C # Binding Images d'une liste à l'intérieur d'une observablecollection à montrer à Longlistselector

Question

J'ai un problème où je tente d'afficher des images de ma liste à l'intérieur de mon Longlistselector, mais lorsque je tente de lier mon élément longlisteur à ma liste qui contient mes images, il ne montrera pas d'images.

My Longlistselector en XAML:

<phone:PivotItem Header="Images">
        <Grid>
            <phone:LongListSelector LayoutMode="Grid" IsGroupingEnabled="True" GridCellSize="180,180" Margin="0,0,-12,0" ItemsSource="{Binding}">
            <phone:LongListSelector.ItemTemplate>
                <DataTemplate>
                    <Grid Background="{StaticResource PhoneAccentBrush}" Margin="5">
                        <StackPanel>
                                <Image Source="{Binding Images}"></Image>
                        </StackPanel>
                    </Grid>
                </DataTemplate>
            </phone:LongListSelector.ItemTemplate>
            </phone:LongListSelector>
        </Grid>
    </phone:PivotItem>

et mon DataContext:

this.DataContext = gd.GetGameItems;

L'observablecollection IM Reliure à mon élément longliste qui contient mes images de liste:

private ObservableCollection<GetGame> _GetGameItems = new ObservableCollection<GetGame>();
public ObservableCollection<GetGame> GetGameItems
{
    get
    {
        return this._GetGameItems;
    }
}

Le code pour lire le XML et pour stocker des données. La méthode getimages est l'endroit où je reçois les images et les mettre dans ma liste (images) du XML que j'aimerais montrer dans mon Longlistselector. La classe getgame est où je stocke mes données:

var feedXml = XDocument.Parse(e.Result);

        var gameData = feedXml.Root.Descendants("Game").Select(x => new GetGame
        {
            ID = (int)x.Element("id"),
            GameTitle = (string)x.Element("GameTitle"),
            Platform = (string)x.Element("Platform"),
            ReleaseDate = (string)x.Element("ReleaseDate"),
            Images = GetImages(x).ToList(),
        })
          .ToList();
        foreach (var item in gameData) GetGameItems.Add(item);
    }
}

private static IEnumerable<Uri> GetImages(XElement gameNode)
{
    return gameNode
              .Descendants("boxart")
              .Select(t => new Uri("http://thegamesdb.net/banners/" + (string)t.Attribute("thumb")));
}

public class GetGame
{
public int ID { get; set; }
public string GameTitle { get; set; }
public string Platform { get; set; }
public string ReleaseDate { get; set; }
public List<Uri> Images { get; set; }

} Ceci est mon xml:

