（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：

001SET ANSI_NULLS ON
002GO
003SET QUOTED_IDENTIFIER ON
004GO
005 
006USE [master];
007GO
008 
009IF EXISTS (SELECT * FROM sys.databases WHERE name = 'School')
010    DROP DATABASE School;
011GO
012 
013-- Create the School database.
014CREATE DATABASE School;
015GO
016 
017-- Specify a simple recovery model 
018-- to keep the log growth to a minimum.
019ALTER DATABASE School 
020    SET RECOVERY SIMPLE;
021GO
022 
023USE School;
024GO
025 
026-- Create the Department table.
027IF NOT EXISTS (SELECT * FROM sys.objects 
028        WHERE object_id = OBJECT_ID(N'[dbo].[Department]') 
029        AND type in (N'U'))
030BEGIN
031CREATE 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]
042END
043GO
044 
045-- Create the Person table.
046IF NOT EXISTS (SELECT * FROM sys.objects 
047        WHERE object_id = OBJECT_ID(N'[dbo].[Person]') 
048        AND type in (N'U'))
049BEGIN
050CREATE 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]
061END
062GO
063 
064-- Create the OnsiteCourse table.
065IF NOT EXISTS (SELECT * FROM sys.objects 
066        WHERE object_id = OBJECT_ID(N'[dbo].[OnsiteCourse]') 
067        AND type in (N'U'))
068BEGIN
069CREATE 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]
079END
080GO
081 
082-- Create the OnlineCourse table.
083IF NOT EXISTS (SELECT * FROM sys.objects 
084        WHERE object_id = OBJECT_ID(N'[dbo].[OnlineCourse]') 
085        AND type in (N'U'))
086BEGIN
087CREATE 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]
095END
096GO
097 
098--Create the StudentGrade table.
099IF NOT EXISTS (SELECT * FROM sys.objects 
100        WHERE object_id = OBJECT_ID(N'[dbo].[StudentGrade]') 
101        AND type in (N'U'))
102BEGIN
103CREATE 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]
113END
114GO
115 
116-- Create the CourseInstructor table.
117IF NOT EXISTS (SELECT * FROM sys.objects 
118        WHERE object_id = OBJECT_ID(N'[dbo].[CourseInstructor]') 
119        AND type in (N'U'))
120BEGIN
121CREATE 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]
130END
131GO
132 
133-- Create the Course table.
134IF NOT EXISTS (SELECT * FROM sys.objects 
135        WHERE object_id = OBJECT_ID(N'[dbo].[Course]') 
136        AND type in (N'U'))
137BEGIN
138CREATE 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]
148END
149GO
150 
151-- Create the OfficeAssignment table.
152IF NOT EXISTS (SELECT * FROM sys.objects 
153        WHERE object_id = OBJECT_ID(N'[dbo].[OfficeAssignment]')
154        AND type in (N'U'))
155BEGIN
156CREATE 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]
165END
166GO
167 
168-- Define the relationship between OnsiteCourse and Course.
169IF 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]'))
172ALTER TABLE [dbo].[OnsiteCourse]  WITH CHECK ADD 
173       CONSTRAINT [FK_OnsiteCourse_Course] FOREIGN KEY([CourseID])
174REFERENCES [dbo].[Course] ([CourseID])
175GO
176ALTER TABLE [dbo].[OnsiteCourse] CHECK
177       CONSTRAINT [FK_OnsiteCourse_Course]
178GO
179 
180-- Define the relationship between OnlineCourse and Course.
181IF 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]'))
184ALTER TABLE [dbo].[OnlineCourse]  WITH CHECK ADD 
185       CONSTRAINT [FK_OnlineCourse_Course] FOREIGN KEY([CourseID])
186REFERENCES [dbo].[Course] ([CourseID])
187GO
188ALTER TABLE [dbo].[OnlineCourse] CHECK
189       CONSTRAINT [FK_OnlineCourse_Course]
190GO
191 
192-- Define the relationship between StudentGrade and Course.
