoolEntities類型的構(gòu)造方法中直接創(chuàng)建測(cè)試（嚴(yán)格意義來說，這不是個(gè)單元測(cè)試，這僅是測(cè)試）。

針對(duì)這個(gè)操作，會(huì)在測(cè)試項(xiàng)目中生成一個(gè)SchoolEntitiesTest的類型，同時(shí)，在這個(gè)類型中會(huì)生成一個(gè)SchoolEntitiesConstructorTest的方法，如下：

由于我們僅僅測(cè)試EDM，而跟WEB本身沒有關(guān)系，所有我們注釋掉了紅框中的內(nèi)容。同時(shí)我們寫入真正的測(cè)試代碼，如下：

這里的一個(gè)小細(xì)節(jié)是，連接字符串我們通過編碼的方式傳入到測(cè)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：

view sourceprint?

01	public string GetConnectionString()

{

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();

}

調(diào)試我們的測(cè)試代碼，最終我們會(huì)獲取到數(shù)據(jù)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(cè)試EDM。接下來，我們需要知道如何在SL APP中調(diào)用WEB中的EDM。

5：Domain Service Class

在SL APP中調(diào)用EDM是通過WEB的Domain Service Class來實(shí)現(xiàn)的。簡(jiǎn)單的說來，它是RIA SERVICE框架中的一個(gè)重要內(nèi)容。

在WEB選擇添加新項(xiàng)，選擇Domain Service Class，命名，下一步會(huì)出現(xiàn)如下界面：

我們可以做出如上勾選。確定后，編譯整個(gè)解決方法，會(huì)發(fā)現(xiàn)目前的解決方案結(jié)構(gòu)會(huì)變成如下形式：

注意，第一個(gè)紅框部分，是VS自動(dòng)為我們?cè)赟L APP生成的。它是第二個(gè)紅框在客戶端的對(duì)應(yīng)版本。我們需要將它包含到項(xiàng)目中去。它包含了所有服務(wù)端版本類中定義的方法、實(shí)體等，而可在客戶端直接調(diào)用。

6：Ria Service數(shù)據(jù)流轉(zhuǎn)

好了，經(jīng)過以上的描述我們知道了：

EDM：直接操作數(shù)據(jù)庫；

Domain Service Class：調(diào)用EDM，并把數(shù)據(jù)接口通過WCF的形式開放給客戶端；

*.Web.g.cs：調(diào)用Domain Service Class，完成對(duì)數(shù)據(jù)的讀取，并最終呈現(xiàn)給UI；

7：最終展示

在SL APP中的UI調(diào)用呈現(xiàn)數(shù)據(jù)。前臺(tái)：

后臺(tái)，直接使用*.Web.g.cs中的DomainServiceMySample 加載數(shù)據(jù)：

view sourceprint?

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(jìn)行Silverlight開發(fā)。我們當(dāng)然可以繼續(xù)使用此模式完善功能，知道一個(gè)功能復(fù)雜的應(yīng)用程序開發(fā)完畢。但是，當(dāng)前，此示例起碼存在如下幾個(gè)問題。

1：實(shí)體模型被緊耦合在EDM中，同時(shí)它不能項(xiàng)目（模塊）使用。隨著每一次更新EDM，實(shí)體模型會(huì)被覆蓋；

2：EDM和BLL緊耦合在一起；

3：沒有提煉出數(shù)據(jù)接口，導(dǎo)致我們沒有辦法在此示例中進(jìn)行單元測(cè)試。示例中雖然存在測(cè)試項(xiàng)目，但那是數(shù)據(jù)庫相關(guān)的，達(dá)不到單元測(cè)試的要求；

下篇我們將繼續(xù)重構(gòu)該示例，以逐步解決這些問題。

本示例源碼下載：SilverlightApplicationSchool20110612.zip

轉(zhuǎn)載于:https://www.cnblogs.com/fcsh820/archive/2011/07/02/2096177.html

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