windows phone 8 uri изображения не отображаются

Question

Я действительно не понял, почему мое миниатюрное изображение не отображается. , Я показываю изображение из google book api. может кто-нибудь помочь мне в этом вопросе. вот соответствующий код.

одна путаница: мне нужно создать растровое изображение и назначить мой uri ему в конвертере? не будет ли работать без установки строки с источником изображения?

<DataTemplate x:Key="BooksItemTemplate"> 
     <Grid DataContext="{Binding}" Margin="{StaticResource PhoneTouchTargetOverhang}" Background="Transparent"> 
      <Grid.ColumnDefinitions> 
       <ColumnDefinition Width="Auto"/> 
       <ColumnDefinition Width="*"/> 
      </Grid.ColumnDefinitions> 
      <Button Name="btnAnswer4"> // problem is here 
       <Image Name="thumbnailimage" Source="{Binding Images}" Width="110" Height="150" VerticalAlignment="Top"/> 
      </Button> 

      <StackPanel Grid.Column="1" VerticalAlignment="Top"> 
       <TextBlock Text="{Binding BookTitle}" Style="{StaticResource PhoneTextNormalStyle}" TextWrapping="Wrap" FontFamily="{StaticResource PhoneFontFamilySemiBold}"/> 
       <TextBlock Text="{Binding Identificationno}" Style="{StaticResource PhoneTextNormalStyle}" TextWrapping="Wrap" FontFamily="{StaticResource PhoneFontFamilySemiLight}"/> 
      </StackPanel> 
     </Grid> 
    </DataTemplate> 




<phone:LongListSelector x:Name="bookslist" 
           Background="Transparent"         
           ItemTemplate="{StaticResource BooksItemTemplate}"/> 

вот мой репозиторий класса

public class BookCategoriesRepository 
{ 

    private List<BookCategories> bookcategoriesList = new List<BookCategories>(); 
    public BookCategoriesRepository() 
    { 
     bookcategoriesList.Add(new BookCategories() { BookcategoryId = 1, CategoryId = 1, Identificationno = "ASDDDD", BookId = 1, BookTitle = "The power of art", Images = "http://bks1.books.google.com/books?id=mKbrGAAACAAJ&printsec=frontcover&img=1&zoom=5&source=gbs_api" }); 
     bookcategoriesList.Add(new BookCategories() { BookcategoryId = 2, CategoryId = 1, Identificationno = "ASDDDD1", BookId = 2, BookTitle = "Barto ´k, Hungary, and the Renewal of Tradition", Images = "http://bks1.books.google.com/books?id=mKbrGAAACAAJ&printsec=frontcover&img=1&zoom=5&source=gbs_api" }); 
     bookcategoriesList.Add(new BookCategories() { BookcategoryId = 3, CategoryId = 1, Identificationno = "ASDDDD2", BookId = 3, BookTitle = "America Is the Prison", Images = "http://bks0.books.google.com/books?id=a3yRlKxxDtkC&printsec=frontcover&img=1&zoom=5&edge=curl&source=gbs_api" }); 
     bookcategoriesList.Add(new BookCategories() { BookcategoryId = 4, CategoryId = 1, Identificationno = "ASDDDD3", BookId = 4, BookTitle = "Variations on a Blue Guitar", Images = "http://bks5.books.google.com/books?id=TKKd0TaNInAC&printsec=frontcover&img=1&zoom=5&edge=curl&source=gbs_api" }); 
     bookcategoriesList.Add(new BookCategories() { BookcategoryId = 5, CategoryId = 1, Identificationno = "ASDDDD4", BookId = 5, BookTitle = "Sponsorship", Images = "http://bks7.books.google.com/books?id=VlON_hK0fVEC&printsec=frontcover&img=1&zoom=5&edge=curl&source=gbs_api" }); 
     bookcategoriesList.Add(new BookCategories() { BookcategoryId = 6, CategoryId = 1, Identificationno = "ASDDDD5", BookId = 6, BookTitle = "I sensi delle arti", Images = "http://bks7.books.google.com/books?id=P7_pAAAAMAAJ&printsec=frontcover&img=1&zoom=5&source=gbs_api" }); 
     bookcategoriesList.Add(new BookCategories() { BookcategoryId = 7, CategoryId = 1, Identificationno = "ASDDDD6", BookId = 7, BookTitle = "Mahler's Fourth Symphony", Images = "http://bks1.books.google.com/books?id=ybNqORIKIekC&printsec=frontcover&img=1&zoom=5&edge=curl&source=gbs_api" }); 
     bookcategoriesList.Add(new BookCategories() { BookcategoryId = 8, CategoryId = 1, Identificationno = "ASDDDD7", BookId = 8, BookTitle = "The Commissariat of Enlightenment", Images = "http://bks0.books.google.com/books?id=a3yRlKxxDtkC&printsec=frontcover&img=1&zoom=5&edge=curl&source=gbs_api" }); 
     bookcategoriesList.Add(new BookCategories() { BookcategoryId = 9, CategoryId = 1, Identificationno = "ASDDDD8", BookId = 9, BookTitle = "Smallest Giant", Images= "http://bks5.books.google.com/books?id=TKKd0TaNInAC&printsec=frontcover&img=1&zoom=5&edge=curl&source=gbs_api" }); 
     bookcategoriesList.Add(new BookCategories() { BookcategoryId = 10, CategoryId = 1, Identificationno = "ASDDDD9", BookId = 10, BookTitle = "Dame Joan Hammond", Images = "http://bks7.books.google.com/books?id=VlON_hK0fVEC&printsec=frontcover&img=1&zoom=5&edge=curl&source=gbs_api" }); 
     bookcategoriesList.Add(new BookCategories() { BookcategoryId = 11, CategoryId = 1, Identificationno = "ASDDDD10", BookId = 11, BookTitle = "Star Trek and Philosophy", Images = "http://bks1.books.google.com/books?id=ybNqORIKIekC&printsec=frontcover&img=1&zoom=5&edge=curl&source=gbs_api" }); 
     bookcategoriesList.Add(new BookCategories() { BookcategoryId = 12, CategoryId = 1, Identificationno = "ASDDDD11", BookId = 12, BookTitle = "Manejo De Conflictos Desde La Sabiduria Del Cine Y Las Canciones", Images = "http://bks0.books.google.com/books?id=a3yRlKxxDtkC&printsec=frontcover&img=1&zoom=5&edge=curl&source=gbs_api" }); 
     bookcategoriesList.Add(new BookCategories() { BookcategoryId = 13, CategoryId = 2, Identificationno = "ASDDDD12", BookId = 13, BookTitle = "Smallest Giant", Images = "http://bks5.books.google.com/books?id=TKKd0TaNInAC&printsec=frontcover&img=1&zoom=5&edge=curl&source=gbs_api" }); 
     bookcategoriesList.Add(new BookCategories() { BookcategoryId = 14, CategoryId = 2, Identificationno = "ASDDDD13", BookId = 14, BookTitle = "Afropolis", Images = "http://bks7.books.google.com/books?id=VlON_hK0fVEC&printsec=frontcover&img=1&zoom=5&edge=curl&source=gbs_api" }); 

