我被困在试图让下面几行工作的东西,这里是一个完整的代码示例,可以在Visual Studio中运行,演示我正在谈论的场景。当我改变播放器的IsReady值时,这里的一切都按预期工作,附加到事件的lambda被触发,并且(如果)评估为true。然而,Console.WriteLine从来没有命中,因为看起来ConcurrentBag中播放器的IsReady值没有更新。与LINQ和对象引用相关的问题
class Program
{
public static ConcurrentBag<Player> Players { get; set; }
static void Main(string[] args)
{
Players = new ConcurrentBag<Player>();
Player player = new Player() { Id = "123" };
Players.Add(player);
player.IsReady.ValueChanged += (from, to) =>
{
if (to)
{
if (Players.All(p => p.IsReady.Value))
{
Console.WriteLine("It worked");
}
}
};
LookupPlayerById("123").IsReady.Value = true;
}
public static Player LookupPlayerById(string clientId)
{
var player = Players.FirstOrDefault(x => x.Id == clientId);
return player;
}
}
public class Player
{
public string Id { get; set; }
public MonitoredValue<bool> IsReady { get; set; }
public Player()
{
IsReady = new MonitoredValue<bool>(false);
}
}
public class MonitoredValue<T>
{
public delegate void ValueChangedHandler(T from, T to);
public event ValueChangedHandler ValueChanged;
private T m_Value;
public T Value
{
get { return m_Value; }
set
{
if (ValueChanged != null) // if invocation list is not empty, fire the event
{
ValueChanged(m_Value, value);
}
m_Value = value;
}
}
public MonitoredValue() { }
public MonitoredValue(T initialValue)
{
m_Value = initialValue;
}
}
'Player'是'class'或一个'struct'? –
玩家是一个类 –
然后你返回一个'参考'到Player对象。改变它的状态将影响同一个对象,从'ConcurrentBag'被存储的链接 –