如何使用XAML和C＃從Windows Phone 8中的文件夾創建圖庫？

Question

我正在構建一個Windows Phone 8應用程序，它需要從創建的按鈕（按下它）訪問帶有一些預定圖像（不是默認的Windows Phone圖庫應用程序）的圖像庫。然後，目標是圖像庫返回該圖庫中選定項目的圖像（或路徑）（我不知道它會返回什麼）到我正在構建的應用程序，以便在列表框控件上使用該圖像。

您能告訴我如何創建需要使用XAML和C＃的圖像庫嗎？

非常感謝！

Answer 1

創建一個類，

PhotoItem.cs

公共類PhotoItem { 公共字符串PhotoName {獲得;組; } public BitmapImage Photo {get;組; }

public static List<PhotoItem> GetPhotos() 
{ 
    return new List<PhotoItem>() 
    { 
     new PhotoItem(){PhotoName="Image1",Photo = new BitmapImage(new Uri("/Images/Image1.jpg", UriKind.Relative))}, 
     new PhotoItem(){PhotoName="Image2",Photo = new BitmapImage(new Uri("/Images/Image2.jpg", UriKind.Relative))}, 
    }; 
} 

}

PhotoItemViewModel.cs

public class PhotoItemViewModel : INotifyPropertyChanged 
    { 
     private ObservableCollection<PhotoItem> photoList; 
     public ObservableCollection<PhotoItem> PhotoList 
     { 
      get 
      { 
       return photoList; 
      } 
      set 
      { 
       photoList = value; 
       NotifyPropertyChanged(); 
      } 
     } 

     public void LoadData() 
     { 
      PhotoList = new ObservableCollection<PhotoItem>(PhotoItem.GetPhotos()); 
     } 

     public event PropertyChangedEventHandler PropertyChanged; 
     public void NotifyPropertyChanged([CallerMemberName] string propertyName = null) 
     { 
      if (PropertyChanged != null) 
      { 
       PropertyChanged(this, new PropertyChangedEventArgs(propertyName)); 
      } 
     } 
    } 

XAML

<Grid x:Name="ContentPanel" Grid.Row="1" Margin="12,0,12,0"> 
     <phone:LongListSelector ItemsSource="{Binding PhotoList}"> 
      <phone:LongListSelector.ItemTemplate> 
       <DataTemplate> 
        <StackPanel> 
         <TextBlock Text="{Binding PhotoName}"></TextBlock> 
         <Image Source="{Binding Photo}"></Image> 
        </StackPanel> 
       </DataTemplate> 
      </phone:LongListSelector.ItemTemplate> 
     </phone:LongListSelector> 
    </Grid> 

而且在CodeBehind.cs

public MainPage() 
     { 
      InitializeComponent(); 
      this.Loaded += MainPage_Loaded; 
     } 

     void MainPage_Loaded(object sender, RoutedEventArgs e) 
     { 
      viewModel.LoadData(); 
      DataContext = viewModel; 
     }