193IF 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]'))
196ALTER TABLE [dbo].[StudentGrade]  WITH CHECK ADD 
197       CONSTRAINT [FK_StudentGrade_Course] FOREIGN KEY([CourseID])
198REFERENCES [dbo].[Course] ([CourseID])
199GO
200ALTER TABLE [dbo].[StudentGrade] CHECK
201       CONSTRAINT [FK_StudentGrade_Course]
202GO
203 
204--Define the relationship between StudentGrade and Student.
205IF 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]'))
208ALTER TABLE [dbo].[StudentGrade]  WITH CHECK ADD 
209       CONSTRAINT [FK_StudentGrade_Student] FOREIGN KEY([StudentID])
210REFERENCES [dbo].[Person] ([PersonID])
211GO
212ALTER TABLE [dbo].[StudentGrade] CHECK
213       CONSTRAINT [FK_StudentGrade_Student]
214GO
215 
216-- Define the relationship between CourseInstructor and Course.
217IF 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]'))
220ALTER TABLE [dbo].[CourseInstructor]  WITH CHECK ADD 
221   CONSTRAINT [FK_CourseInstructor_Course] FOREIGN KEY([CourseID])
222REFERENCES [dbo].[Course] ([CourseID])
223GO
224ALTER TABLE [dbo].[CourseInstructor] CHECK
225   CONSTRAINT [FK_CourseInstructor_Course]
226GO
227 
228-- Define the relationship between CourseInstructor and Person.
229IF 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]'))
232ALTER TABLE [dbo].[CourseInstructor]  WITH CHECK ADD 
233   CONSTRAINT [FK_CourseInstructor_Person] FOREIGN KEY([PersonID])
234REFERENCES [dbo].[Person] ([PersonID])
235GO
236ALTER TABLE [dbo].[CourseInstructor] CHECK
237   CONSTRAINT [FK_CourseInstructor_Person]
238GO
239 
240-- Define the relationship between Course and Department.
241IF 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]'))
244ALTER TABLE [dbo].[Course]  WITH CHECK ADD 
245       CONSTRAINT [FK_Course_Department] FOREIGN KEY([DepartmentID])
246REFERENCES [dbo].[Department] ([DepartmentID])
247GO
248ALTER TABLE [dbo].[Course] CHECK CONSTRAINT [FK_Course_Department]
249GO
250 
251--Define the relationship between OfficeAssignment and Person.
252IF 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]'))
255ALTER TABLE [dbo].[OfficeAssignment]  WITH CHECK ADD 
256   CONSTRAINT [FK_OfficeAssignment_Person] FOREIGN KEY([InstructorID])
257REFERENCES [dbo].[Person] ([PersonID])
258GO
259ALTER TABLE [dbo].[OfficeAssignment] CHECK
260   CONSTRAINT [FK_OfficeAssignment_Person]
261GO
262 
263-- Create InsertOfficeAssignment stored procedure.
264IF NOT EXISTS (SELECT * FROM sys.objects 
265        WHERE object_id = OBJECT_ID(N'[dbo].[InsertOfficeAssignment]') 
266        AND type in (N'P', N'PC'))
267BEGIN
268EXEC dbo.sp_executesql @statement = N'
269CREATE 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'
281END
282GO
283 
284--Create the UpdateOfficeAssignment stored procedure.
285IF NOT EXISTS (SELECT * FROM sys.objects 
286        WHERE object_id = OBJECT_ID(N'[dbo].[UpdateOfficeAssignment]') 
287        AND type in (N'P', N'PC'))
288BEGIN
289EXEC dbo.sp_executesql @statement = N'
290CREATE 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'
303END
304GO
305 
306-- Create the DeleteOfficeAssignment stored procedure.
307IF NOT EXISTS (SELECT * FROM sys.objects 
308        WHERE object_id = OBJECT_ID(N'[dbo].[DeleteOfficeAssignment]') 
309        AND type in (N'P', N'PC'))
310BEGIN
311EXEC dbo.sp_executesql @statement = N'
312CREATE PROCEDURE [dbo].[DeleteOfficeAssignment]
313        @InstructorID int
314        AS
315        DELETE FROM OfficeAssignment
316        WHERE InstructorID=@InstructorID;
317'
318END
319GO
320 
321-- Create the DeletePerson stored procedure.
