运用Linq，将List<T> 转换为 Dictionary<T Key,T Value>

即：List<T>  ToDictionary<T Key,T Value>

 

废话不说，看代码：

示例代码：按照性别分类

class Program    {        public class Student        {            public string Name { get; set; }            public int Age { get; set; }            public int Sex { get; set; }        }                static void Main(string[] args)        {            List
     
       lstStudent = new List
      
       ();            lstStudent.Add(new Student { Name = "A1", Age = 17, Sex = 0 });            lstStudent.Add(new Student { Name = "A2", Age = 19, Sex = 1 });            lstStudent.Add(new Student { Name = "A3", Age = 17, Sex = 1 });            lstStudent.Add(new Student { Name = "A4", Age = 19, Sex = 0 });            lstStudent.Add(new Student { Name = "A5", Age = 18, Sex = 1 });            lstStudent.Add(new Student { Name = "A6", Age = 18, Sex = 0 });            lstStudent.Add(new Student { Name = "A7", Age = 18, Sex = 1 });            lstStudent.Add(new Student { Name = "A8", Age = 19, Sex = 0 });            lstStudent.Add(new Student { Name = "A9", Age = 19, Sex = 0 });            var dicStudent = lstStudent.GroupBy(p => p.Sex).ToDictionary(p => p.Key, p => p.ToList());            foreach (var dic in dicStudent)            {                Console.WriteLine("Key:{0}", dic.Key);                foreach (var stu in dic.Value)                {                    Console.WriteLine("Name:{0},Age:{1}", stu.Name, stu.Sex.ToString());                }            }            Console.ReadKey();        }    }
      
     

实际运行结果：

Key:0Name:A1,Age:0Name:A4,Age:0Name:A6,Age:0Name:A8,Age:0Name:A9,Age:0Key:1Name:A2,Age:1Name:A3,Age:1Name:A5,Age:1Name:A7,Age:1

 

轻松利用linQ