lambda表达式 list排序

淡淡的烟草味﹌ 2022-12-25 15:56 155阅读 0赞

/// <summary>
            /// 时间排序
            /// </summary>
            public  static   void timesort()
            { 
                
                    List<People> ss = new List<People> {  };
                    ss.Add(new People() {  name = "aa", CPU = 12, Memory = 6, DTime = new DateTime(2020, 1, 1, 21, 21, 21) });
                    ss.Add(new People() {  name = "bb", CPU = 34, Memory = 1, DTime = new DateTime(2020, 1, 1, 21, 21, 24) });
                    ss.Add(new People() {  name = "cc", CPU = 61, Memory = 3, DTime = new DateTime(2020, 1, 1, 21, 21, 23) });
                    ss.Add(new People() {  name = "cc", CPU = 61, Memory = 3, DTime = new DateTime(2020, 1, 1, 21, 21, 23) });
                    ss.Add(new People() {  name = "cc", CPU = 61, Memory = 3, DTime = new DateTime(2020, 1, 1, 21, 21, 24) });
                    ss.Add(new People() {  name = "cc", CPU = 61, Memory = 3, DTime = new DateTime(2020, 1, 1, 21, 21, 25) });
                    ss.Add(new People() {  name = "cc", CPU = 61, Memory = 3, DTime = new DateTime(2020, 1, 1, 21, 21, 27) });
                    ss.Add(new People() {  name = "cc", CPU = 61, Memory = 3, DTime = new DateTime(2020, 1, 1, 21, 21, 25) });
                    ss.Add(new People() {  name = "cc", CPU = 61, Memory = 3, DTime = new DateTime(2020, 1, 1, 21, 21, 29) });
                    ss.Add(new People() {  name = "cc", CPU = 61, Memory = 3, DTime = new DateTime(2020, 1, 1, 21, 21, 27) });
                    ss.Add(new People() {  name = "cc", CPU = 61, Memory = 3, DTime = new DateTime(2020, 1, 1, 21, 21, 28) });
                    ss.Add(new People() {  name = "cc", CPU = 61, Memory = 3, DTime = new DateTime(2020, 1, 1, 21, 21, 29) });
                    ss.Add(new People() {  name = "cc", CPU = 61, Memory = 3, DTime = new DateTime(2020, 1, 1, 21, 21, 23) });
                    ss.Add(new People() {  name = "cc", CPU = 61, Memory = 3, DTime = new DateTime(2020, 1, 1, 21, 21, 26) });
                    ss.Add(new People() {  name = "cc", CPU = 61, Memory = 3, DTime = new DateTime(2020, 1, 1, 21, 21, 23) });
                    ss.Add(new People() {  name = "cc", CPU = 61, Memory = 3, DTime = new DateTime(2020, 1, 1, 21, 21, 22) });
                    ss.Add(new People() {  name = "cc", CPU = 61, Memory = 3, DTime = new DateTime(2020, 1, 1, 21, 21, 28) });
                    ss.Add(new People() {  name = "cc", CPU = 61, Memory = 3, DTime = new DateTime(2020, 1, 1, 21, 21, 24) });
                    ss.Add(new People() {  name = "cc", CPU = 61, Memory = 3, DTime = new DateTime(2020, 1, 1, 21, 21, 22) });
    
                    ss.Sort((x, y) => y.Memory.CompareTo(x.Memory));//Memory字段升序排列
                                                                    //ss.Sort((x, y) => x.Memory.CompareTo(y.Memory));//降序排列
    
                    ss.Sort((x, y) => DateTime.Compare(y.DTime, x.DTime));//时间排序（重前到后）
                    Console.WriteLine("重前到后：");
                    foreach (People item in ss)
                    { 
                        Console.WriteLine(item.GetStateStr());
                    }
                ss.Sort((x, y) => DateTime.Compare(x.DTime, y.DTime));//时间排序（重后到前）
                Console.WriteLine("重后到前：");
                foreach (People item in ss)
                { 
                    Console.WriteLine(item.GetStateStr());
                }
    
            }

调用：

static void Main(string[] args)
            { 
      #region lamba时间排序
                timesort();
                #endregion
                }

输出结果：

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80NTkzMjE1Nw_size_16_color_FFFFFF_t_70]

[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80NTkzMjE1Nw_size_16_color_FFFFFF_t_70]: /images/20221120/e57a94660cbd4cf9b2288597ca6d232f.png