C＃

Question

我有一个名为input ...

的对象列表

我拿这个列表并过滤它以获得另一个对象列表输出。

我想检查输出列表与输入列表相比是否有任何更改。

列表属于同一类型

Answer 1

var nonintersect = modifiedList.Except(originalList);

你需要通过isActive字段实现comparer

Answer 2

您可以将IEquality Comparer用于此

这是IEquality的通用实现

public class GenericEqualityComparer<T> : IEqualityComparer<T>
{
    private Func<T, T, bool> _equalsFunction;
    private Func<T, int> _hashCodeFunction;

    public GenericEqualityComparer(Func<T, T, bool> equalsFunction, Func<T, int> hashCodeFunction)
    {
        if (equalsFunction == null) throw new ArgumentException();
        if (hashCodeFunction == null) throw new ArgumentException();

        _equalsFunction = equalsFunction;
        _hashCodeFunction = hashCodeFunction;
    }

    public bool Equals(T x, T y)
    {
        return _equalsFunction(x, y);
    }

    public int GetHashCode(T obj)
    {
        return _hashCodeFunction(obj);
    }
}

样本用法

var difference = List1.Except(list2, new GenericEqualityComparer<Product>((x, y) => x.IsActive== y.IsActive && y.Id== y.Id, x => x.ID.GetHashCode()));

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