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The team used two metrics to assess their progress. In the Construction phase they estimated the proportion of the functionality that they had completed. In the Testing phase they counted the number of bugs that had been reported.The sheer number of bugs made it clear that the software was of low quality, but this metric misled the team into believing that fixing these bugs would be enough to fix the software. But the more frantically they worked on the software, the more messy and fragile it became.Their efforts just reduced the quality even further.

if (this.loginPanel.Visibility == Visibility.Collapsed) { this.registerForm.IsEnabled = enabled; this.registerButton.IsEnabled = enabled; this.backToLogin.IsEnabled = enabled;

Various tasks concerning lists are demonstrated in this section: How to retrieve all the SharePoint lists in a web site How to retrieve list schema (field) information How to create a new SharePoint list How to retrieve an existing SharePoint list using a CAML query

You can retrieve all the lists for a web site using the property Web.Lists. Simply load and query the list collection and iterate through the lists. The code starts immediately after loading the XAP file by calling the GetAllLists method (see Listing 13 10). Listing 13 10. Retrieving All Lists for a Web Site (MainPage.cs) public partial class MainPage : UserControl { public MainPage() { InitializeComponent(); GetAllLists(); } ListCollection listColl; private void ClientSuccess(object sender,

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if (enabled && setRegisterFormEditState) { this.registerForm.BeginEdit(); } } else { this.loginButton.IsEnabled = enabled; this.loginUserNameBox.IsEnabled = enabled; this.loginPasswordBox.IsEnabled = enabled; this.registerNow.IsEnabled = enabled; this.loginUserNameBox.Focus(); } } private void BackToLogin_Click(object sender, RoutedEventArgs e) { VisualStateManager.GoToState(this, "GoToNothingTransition", true); VisualStateManager.GoToState(this, "GoToLoginTransition", true); ToLogin.Begin(); this.Title = "Login"; } } } The LoginWindow form ties in to the RIA Services framework with these declarations: private AuthenticationService _authService = RiaContext.Current.Authentication; private UserInformation _userInformation = new UserInformation(); private UserRegistrationContext _registration = new UserRegistrationContext(); The first line of code obtains a reference to the current authentication configuration, which is configured to Forms in App.xaml as part of the default Business Application template. The other two lines of code obtain references to classes defined on the middle tier with the EnableClientAccess attribute so that they are available in Ch09_LOBApplications.TestWeb.g.cs. Actual login occurs in the LoginButton_Click event handler in Listing 9-3, in this code: _authOp = _authService.Login(this.loginUserNameBox.Text, this.loginPasswordBox.Password); authOp.Completed += LoginOperation_Completed; New users can click the Registration button to configure the registration UI. Registration occurs in RegisterButton_Click:

ClientRequestSucceededEventArgs e) { Dispatcher.BeginInvoke(() => { lbAllLists.DataContext = listColl; }); } private void ClientFailed(object sender, ClientRequestFailedEventArgs e) { MessageBox.Show(e.Exception.Message, "Exception", MessageBoxButton.OK); } private void GetAllLists() { using (ClientContext ctx = new ClientContext("http://sharepointserve/")) { try { listColl = ctx.Web.Lists; ctx.Load(listColl); ctx.ExecuteQueryAsync( new ClientRequestSucceededEventHandler(ClientSuccess), new ClientRequestFailedEventHandler(ClientFailed)); } catch (Exception ex) { MessageBox.Show(ex.Message, "Exception", MessageBoxButton.OK); } } } } The corresponding XAML implementation in Listing 13 11 simply uses a ListBox element to expose the collection through data binding. The list displays the title and description. The binding uses the ListCollection class and the List elements it contains to bind the properties Title and Description, respectively. Listing 13 11. Retrieving All the Lists for a Web Site (XAML) <UserControl x:Class="RetrieveAllLists.MainPage" xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" xmlns:d="http://schemas.microsoft.com/expression/blend/2008" xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006" mc:Ignorable="d" d:DesignHeight="300" d:DesignWidth="400"> <Grid x:Name="LayoutRoot" Background="White"> <TextBlock >Shows all Lists of the current root Web:</TextBlock> <ListBox x:Name="lbAllLists" Margin="5,25,5,5" ItemsSource="{Binding}" > <ListBox.ItemTemplate> <DataTemplate>

<StackPanel Orientation="Horizontal"> <TextBlock Text="{Binding Title}" Margin="5"></TextBlock> <TextBlock Text="{Binding Description}" Margin="5"> </TextBlock> </StackPanel> </DataTemplate> </ListBox.ItemTemplate> </ListBox> </Grid> </UserControl> The example returns all the lists containing all their properties. To reduce the number of properties, you should explicitly define only those properties you really need. For collections, this can be done using LINQ in combination with the Include expression: ctx.Load(listColl, lists => lists.Include(list => list.Title, list => list.Description)); The result of the example code is shown in Figure 13 9.

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