<Data>
  <baseImgUrl>http://thegamesdb.net/banners/</baseImgUrl>
  <Game>
    <id>2</id>
    <GameTitle>Crysis</GameTitle>
     <PlatformId>1</PlatformId>
     <Platform>PC</Platform>
     <ReleaseDate>11/13/2007</ReleaseDate>
     <Overview>
     From the makers of Far Cry, Crysis offers FPS fans the best-looking, most highly-        evolving gameplay, requiring the player to use adaptive tactics and total customization of    weapons and armor to survive in dynamic, hostile environments including Zero-G. Earth, 2019. A team of US scientists makes a frightening discovery on an island in the South China Sea. All contact with the team is lost when the North Korean Government quickly seals off the area. The United States responds by dispatching an elite team of Delta Force Operators to recon the situation. As tension rises between the two nations, a massive alien ship reveals itself in the middle of the island. The ship generates an immense force sphere that freezes a vast portion of the island and drastically alters the global weather system. Now the US and North Korea must join forces to battle the alien menace. With hope rapidly fading, you must fight epic battles through tropical jungle, frozen landscapes, and finally into the heart of the alien ship itself for the ultimate Zero G showdown.
    </Overview>
    <ESRB>M - Mature</ESRB>
    <Genres>
    <genre>Shooter</genre>
    </Genres>
    <Players>4+</Players>
    <Co-op>No</Co-op>
    <Youtube>http://www.youtube.com/watch?v=i3vO01xQ-DM</Youtube>
    <Publisher>Electronic Arts</Publisher>
    <Developer>Crytek</Developer>
    <Rating>8.1111</Rating>
    <Images>
      <fanart>
        <original width="1920" height="1080">fanart/original/2-1.jpg</original>
        <thumb>fanart/thumb/2-1.jpg</thumb>
      </fanart>
      <fanart>
        <original width="1920" height="1080">fanart/original/2-2.jpg</original>
        <thumb>fanart/thumb/2-2.jpg</thumb>
      </fanart>
      <fanart>
        <original width="1920" height="1080">fanart/original/2-3.jpg</original>
        <thumb>fanart/thumb/2-3.jpg</thumb>
      </fanart>
      <fanart>
        <original width="1920" height="1080">fanart/original/2-4.jpg</original>
        <thumb>fanart/thumb/2-4.jpg</thumb>
      </fanart>
      <fanart>
        <original width="1920" height="1080">fanart/original/2-5.jpg</original>
        <thumb>fanart/thumb/2-5.jpg</thumb>
      </fanart>
      <fanart>
        <original width="1920" height="1080">fanart/original/2-6.jpg</original>
        <thumb>fanart/thumb/2-6.jpg</thumb>
      </fanart>
    <boxart side="back" width="1525" height="2162" thumb="boxart/thumb/original/back/2-1.jpg">boxart/original/back/2-1.jpg</boxart>
    <boxart side="front" width="1525" height="2160" thumb="boxart/thumb/original/front/2-1.jpg">boxart/original/front/2-1.jpg</boxart>
    <banner width="760" height="140">graphical/2-g2.jpg</banner>
    <banner width="760" height="140">graphical/2-g3.jpg</banner>
      <screenshot>
        <original width="1920" height="1080">screenshots/2-1.jpg</original>
        <thumb>screenshots/thumb/2-1.jpg</thumb>
      </screenshot>
    <clearlogo width="400" height="95">clearlogo/2.png</clearlogo>
    </Images>
  </Game>
</Data>

Donc, le problème consiste à obtenir cette liste avec des images pour apparaître dans mon élément longlister. Je ne sais pas si cela a quelque chose à voir avec ce que mes images de la liste sont à l'intérieur de mon observaCollection GetGameMeems:

public List<Uri> Images { get; set; }

J'espère qu'il y a quelqu'un qui peut m'aider, merci.

Answer 1

Vous essayez d'attribuer une liste sous la forme d'une source d'image, ce qui ne fonctionnera pas.Vous devez avoir une propriété pour une image si vous liez une image.

Voici un exemple sur la façon dont vous pourriez faire,

 public class PhotoItem
    {
        public string Name { get; set; }
        public BitmapImage Photo { get; set; }

        public static List<PhotoItem> getPhotos()
        {
            PhotoItem one = new PhotoItem();
            one.Photo = new BitmapImage(new Uri("",UriKind.Relative));
            one.Name = "Image1";

            PhotoItem two = new PhotoItem();
            two.Photo = new BitmapImage(new Uri("", UriKind.Relative));
            two.Name = "Image1";

            List<PhotoItem> Photos = new List<PhotoItem>();
            Photos.Add(one);
            return Photos;
        }

Votre viewModel,

class PhotoItemViewModel : INotifyPropertyChanged
    {
        private ObservableCollection<PhoneApp1.Model.PhotoItem> _photoList;
        public ObservableCollection<PhoneApp1.Model.PhotoItem> PhotoList
        {
            get
            {
                return _photoList;
            }

            set
            {
                _photoList = value;
                OnPropertyChanged();
            }


        }

        public event PropertyChangedEventHandler PropertyChanged;

        protected virtual void OnPropertyChanged([CallerMemberName] string propertyName = null)
        {
            PropertyChangedEventHandler handler = PropertyChanged;
            if (handler != null) handler(this, new PropertyChangedEventArgs(propertyName));
        }

        public void LoadData()
        {
            _photoList = new ObservableCollection<Model.PhotoItem>(Model.PhotoItem.getPhotos());

        }
    }

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 Name}"></TextBlock>
                        <Image Source="{Binding Photo}"></Image>
                    </StackPanel>           
                </DataTemplate>
            </phone:LongListSelector.ItemTemplate>            
        </phone:LongListSelector>
    </Grid>

code derrière:

public MainPage()
        {
            InitializeComponent();
            ViewModel.PhotoItemViewModel _vm = new ViewModel.PhotoItemViewModel();
            this.DataContext = _vm;
        }