Xamarin - 将 ListView 子项绑定到自定义列表属性

Question

我在绑定到列表视图时遇到问题。

视图模型：

public class MainPageViewModel : INotifyPropertyChanged
{

    public MainPageViewModel()
    {

    }

    private ObservableCollection<Player> players;

    public ObservableCollection<Player> Players
    {
        get { return players; }
        set 
        { 
            players = value;                
            PropertyChanged?.Invoke(this, new PropertyChangedEventArgs("Players")); 
        }
    }

    private List<string> playerNames = new List<string>();
    public List<string> PlayerNames
    {
        get { return playerNames; }
        set
        {
            playerNames = value;
            PropertyChanged?.Invoke(this, new PropertyChangedEventArgs("PlayerNames"));
        }
    }

    private GameType selectedGame;

    public GameType SelectedGame
    {
        get { return selectedGame; }
        set 
        {
            selectedGame = value;
            PropertyChanged?.Invoke(this, new PropertyChangedEventArgs("SelectedGame"));
        }
    }

    private string gameName;

    public string GameName
    {
        get { return gameName; }
        set
        {
            gameName = value;
            PropertyChanged?.Invoke(this, new PropertyChangedEventArgs("GameName"));
        }
    }

    public event PropertyChangedEventHandler PropertyChanged;
    
}

玩家：

public class Player : INotifyPropertyChanged
{

    public event PropertyChangedEventHandler PropertyChanged;

    private string name;

    public string Name
    {
        get { return name; }
        set { name = value; PropertyChanged?.Invoke(this, new PropertyChangedEventArgs("Name")); }
    }

    private string currentScore = "0";

    public string CurrentScore
    {
        get { return currentScore; }
        set { currentScore = value; PropertyChanged?.Invoke(this, new PropertyChangedEventArgs("CurrentScore")); }
    }

    private string gamesWon = "0";

    public string GamesWon
    {
        get { return gamesWon; }
        set { gamesWon = value; PropertyChanged?.Invoke(this, new PropertyChangedEventArgs("GamesWon")); }
    }

    //public override string ToString()
    //{
    //    return Name;
    //}


}

列表视图：

<ListView x:Name="listviewPlayers" HorizontalOptions="End" ItemsSource="{Binding Players}">
            <ListView.ItemTemplate>
                <DataTemplate>
                    <Label Text="{Binding Players.Name}" />

                </DataTemplate>
            </ListView.ItemTemplate>
        </ListView>

更新视图模型：

public void InitGame(Game game)
    {
        //initialize points and setup first player
        viewModel.Players = game.Players;
        viewModel.SelectedGame = game.SelectedGame;
        viewModel.GameName = game.SelectedGame.Name;
        contentMain.BindingContext = viewModel;            
    }

上述 ListView 绑定不起作用 - 出现错误：在类型“ObservableCollection`1”中找不到属性“Name”。但是，如果我删除 ItemTemplate 并将列表视图的项目源绑定到 {Binding Players[0].Name}，列表视图将显示列表玩家中的每个名称。 我看不出我做错了什么。希望在这里得到一些帮助。

谢谢，迈克

Answer 1

这样做

<Label Text="{Binding Name}" />

每行的

BindingContext

 是 

ItemsSource

 的匹配元素，因此在您的情况下，它是单独的 

Player

 实例