322IF NOT EXISTS (SELECT * FROM sys.objects 
323        WHERE object_id = OBJECT_ID(N'[dbo].[DeletePerson]') 
324        AND type in (N'P', N'PC'))
325BEGIN
326EXEC dbo.sp_executesql @statement = N'
327CREATE PROCEDURE [dbo].[DeletePerson]
328        @PersonID int
329        AS
330        DELETE FROM Person WHERE PersonID = @PersonID;
331'
332END
333GO
334 
335-- Create the UpdatePerson stored procedure.
336IF NOT EXISTS (SELECT * FROM sys.objects 
337        WHERE object_id = OBJECT_ID(N'[dbo].[UpdatePerson]') 
338        AND type in (N'P', N'PC'))
339BEGIN
340EXEC dbo.sp_executesql @statement = N'
341CREATE 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'
354END
355GO
356 
357-- Create the InsertPerson stored procedure.
358IF NOT EXISTS (SELECT * FROM sys.objects 
359        WHERE object_id = OBJECT_ID(N'[dbo].[InsertPerson]') 
360        AND type in (N'P', N'PC'))
361BEGIN
362EXEC dbo.sp_executesql @statement = N'
363CREATE 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'
379END
380GO
381 
382-- Create GetStudentGrades stored procedure.
383IF NOT EXISTS (SELECT * FROM sys.objects 
384            WHERE object_id = OBJECT_ID(N'[dbo].[GetStudentGrades]') 
385            AND type in (N'P', N'PC'))
386BEGIN
387EXEC dbo.sp_executesql @statement = N'
388CREATE PROCEDURE [dbo].[GetStudentGrades]
389            @StudentID int
390            AS
391            SELECT EnrollmentID, Grade, CourseID, StudentID FROM dbo.StudentGrade
392            WHERE StudentID = @StudentID
393'
394END
395GO
396 
397-- Create GetDepartmentName stored procedure.
398IF NOT EXISTS (SELECT * FROM sys.objects 
399            WHERE object_id = OBJECT_ID(N'[dbo].[GetDepartmentName]') 
400            AND type in (N'P', N'PC'))
401BEGIN
402EXEC dbo.sp_executesql @statement = N'
403CREATE PROCEDURE [dbo].[GetDepartmentName]
404      @ID int,
405      @Name nvarchar(50) OUTPUT
406      AS
407      SELECT @Name = Name FROM Department
408      WHERE DepartmentID = @ID
409'
410END
411GO
412 
413-- Insert data into the Person table.
414USE School
415GO
416SET IDENTITY_INSERT dbo.Person ON
417GO
418INSERT INTO dbo.Person (PersonID, LastName, FirstName, HireDate, EnrollmentDate)
419VALUES (1, 'Abercrombie', 'Kim', '1995-03-11', null);
420INSERT INTO dbo.Person (PersonID, LastName, FirstName, HireDate, EnrollmentDate)
421VALUES (2, 'Barzdukas', 'Gytis', null, '2005-09-01');
422INSERT INTO dbo.Person (PersonID, LastName, FirstName, HireDate, EnrollmentDate)
423VALUES (3, 'Justice', 'Peggy', null, '2001-09-01');
424INSERT INTO dbo.Person (PersonID, LastName, FirstName, HireDate, EnrollmentDate)
425VALUES (4, 'Fakhouri', 'Fadi', '2002-08-06', null);
426INSERT INTO dbo.Person (PersonID, LastName, FirstName, HireDate, EnrollmentDate)
427VALUES (5, 'Harui', 'Roger', '1998-07-01', null);
428INSERT INTO dbo.Person (PersonID, LastName, FirstName, HireDate, EnrollmentDate)
429VALUES (6, 'Li', 'Yan', null, '2002-09-01');
430INSERT INTO dbo.Person (PersonID, LastName, FirstName, HireDate, EnrollmentDate)
431VALUES (7, 'Norman', 'Laura', null, '2003-09-01');
432INSERT INTO dbo.Person (PersonID, LastName, FirstName, HireDate, EnrollmentDate)
433VALUES (8, 'Olivotto', 'Nino', null, '2005-09-01');
434INSERT INTO dbo.Person (PersonID, LastName, FirstName, HireDate, EnrollmentDate)
435VALUES (9, 'Tang', 'Wayne', null, '2005-09-01');
436INSERT INTO dbo.Person (PersonID, LastName, FirstName, HireDate, EnrollmentDate)
437VALUES (10, 'Alonso', 'Meredith', null, '2002-09-01');
438INSERT INTO dbo.Person (PersonID, LastName, FirstName, HireDate, EnrollmentDate)
439VALUES (11, 'Lopez', 'Sophia', null, '2004-09-01');
440INSERT INTO dbo.Person (PersonID, LastName, FirstName, HireDate, EnrollmentDate)
441VALUES (12, 'Browning', 'Meredith', null, '2000-09-01');
442INSERT INTO dbo.Person (PersonID, LastName, FirstName, HireDate, EnrollmentDate)
443VALUES (13, 'Anand', 'Arturo', null, '2003-09-01');
444INSERT INTO dbo.Person (PersonID, LastName, FirstName, HireDate, EnrollmentDate)
445VALUES (14, 'Walker', 'Alexandra', null, '2000-09-01');
446INSERT INTO dbo.Person (PersonID, LastName, FirstName, HireDate, EnrollmentDate)
447VALUES (15, 'Powell', 'Carson', null, '2004-09-01');
448INSERT INTO dbo.Person (PersonID, LastName, FirstName, HireDate, EnrollmentDate)
449VALUES (16, 'Jai', 'Damien', null, '2001-09-01');
450INSERT INTO dbo.Person (PersonID, LastName, FirstName, HireDate, EnrollmentDate)
451VALUES (17, 'Carlson', 'Robyn', null, '2005-09-01');
452INSERT INTO dbo.Person (PersonID, LastName, FirstName, HireDate, EnrollmentDate)
453VALUES (18, 'Zheng', 'Roger', '2004-02-12', null);
454INSERT INTO dbo.Person (PersonID, LastName, FirstName, HireDate, EnrollmentDate)
455VALUES (19, 'Bryant', 'Carson', null, '2001-09-01');
456INSERT INTO dbo.Person (PersonID, LastName, FirstName, HireDate, EnrollmentDate)
457VALUES (20, 'Suarez', 'Robyn', null, '2004-09-01');
458INSERT INTO dbo.Person (PersonID, LastName, FirstName, HireDate, EnrollmentDate)
459VALUES (21, 'Holt', 'Roger', null, '2004-09-01');
460INSERT INTO dbo.Person (PersonID, LastName, FirstName, HireDate, EnrollmentDate)
461VALUES (22, 'Alexander', 'Carson', null, '2005-09-01');
462INSERT INTO dbo.Person (PersonID, LastName, FirstName, HireDate, EnrollmentDate)
463VALUES (23, 'Morgan', 'Isaiah', null, '2001-09-01');
464INSERT INTO dbo.Person (PersonID, LastName, FirstName, HireDate, EnrollmentDate)
465VALUES (24, 'Martin', 'Randall', null, '2005-09-01');
466INSERT INTO dbo.Person (PersonID, LastName, FirstName, HireDate, EnrollmentDate)
467VALUES (25, 'Kapoor', 'Candace', '2001-01-15', null);
468INSERT INTO dbo.Person (PersonID, LastName, FirstName, HireDate, EnrollmentDate)
469VALUES (26, 'Rogers', 'Cody', null, '2002-09-01');
470INSERT INTO dbo.Person (PersonID, LastName, FirstName, HireDate, EnrollmentDate)
471VALUES (27, 'Serrano', 'Stacy', '1999-06-01', null);
472INSERT INTO dbo.Person (PersonID, LastName, FirstName, HireDate, EnrollmentDate)
473VALUES (28, 'White', 'Anthony', null, '2001-09-01');
474INSERT INTO dbo.Person (PersonID, LastName, FirstName, HireDate, EnrollmentDate)
475VALUES (29, 'Griffin', 'Rachel', null, '2004-09-01');
476INSERT INTO dbo.Person (PersonID, LastName, FirstName, HireDate, EnrollmentDate)
477VALUES (30, 'Shan', 'Alicia', null, '2003-09-01');
478INSERT INTO dbo.Person (PersonID, LastName, FirstName, HireDate, EnrollmentDate)
479VALUES (31, 'Stewart', 'Jasmine', '1997-10-12', null);
480INSERT INTO dbo.Person (PersonID, LastName, FirstName, HireDate, EnrollmentDate)
481VALUES (32, 'Xu', 'Kristen', '2001-7-23', null);
482INSERT INTO dbo.Person (PersonID, LastName, FirstName, HireDate, EnrollmentDate)
483VALUES (33, 'Gao', 'Erica', null, '2003-01-30');
484INSERT INTO dbo.Person (PersonID, LastName, FirstName, HireDate, EnrollmentDate)
485VALUES (34, 'Van Houten', 'Roger', '2000-12-07', null);
486GO
487SET IDENTITY_INSERT dbo.Person OFF
488GO
489 
490-- Insert data into the Department table.
491INSERT INTO dbo.Department (DepartmentID, [Name], Budget, StartDate, Administrator)
492VALUES (1, 'Engineering', 350000.00, '2007-09-01', 2);
493INSERT INTO dbo.Department (DepartmentID, [Name], Budget, StartDate, Administrator)
494VALUES (2, 'English', 120000.00, '2007-09-01', 6);
495INSERT INTO dbo.Department (DepartmentID, [Name], Budget, StartDate, Administrator)
496VALUES (4, 'Economics', 200000.00, '2007-09-01', 4);
497INSERT INTO dbo.Department (DepartmentID, [Name], Budget, StartDate, Administrator)
498VALUES (7, 'Mathematics', 250000.00, '2007-09-01', 3);
499GO
500 
501 
502-- Insert data into the Course table.
503INSERT INTO dbo.Course (CourseID, Title, Credits, DepartmentID)
504VALUES (1050, 'Chemistry', 4, 1);
505INSERT INTO dbo.Course (CourseID, Title, Credits, DepartmentID)
506VALUES (1061, 'Physics', 4, 1);
507INSERT INTO dbo.Course (CourseID, Title, Credits, DepartmentID)
508VALUES (1045, 'Calculus', 4, 7);
509INSERT INTO dbo.Course (CourseID, Title, Credits, DepartmentID)
510VALUES (2030, 'Poetry', 2, 2);
511INSERT INTO dbo.Course (CourseID, Title, Credits, DepartmentID)
512VALUES (2021, 'Composition', 3, 2);
513INSERT INTO dbo.Course (CourseID, Title, Credits, DepartmentID)
514VALUES (2042, 'Literature', 4, 2);
515INSERT INTO dbo.Course (CourseID, Title, Credits, DepartmentID)
516VALUES (4022, 'Microeconomics', 3, 4);
517INSERT INTO dbo.Course (CourseID, Title, Credits, DepartmentID)
518VALUES (4041, 'Macroeconomics', 3, 4);
519INSERT INTO dbo.Course (CourseID, Title, Credits, DepartmentID)
520VALUES (4061, 'Quantitative', 2, 4);
521INSERT INTO dbo.Course (CourseID, Title, Credits, DepartmentID)
522VALUES (3141, 'Trigonometry', 4, 7);
523GO
524 
525-- Insert data into the OnlineCourse table.
526INSERT INTO dbo.OnlineCourse (CourseID, URL)
527VALUES (2030, 'http://www.fineartschool.net/Poetry');
528INSERT INTO dbo.OnlineCourse (CourseID, URL)
529VALUES (2021, 'http://www.fineartschool.net/Composition');
530INSERT INTO dbo.OnlineCourse (CourseID, URL)
531VALUES (4041, 'http://www.fineartschool.net/Macroeconomics');
532INSERT INTO dbo.OnlineCourse (CourseID, URL)
533VALUES (3141, 'http://www.fineartschool.net/Trigonometry');
534 
535--Insert data into OnsiteCourse table.
