Question

我正在创建一个显示HomeTeam和AwayTeam的篮球WPF应用。我创建了一个Player对象，在主窗口中我为主页（ObservableCollection）和客队（HomePlayersList）创建了AwayPlayersList个玩家对象。我在播放器对象上使用了INotifyPropertyChanged接口，因此当IsInGame bool为true时，播放器会根据计数添加到两个ObservableCollection<Player>中的一个。（如果列表一ObservableCollection<Player> HomeTeam或ObservableCollection<Player> AwayTeam计数为5，则其余列表会添加到替换列表ObservableCollection<Team> HomeSub或ObservableCollection<Team> AwaySub。）

但是我试图区分玩家是在主场还是在客队中，并且根据玩家所在的列表，玩家将被添加到新的主页或离开的列表中。

public static ObservableCollection<Player> HomePlayersList;
public static ObservableCollection<Player> AwayPlayersList;
public static ObservableCollection<Player> HomeTeam = new ObservableCollection<Player>();
public static ObservableCollection<Player> AwayTeam = new ObservableCollection<Player>();
public static ObservableCollection<Player> HomeSub = new ObservableCollection<Player>();
public static ObservableCollection<Player> AwaySub = new ObservableCollection<Player>();
public static int HomeSubCount = 7;

public class Player: INotifyPropertyChanged
{
    public static bool IsHome = true;
    private static int TotalSelected = 1;
    public string Id { get; set; }           //player ID
    public string FirstName { get; set; }    //player first name
    public string SecondName { get; set; }    //player second name
    public string KnownName { get; set; }     //player known name
    public string Position { get; set; }      //player position
    public string Number { get; set; }       //player number

    public bool isInGame;

    public bool IsInGame
    {
        get { return isInGame; }

        set
        {
            if (value != isInGame)
            {
                isInGame = value;

                if (isInGame)
                {
                    OnPropertyChanged("IsInGame", true);
                }
                else
                {
                    OnPropertyChanged("IsInGame", false);
                }
            }
        }
    }

    protected void OnPropertyChanged(PropertyChangedEventArgs e)
    {
        PropertyChangedEventHandler handler = PropertyChanged;
        if (handler != null)
            handler(this, e);
    }

    protected void OnPropertyChanged(string propertyName, bool state)
    {
        OnPropertyChanged(new PropertyChangedEventArgs(propertyName));

        if (state)
        {
            if (TotalSelected > 5 + MainWindow.HomeSubCount)
            {
                this.IsInGame = false;
                return;
            }

            if (MainWindow.HomeTeam.Count < 5)
                MainWindow.HomeTeam.Add(this);
            else
            {
                if (MainWindow.HomeSub.Count < MainWindow.HomeSubCount)
                {
                    MainWindow.HomeSub.Add(this);
                }
            }
            TotalSelected++;
        }
        else
        {

            if (SearchForMe(MainWindow.HomeTeam) != null)
            {
                MainWindow.HomeTeam.Remove(SearchForMe(MainWindow.HomeTeam));
                TotalSelected--;
                return;
            }

            if (SearchForMe(MainWindow.HomeSub) != null)
            {
                MainWindow.HomeSub.Remove(SearchForMe(MainWindow.HomeSub));
                TotalSelected--;
                return;
            }
        }
    }

    private Team SearchForMe(ObservableCollection<Team> OCT)
    {
        return OCT.Where(i => i.Number == this.Number).SingleOrDefault();
    }

    public event PropertyChangedEventHandler PropertyChanged;`enter code here`
}

Answer 1

在Player类中粘贴属性

ObservableCollection<Player> CurrnetIn { get; set; }

并设置此属性，如果您在某个集合中添加播放器。或者我误解了这个问题。

Answer 2

您可以使用Contains类的ObservableCollection<T>方法来确定特定对象是否已在集合中：

if (MainWindow.HomeTeam.Contains(this))
{
    MainWindow.HomeTeam.Remove(this);
    TotalSelected--;
    return;
}

由于您的Player类没有实现IEquatable<T>接口，因此您传递给Contains方法的引用将与集合中的项目进行比较，这些项目完全没问题在这种情况下：

Does List<String>.Contains(mystring) do a reference comparison or a value comparison?

如何区分对象类型c＃

2 个答案: