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When the WCF RIA Services link is established, any domain services created in the TestWeb web application are made available within the Silverlight project via the code-generation functionality built into the WCF RIA Services framework. Figure 9-9 shows the Solution Explorer tool window for Recipe 9-4 with hidden files and folders displayed and all folders expanded.

With hidden folders displayed, you see a folder named Generated_Code with a generated code file named TestWeb.g.cs. This code file is brought in via WCF RIA Services code generation and is linked to the TestWeb web project, which is also where the file gets its default name of TestWeb.g.cs. The contents are auto-generated, not doing much more than establishing the WebContext, which makes web application services such as authentication, authorization, etc. available in a Silverlight application Now, shift gears to the middle tier and leave your Silverlight application ready to receive the automatically generated client-side code. You will create an Entity Framework data model that contains all of the available entities and then create a Domain Service to access it. First, create two folders named DataModel and DomainService to hold the Entity Framework model and Domain Services, respectively. Right-click on the data model folder and select Add New Item to bring up the project items dialog. Click Data on the left to filter the project items available and select ADO.NET Entity Data Model. Name it Northwind.edmx and click Add to bring up the Entity Data Model Wizard. Select Generate from database and click Next. Click New Connection to create a new database connect to the Northwind database or select an existing connection if present. Note that the connection string is saved to the Web.config file so you can edit this file as the project is moved between a development, test, and production environment. In the Choose your Database Objects page of the wizard, select all tables, and click Finish, accepting the defaults. This results in the model shown in Figure 9-10.

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ZUML. In Listing 6-11, a captcha component is used to dynamically generate distorted text; it takes the following attributes:

Note The ADO.NET Entity Framework is a very powerful object to relational modeling tool. For more

This is certainly not, by any stretch of the imagination, the ideal set of rules for sorting resumes. I d much rather be able to sort resumes by the candidate s ability to implement a recursive algorithm, how long it takes them to find a bug in code, or whether or not they can keep nine items in short-term memory, all of which are better indicators of success as programmers than things like whether you got past an elite college s admissions committee. Unfortunately, those things aren t on resumes. One temptation of recruiters is to try and add a few extra hoops to the application process. I ve frequently heard the suggestion of including a programming quiz of some sort in the application procedure. This does work, in the sense that it reduces the number of applications you get, but it doesn t work, in the sense that it doesn t really improve the quality. Great developers have enough choices of places to work that only require the usual cover letter/resume application to get started; by inventing artificial hoops and programming tests and whatnot simply to apply, you re just as

information on the ADO.NET Entity Framework, please go to msdn.microsoft.com/data/.

You are not going to customize the data model any further. Instead, create the Domain Service by first compiling the project. Compiling the project makes the newly created data model available so that the Add New Domain Service Class wizard can detect that it is available and thus create the service. The newly created service makes the Person Entity available to the Silverlight application. Right-click on the Domain Service folder, select Add | New Item , and click on Web to filter the project templates so that the Domain Service Class item template is visible. Give it a name of NorthwindSimpleDomainService and click Add. This brings up the Add New Domain Service Class wizard as shown in Figure 9-11.

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