    } 

    public class BookCategories 
{ 
    private long _BookcategoryId { get; set; } 
    public long BookcategoryId 
    { 
     get 
     { 
      return _BookcategoryId; 
     } 
     set 
     { 
      _BookcategoryId = value;    
     } 
    } 



    private long _BookId { get; set; } 
    public long BookId 
    { 
     get 
     { 
      return _BookId; 
     } 
     set 
     { 
      _BookId = value; 
     } 
    } 



    private long _CategoryId { get; set; } 
    public long CategoryId 
    { 
     get 
     { 
      return _CategoryId; 
     } 
     set 
     { 
      _CategoryId = value; 
     } 
    } 



    private string _BookTitle { get; set; } 
    public string BookTitle 
    { 
     get 
     { 
      return _BookTitle; 
     } 
     set 
     { 
      _BookTitle = value; 
     } 
    } 



    private string_Image { get; set; } 
    public string Images 
    { 
     get 
     { 
      return _Image; 
     } 
     set 
     { 
      _Image = value;    
     } 
    } 



    private string _Identificationno { get; set; } 
    public string Identificationno 
    { 
     get 
     { 
      return _Identificationno; 
     } 
     set 
     { 
      _Identificationno = value; 
     } 
    } 


} 

здесь xaml.cs метод

protected override void OnNavigatedTo(System.Windows.Navigation.NavigationEventArgs e) 
    { 
     base.OnNavigatedTo(e); 
     string categoryid = string.Empty; 
     if (NavigationContext.QueryString.TryGetValue("catid", out categoryid)) 
     { 
      bookcategoriesvm.GetBookcategories(Convert.ToInt64(categoryid));    
     } 

     bookslist.ItemsSource = bookcategoriesvm.BooksCategoriesList; 
    } 

Answer 1

страница Иногда это может быть вызвано неправильной даты + время конфигурации.