Question

我有一个函数委托返回一个对象我将该对象存储在列表中我想遍历该列表以获取对象中的值，但是在for循环中我无法这样做：

public static class Tracking
{
    public delegate TrackingObject GetTrackObject ();
    public static List<GetTrackObject> TrackedLists = new List<GetTrackObject>();

    public static void Register (GetTrackObject trackobject)
    {
        TrackedLists.Add(trackobject);
    }
}

public class TrackingObject
{
    object collection;
    Type T;
    Type K;
    Type V;

    public TrackingObject (object o, Type t, Type k, Type v)
    {
        collection = o;
        T = t;
        K = k;
        V = v;
    }
}

class TrackList<T> : List<T>
{
    public string Name = null;
    public int ItemCount;
    public int AvgSize;
    public int Size;

    public TrackList (string name, byte avgsize)
    {
        this.Name = name;
        this.AvgSize = avgsize;
        this.ItemCount = this.Count;
        this.Size = this.Count * this.AvgSize;

        Tracking.Register(this.GetTrackObject);
    }

    public TrackingObject GetTrackObject ()
    {
        TrackingObject TO = new TrackingObject(this, typeof(T), null, null);
        return TO;
    }
}

public static void Main ()
{
    foreach (Tracking.GetTrackObject method in Tracking.TrackedLists)
    { }
}

Answer 1

您没有将对象存储在列表中，而是存储要在列表中调用（运行）的方法。

一个选项是调用您的方法来获得结果。

public static void Main ()
{
    foreach (Tracking.GetTrackObject method in Tracking.TrackedLists)
    {
        object trackedObject = method();
    }
}

或者，您可以使列表成为对象列表，并在Register方法中调用该方法（并将结果存储在列表中）。

如何访问委托内的对象

1 个答案: