Question

使用这样的父子设置：父母有子列表。

public sealed class Parent
{
    public Parent(DateTime recordTime, int randomValue, bool isAccepted, List<Child> children)
    {
        RecordTime = recordTime;
        RandomValue = randomValue;
        IsAccepted = isAccepted;
        Children = adjustments;
    }

    public DateTime RecordTime { get; private set; }
    public int RandomValue { get; private set; }
    public bool IsAccepted { get; private set; }
    public List<Child> Children { get; private set; }
}

public sealed class Child
{
    public Child(int randomChildValue, bool isPositive, Parent parent)
    {
        RandomChildValue = randomChildValue;
        IsPositive = isPositive;
        Parent = parent;
    }

    public int RandomChildValue { get; private set; }
    public bool IsPositive { get; private set; }
    public Parent Parent { get; private set; }
}

使用LINQ Select扩展方法根据其他集合投影父级和子级。如何将父项传递给子项。我知道我可以使用.Select((x,index) => new Parent....获取父级索引在下面的linq语句中我传递null，但是可以传递父级吗？

var parentCollection = neighborCollection.Select(x => new Parent(x.Time, (int)x.ItemsProcessed, x.UserAccepted, 
                          x.subCollection.Select(y => new Child((int)y.Sub, y.IsPositive, null)).ToList()));

Answer 1

只需让您的父构造函数将自己指定为每个子项的父项。但是，由于Parent是私有的，因此您必须在父构造函数

中重新生成子列表

Children = children.Select(c => new Child(c.RandomChildValue, c.IsPositive, this)).ToList()

linq使用私有设置器可以实现这一点吗？

1 个答案: