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There is actually little to be done when writing the Web service class s definition. Obviously, you need to define the methods that are going to be available from the Web service. The thing that may be a little less obvious is adding only one SqlConnection member variable. It seemed a little weird to me at first that only one SqlConnection is needed to support all clients that are trying to access the Web service. Yes, I simplified things by not worrying about concurrency. But in 18, which covers multithreading, you ll discover how you can even handle concurrency with a single instance of a SqlConnection. As you can see in Listing 17-11, there is nothing special. Listing 17-11. Author.asmx.h using using using using using using namespace namespace namespace namespace namespace namespace System; System::Configuration; System::Data; System::Data::SqlClient; System::Web; System::Web::Services;

Now that tapping the button successfully calls urlbuttonTapped, that method aims to load the Apress.com web site into the UIWebView. In order to send this URL request to the UIWebView, the MyWebViewController class needs to connect an outlet to it. Similar to how you wired the button s action, the outlet runs in the opposite direction. In the main window, control-click (or right-click) the File s Owner icon, and a dark-gray contextual menu will appear. Click the mywebView s empty dot (listed under Outlets) and, while holding down the mouse button, drag the cursor over to the UIWebView in the View

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namespace Author { [WebServiceBinding(ConformsTo=WsiProfiles::BasicProfile1_1, EmitConformanceClaims = true)] [WebService(Namespace="http://procppcli.net", Description = "Author table access Web service")] public ref class AuthorClass : public System::Web::Services::WebService { private: SqlConnection^ sqlConnection; public: AuthorWSClass(); protected: ~AuthorWSClass(); public: [WebMethod(Description = "Method to retrieve All Authors from the database")] DataSet ^GetAuthors(); [WebMethod(Description = "Method to Commit changed made on client with Server database")] void UpdateAuthors(DataSet ^dSet); }; }

2. In the New Team Project dialog box, enter the team project name as EffortTracking, as shown in Figure 2-3, and then click Next. 3. Select a process template. Selecting the process template when you create your team project is the key decision point in the entire procedure. Everything that follows is based on this one decision, as described in this chapter. For this example, choose MSF for CMMI Process Improvement v4.0, as shown in Figure 2-4. Click Next to continue.

The easier of the two Web service methods to implement relates to filling a DataSet of all authors and then sending the DataSet from the Web service to the consuming client (see Listing 17-12). Listing 17-12. Building the Authors DataSet Web Service DataSet^ AuthorClass::GetAuthors() { SqlDataAdapter ^dAdapt; DataSet ^dSet; dAdapt = gcnew SqlDataAdapter(); dAdapt->MissingSchemaAction = MissingSchemaAction::AddWithKey; dAdapt->SelectCommand = gcnew SqlCommand("SELECT AuthorID, LastName, FirstName FROM Authors", sqlConnection); dSet = gcnew DataSet(); dAdapt->Fill(dSet, "Authors"); return dSet; } As you can see, a Web service has no problems sending the complex DataSet object using SOAP. In fact, if it wasn t for the WebMethod attribute found in the method s declaration, this method would look like any other ADO.NET DataSet fill method. One big difference, though, is that this method uses its own method scope version of the DataAdapter and DataSet. The reason is that a Web service (unless otherwise specified using the EnableSession property of the WebMethod attribute) is stateless. Basically, each time the Web service is called, it is from scratch. Thus, there is no need to have the DataAdapter or DataSet stick around after the Web service method has finished. For this same reason, there is no reason to assign the InsertCommand, UpdateCommand, and DeleteCommand properties to the DataAdapter as they are not used in the method.

Inserting, updating, and deleting rows in a DataSet via a Web service is handled in virtually the same way as standard, nondistributed ADO.NET. The UpdateAuthors() method (see Listing 17-13) is made up of code that is almost exactly the same as what you saw in 13. Listing 17-13. Updating the Authors Database Web Service void AuthorClass::UpdateAuthors(DataSet ^dSet) { SqlDataAdapter ^dAdapt; dAdapt = gcnew SqlDataAdapter(); dAdapt->MissingSchemaAction = MissingSchemaAction::AddWithKey; dAdapt->InsertCommand = gcnew SqlCommand("INSERT INTO Authors (LastName, FirstName) " "VALUES (@LastName, @FirstName)", sqlConnection);

4. On the next wizard page, provide a title for the team project portal site and an optional description. 5. Specify your source control settings. For this example, select to create an empty source control folder, as shown in Figure 2-5.

window. Just as when you are wiring an action, you ll see a blue line flowing from the File s Owner icon to your cursor s location (see Figure 2 8). Release the mouse button above the UIWebView to complete the outlet connection. And last, but not least, save the MyWebViewController.xib file before returning to Xcode.

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