1 /// <summary>
2 /// 自定义比较器 ZhangQC 2016.11.29
3 /// </summary>
4 /// <typeparam name="T"></typeparam>
5 /// <typeparam name="TV"></typeparam>
6 public class CommonEqualityComparer<T, TV> : IEqualityComparer<T>
7 {
8 private readonly Func<T, TV> _keySelector;
9
10 public CommonEqualityComparer(Func<T, TV> keySelector)
11 {
12 this._keySelector = keySelector;
13 }
14 public bool Equals(T x, T y)
15 {
16 return EqualityComparer<TV>.Default.Equals(_keySelector(x), _keySelector(y));
17 }
18
19 public int GetHashCode(T obj)
20 {
21 return EqualityComparer<TV>.Default.GetHashCode(_keySelector(obj));
22 }
23 }
