深層克隆如果列表項有另一個列表

Question

我試圖用克隆擴展克隆泛型列表。

List<Vehicle> newList = currentVehicleList.Clone().ToList(); 

public static IList<T> Clone<T>(this IList<T> listToClone) where T : ICloneable 
{ 
    return listToClone.Select(item => (T)item.Clone()).ToList(); 
} 

我有車對象實現ICloneable

public class Vehicle : ICloneable 
{ 
    [Key] 
    public int VehicleId { get; set; } 
    public string Plaka { get; set; } 
    public double Volume { get; set; } 
    public double FilledVolume { get; set; } 
    public double DepartureTime { get; set; } 
    public double IdleVolume 
    { 
     get { return this.Volume - this.FilledVolume; } 
     set { } 
    } 
    public double FilledWeight { get; set; } 
    public double IdleWeight { 
     get { return this.WeightCapacity - this.FilledWeight; } 
     set{} 
    } 
    public decimal ConstantCost { get; set; } 
    public string VehicleType { get; set; } 
    public string Model { get; set; } 
    public bool IsRent { get; set; } 
    public double AvgVelocity { get; set; } 
    public decimal CostPerKilometer { get; set; } 
    public double WeightCapacity { get; set; } 
    public bool InProgress { get; set; } 
    public List<Order> FilledOrders { get; set; } 

    public object Clone() 
    { 
     return this.MemberwiseClone(); 
    } 
} 

擴展克隆我的列表，但車輛目標具有FilledOrders物業類型List<Order>所以克隆不爲FilledOrders列表執行。

public class Order : ICloneable 
{ 
    [Key] 
    public int OrderId { get; set; } 
    public Customer Customer { get; set; } 
    public bool IsTwoWayDirection { get; set; } 
    public DateTime DeliveryDate { get; set; } 
    public Dictionary<Product,int> OrderedProducts { get; set; } 
    public Dictionary<Product, int> ReOrderedProducts { get; set; } 
    public Double DemandTotalWeigth { get; set; } 
    public Double DemandTotalVolume { get; set; } 
    public Double PickupTotalWeigth { get; set; } 
    public Double PickupTotalVolume { get; set; } 
    public double EarliestArrivedTime { get; set; } 
    public double ArrivedTime { get; set; } 
    //TODO :Timespana cevrilecek 
    public Double AcceptStartDate { get; set; } 
    public Double AcceptEndDate { get; set; } 
    public Double ServiceTime { get; set; } 
    // 

    public object Clone() 
    { 
     return this.MemberwiseClone(); 
    } 
} 

如果列表項有另一個列表，克隆的解決方案是什麼？

Answer 1

在Vehicle類，只是擴展Clone()功能克隆名單：

public object Clone() 
{ 
    Vehicle clone = this.MemberwiseClone(); 
    List<Order> clonedOrders = new List<Order>(); 
    foreach (Order order in this.FilledOrders) 
     clonedOrders.Add((Order)order.Clone()); 
    clone.FilledOrders = clonedOrders; 
    return clone; 
} 

這是實現IClonable的整點，畢竟。否則，你可以在任何情況下致電MemberwiseClone()。

順便說一句，Order類中的字典對象也不會被克隆，因爲它們也是引用類型。要解決這個問題，其原理是相同的：展開Clone()函數Order並在那裏手動創建它們的副本。如果需要克隆即使是那個0123'項目，也要在Product類別中執行IClonable，並在那裏執行相同操作。

只要沒有循環引用，您可以繼續執行IClonable並修復Clone()函數中的引用類型。