536INSERT INTO dbo.OnsiteCourse (CourseID, Location, Days, [Time])
537VALUES (1050, '123 Smith', 'MTWH', '11:30');
538INSERT INTO dbo.OnsiteCourse (CourseID, Location, Days, [Time])
539VALUES (1061, '234 Smith', 'TWHF', '13:15');
540INSERT INTO dbo.OnsiteCourse (CourseID, Location, Days, [Time])
541VALUES (1045, '121 Smith','MWHF', '15:30');
542INSERT INTO dbo.OnsiteCourse (CourseID, Location, Days, [Time])
543VALUES (4061, '22 Williams', 'TH', '11:15');
544INSERT INTO dbo.OnsiteCourse (CourseID, Location, Days, [Time])
545VALUES (2042, '225 Adams', 'MTWH', '11:00');
546INSERT INTO dbo.OnsiteCourse (CourseID, Location, Days, [Time])
547VALUES (4022, '23 Williams', 'MWF', '9:00');
548 
549-- Insert data into the CourseInstructor table.
550INSERT INTO dbo.CourseInstructor(CourseID, PersonID)
551VALUES (1050, 1);
552INSERT INTO dbo.CourseInstructor(CourseID, PersonID)
553VALUES (1061, 31);
554INSERT INTO dbo.CourseInstructor(CourseID, PersonID)
555VALUES (1045, 5);
556INSERT INTO dbo.CourseInstructor(CourseID, PersonID)
557VALUES (2030, 4);
558INSERT INTO dbo.CourseInstructor(CourseID, PersonID)
559VALUES (2021, 27);
560INSERT INTO dbo.CourseInstructor(CourseID, PersonID)
561VALUES (2042, 25);
562INSERT INTO dbo.CourseInstructor(CourseID, PersonID)
563VALUES (4022, 18);
564INSERT INTO dbo.CourseInstructor(CourseID, PersonID)
565VALUES (4041, 32);
566INSERT INTO dbo.CourseInstructor(CourseID, PersonID)
567VALUES (4061, 34);
568GO
569 
570--Insert data into the OfficeAssignment table.
571INSERT INTO dbo.OfficeAssignment(InstructorID, Location)
572VALUES (1, '17 Smith');
573INSERT INTO dbo.OfficeAssignment(InstructorID, Location)
574VALUES (4, '29 Adams');
575INSERT INTO dbo.OfficeAssignment(InstructorID, Location)
576VALUES (5, '37 Williams');
577INSERT INTO dbo.OfficeAssignment(InstructorID, Location)
578VALUES (18, '143 Smith');
579INSERT INTO dbo.OfficeAssignment(InstructorID, Location)
580VALUES (25, '57 Adams');
581INSERT INTO dbo.OfficeAssignment(InstructorID, Location)
582VALUES (27, '271 Williams');
583INSERT INTO dbo.OfficeAssignment(InstructorID, Location)
584VALUES (31, '131 Smith');
585INSERT INTO dbo.OfficeAssignment(InstructorID, Location)
586VALUES (32, '203 Williams');
587INSERT INTO dbo.OfficeAssignment(InstructorID, Location)
588VALUES (34, '213 Smith');
589 
590-- Insert data into the StudentGrade table.
