Windows應用商店應用DataBind TextBlock從對象從Web服務

Question

我有一個Web服務，返回一個用戶對象的名字，姓氏，EmailAddress等......我建立一個Windows 8商店應用程序，我需要綁定對象從Web服務到我的應用程序控件。我可以調用Web服務，並將我期望的User對象中的值返回。我無法弄清楚如何將信息綁定到Windows 8 Store應用程序控件。我第一次嘗試是將名字綁定到一個名爲txtUserName的TextBlock：

這裏是面向網格的文本塊是在XAML：

<Grid x:Name="MainMenuGrid"> 
      <Grid.DataContext> 
       <local:CurrentUserDataSource/> 
      </Grid.DataContext> 
      <Grid.RowDefinitions> 
       <RowDefinition Height="100"/> 
       <RowDefinition Height="Auto"/> 
      </Grid.RowDefinitions> 
      <TextBlock TextWrapping="Wrap" Text="Welcome to Cuisinier Creatif"  VerticalAlignment="Center" FontSize="64" Margin="5" HorizontalAlignment="Center"/> 
      <VariableSizedWrapGrid HorizontalChildrenAlignment="Stretch" ItemHeight="195" ItemWidth="200" MaximumRowsOrColumns="2" Orientation="Vertical" Grid.Row="1" HorizontalAlignment="Center" VerticalAlignment="Center"> 
       <Button x:Name="btnMyRecipeBooks" Content="My Reipie Books" Width="200" HorizontalAlignment="Stretch" Height="140" Margin="2"/> 
       <Button x:Name="btnewRecipeBook" Content="New Recipe Book" Width="200" HorizontalAlignment="Stretch" Height="140" Margin="2"/> 
       <Button x:Name="btnMyRecipes" Content="My Reipies" Width="200" HorizontalAlignment="Stretch" Height="140" Margin="2"/> 
       <Button x:Name="btnNewRecipe" Content="New Recipe" Width="200" HorizontalAlignment="Stretch" Height="140" Margin="2"/> 
       <Button x:Name="btnShoppingList" Content="Shopping List" Width="200" HorizontalAlignment="Stretch" Height="140" Margin="2"/> 
       <Button x:Name="btnMyInformation" Content="My Information" Width="200" HorizontalAlignment="Stretch" Height="140" Margin="2" /> 
      </VariableSizedWrapGrid> 
      <TextBlock x:Name="txtUserName" TextWrapping="Wrap" Text="{Binding ThisUser[0].FirstName}" VerticalAlignment="Center" FontSize="64" HorizontalAlignment="Left" Margin="5" Width="50" Height="150"/> 
     </Grid> 

類CurrentUserDataSource類：

class CurrentUserDataSource 
{ 
    public CurrentUserDataSource() 
    { 
    } 
    public CurrentUserDataSource(User user) 
    { 
     LoadUser(user); 
    } 
    private ObservableCollection<CurrentUser> currentUser; 

    public ObservableCollection<CurrentUser> ThisUser 
    { 
     get { return currentUser; } 
     set { currentUser = value; } 
    } 
    private void LoadUser(User user) 
    { 
     currentUser = new ObservableCollection<CurrentUser> 
     { 
      new CurrentUser 
      { 
       FirstName = user.FirstName, 
       LastName = user.LastName, 
       EmailAddress = user.LastName, 
       LastSignIn = user.LastSignIn, 
       SignUpdate = user.SignUpdate 
      } 
     }; 
    } 
} 

CurrentUserClass：

class CurrentUser:INotifyPropertyChanged 
    { 
     public event PropertyChangedEventHandler PropertyChanged; 
     private string _firstname; 
     private string _lastname; 
     private DateTime _lastsignin; 
     private DateTime _signupdate; 
     private string _emailaddress; 

     public CurrentUser() 
     { 

     } 
     public CurrentUser(User user) 
     { 
      this.FirstName = user.FirstName; 
      this.LastName = user.LastName; 
      this.LastSignIn = user.LastSignIn; 
      this.SignUpdate = user.SignUpdate; 
      this.EmailAddress = user.EmailAddress; 
     } 
     private void NotifyPropertyChanged(string property) 
     { 
      if (PropertyChanged != null) 
      { 
       PropertyChanged(this, new PropertyChangedEventArgs(property)); 
      } 
     } 
     public string FirstName 
     { 
      get { return this._firstname; } 
      set 
      { 
       _firstname = value; 
       NotifyPropertyChanged("FirstName"); 
      } 
     } 
    } 
} 

代碼在頁面上：

public sealed partial class MainMenu : Page 
    { 
     User usr = new User(); 
     public MainMenu() 
     { 
      this.InitializeComponent(); 

     } 

     /// <summary> 
     /// Invoked when this page is about to be displayed in a Frame. 
     /// </summary> 
     /// <param name="e">Event data that describes how this page was reached. The Parameter 
     /// property is typically used to configure the page.</param> 
     protected override void OnNavigatedTo(NavigationEventArgs e) 
     { 
      usr = (User)e.Parameter; 
      CurrentUserDataSource cuDS = new CurrentUserDataSource(usr); 

     } 
    } 

我想我錯過了一些明顯的東西。我已經通過一些教程，並找不到我缺少的東西。

Answer 1

發現我需要監守用戶需要作爲一個對象被傳遞到執行數據在後面結合代碼：

user = (User)e.Parameter; 
      CurrentUserDataSource cuDS = new CurrentUserDataSource(user); 
      MainMenuGrid.DataContext = cuDS; 

從http://social.msdn.microsoft.com/Forums/en-US/winappswithcsharp/thread/cbb3bed3-c883-40ff-b2aa-5b2aacb4bf27/