动态构建OrderBy的Lambda表达式

最新推荐文章于 2024-04-01 13:50:06 发布

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#lambda #list #string #class #float #c

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本文展示了一个使用C#编写的简单程序，该程序创建了一个员工列表并按ID、姓名、身高及薪资进行排序。通过具体的代码实现，读者可以了解如何在C#中对对象列表进行排序。

public class Employee { public int ID { get; set; } public string Name { get; set; } public decimal Pay { get; set; } public float Height { get; set; } }

class Program { static void Main(string[] args) { IList<Employee> list = new List<Employee>(); list.Add(new Employee() { ID = 2, Name = "D", Height = 175.50f, Pay = 6000.45m }); list.Add(new Employee() { ID = 4, Name = "A", Height = 178.00f, Pay = 4500.8m }); list.Add(new Employee() { ID = 5, Name = "C", Height = 173.54f, Pay = 7500.11m }); list.Add(new Employee() { ID = 1, Name = "B", Height = 180.15f, Pay = 8000.2m }); list.Add(new Employee() { ID = 3, Name = "E", Height = 182.3f, Pay = 5500.70m }); Console.WriteLine("输出List （ID排序前）"); StringBuilder builder = new StringBuilder(); foreach (var i in list) { builder.AppendFormat("{0},", i.ID); } Console.WriteLine(builder.ToString().TrimEnd(',')); Console.WriteLine(""); Console.WriteLine("输出List （ID排序后）"); list = IListOrderBy<Employee>(list, "ID"); builder.Length = 0; foreach (var i in list) { builder.AppendFormat("{0},", i.ID); } Console.WriteLine(builder.ToString().TrimEnd(',')); Console.WriteLine(""); Console.WriteLine("输出List （Name排序前）"); builder.Length = 0; foreach (var i in list) { builder.AppendFormat("{0},", i.Name); } Console.WriteLine(builder.ToString().TrimEnd(',')); Console.WriteLine(""); Console.WriteLine("输出List （Name排序后）"); list = IListOrderBy<Employee>(list, "Name"); builder.Length = 0; foreach (var i in list) { builder.AppendFormat("{0},", i.Name); } Console.WriteLine(builder.ToString().TrimEnd(',')); Console.WriteLine(""); var tempList = IListOrderBy<Employee>(list, "Height"); Console.WriteLine("输出List （Height排序前）/t/t输出List （Height排序后）"); for (int i = 0, len = list.Count; i < len; i++) { Console.WriteLine("/t{0}/t/t/t/t/t{1}", list[i].Height, tempList[i].Height); } Console.WriteLine(""); tempList = IListOrderBy<Employee>(list, "Pay"); Console.WriteLine("输出List （Pay排序前）/t/t输出List （Pay排序后）"); for (int i = 0, len = list.Count; i < len; i++) { Console.WriteLine("/t{0}/t/t/t/t{1}", list[i].Pay, tempList[i].Pay); } }