591INSERT INTO dbo.StudentGrade (CourseID, StudentID, Grade)
592VALUES (2021, 2, 4);
593INSERT INTO dbo.StudentGrade (CourseID, StudentID, Grade)
594VALUES (2030, 2, 3.5);
595INSERT INTO dbo.StudentGrade (CourseID, StudentID, Grade)
596VALUES (2021, 3, 3);
597INSERT INTO dbo.StudentGrade (CourseID, StudentID, Grade)
598VALUES (2030, 3, 4);
599INSERT INTO dbo.StudentGrade (CourseID, StudentID, Grade)
600VALUES (2021, 6, 2.5);
601INSERT INTO dbo.StudentGrade (CourseID, StudentID, Grade)
602VALUES (2042, 6, 3.5);
603INSERT INTO dbo.StudentGrade (CourseID, StudentID, Grade)
604VALUES (2021, 7, 3.5);
605INSERT INTO dbo.StudentGrade (CourseID, StudentID, Grade)
606VALUES (2042, 7, 4);
607INSERT INTO dbo.StudentGrade (CourseID, StudentID, Grade)
608VALUES (2021, 8, 3);
609INSERT INTO dbo.StudentGrade (CourseID, StudentID, Grade)
610VALUES (2042, 8, 3);
611INSERT INTO dbo.StudentGrade (CourseID, StudentID, Grade)
612VALUES (4041, 9, 3.5);
613INSERT INTO dbo.StudentGrade (CourseID, StudentID, Grade)
614VALUES (4041, 10, null);
615INSERT INTO dbo.StudentGrade (CourseID, StudentID, Grade)
616VALUES (4041, 11, 2.5);
617INSERT INTO dbo.StudentGrade (CourseID, StudentID, Grade)
618VALUES (4041, 12, null);
619INSERT INTO dbo.StudentGrade (CourseID, StudentID, Grade)
620VALUES (4061, 12, null);
621INSERT INTO dbo.StudentGrade (CourseID, StudentID, Grade)
622VALUES (4022, 14, 3);
623INSERT INTO dbo.StudentGrade (CourseID, StudentID, Grade)
624VALUES (4022, 13, 4);
625INSERT INTO dbo.StudentGrade (CourseID, StudentID, Grade)
626VALUES (4061, 13, 4);
627INSERT INTO dbo.StudentGrade (CourseID, StudentID, Grade)
628VALUES (4041, 14, 3);
629INSERT INTO dbo.StudentGrade (CourseID, StudentID, Grade)
630VALUES (4022, 15, 2.5);
631INSERT INTO dbo.StudentGrade (CourseID, StudentID, Grade)
632VALUES (4022, 16, 2);
633INSERT INTO dbo.StudentGrade (CourseID, StudentID, Grade)
634VALUES (4022, 17, null);
635INSERT INTO dbo.StudentGrade (CourseID, StudentID, Grade)
636VALUES (4022, 19, 3.5);
637INSERT INTO dbo.StudentGrade (CourseID, StudentID, Grade)
638VALUES (4061, 20, 4);
639INSERT INTO dbo.StudentGrade (CourseID, StudentID, Grade)
640VALUES (4061, 21, 2);
641INSERT INTO dbo.StudentGrade (CourseID, StudentID, Grade)
642VALUES (4022, 22, 3);
643INSERT INTO dbo.StudentGrade (CourseID, StudentID, Grade)
644VALUES (4041, 22, 3.5);
645INSERT INTO dbo.StudentGrade (CourseID, StudentID, Grade)
646VALUES (4061, 22, 2.5);
647INSERT INTO dbo.StudentGrade (CourseID, StudentID, Grade)
648VALUES (4022, 23, 3);
649INSERT INTO dbo.StudentGrade (CourseID, StudentID, Grade)
650VALUES (1045, 23, 1.5);
651INSERT INTO dbo.StudentGrade (CourseID, StudentID, Grade)
652VALUES (1061, 24, 4);
653INSERT INTO dbo.StudentGrade (CourseID, StudentID, Grade)
654VALUES (1061, 25, 3);
655INSERT INTO dbo.StudentGrade (CourseID, StudentID, Grade)
656VALUES (1050, 26, 3.5);
657INSERT INTO dbo.StudentGrade (CourseID, StudentID, Grade)
658VALUES (1061, 26, 3);
659INSERT INTO dbo.StudentGrade (CourseID, StudentID, Grade)
660VALUES (1061, 27, 3);
661INSERT INTO dbo.StudentGrade (CourseID, StudentID, Grade)
662VALUES (1045, 28, 2.5);
663INSERT INTO dbo.StudentGrade (CourseID, StudentID, Grade)
664VALUES (1050, 28, 3.5);
665INSERT INTO dbo.StudentGrade (CourseID, StudentID, Grade)
666VALUES (1061, 29, 4);
667INSERT INTO dbo.StudentGrade (CourseID, StudentID, Grade)
668VALUES (1050, 30, 3.5);
669 
670INSERT INTO dbo.StudentGrade (CourseID, StudentID, Grade)
671VALUES (1061, 30, 4);
672GO

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：

01public 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：

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