说明:
using System; using System.Collections.Generic; using System.Linq; namespace JsonTest { public class Program { static void Main(string[] args) { List<People> list = new List<People>(); People temp = new People() { Name = "小明", Age = 19 }; list.Add(new People() { Name = "小明",Age=19 }); list.Add(new People() { Name = "小红", Age = 19 }); list.Add(new People() { Name = "小明", Age = 19 }); List<People> DistinctList = list.DistinctBy(x=> (x.Name,x.Age)).ToList(); Console.Read(); } public string GetName(People obj) { return obj.Name; } } public static class Test { /// <summary> /// 为集合去除重复 /// </summary> /// <typeparam name="TSource">集合类型</typeparam> /// <typeparam name="TKey">根据xx标识去重</typeparam> /// <param name="source">待去重的集合</param> /// <param name="keySelector">去重的标识(可理解为GroupBy的key)</param> /// <returns></returns> public static IEnumerable<TSource> DistinctBy<TSource, TKey>(this IEnumerable<TSource> source, Func<TSource, TKey> keySelector) { //创建一个 TKey类型的 HashSet集合 var seenKeys = new HashSet<TKey>(); //循环待去重的数组 foreach (TSource element in source) { //使用 Hash集合的不能添加重复对象的特性,来判读是否重复(if能添加成功,则说明当前集合内数据未重复) if (seenKeys.Add(keySelector(element))) { yield return element; } } } } /// <summary> /// 测试类 /// </summary> public class People { public string Name { get; set; } public int Age { get; set; } } }