zoukankan      html  css  js  c++  java
  • Linq多集合连接

      class Program
        {
            static void Main(string[] args)
            {
                List<Test1> list1 = new List<Test1>();
                List<Test2> list2 = new List<Test2>();
                List<Test3> list3 = new List<Test3>();
    
                list1.Add(new Test1()
                {
                     Age1 = 30,
                      Name = "30Name"
                });
                list1.Add(new Test1()
                {
                    Age1 = 40,
                    Name = "30Name"
                });
    
                list2.Add(new Test2()
                {
                    Age2 = 30,
                    Name = "30Name2"
                });
                list2.Add(new Test2()
                {
                    Age2 = 40,
                    Name = "30Name2"
                });
    
                list3.Add(new Test3()
                {
                    Age3 = 30,
                    Name = "30Name3"
                });
                list3.Add(new Test3()
                {
                    Age3 = 40,
                    Name = "30Name3"
                });
    
                var end = (from a in list1
                           join b in list2 on a.Age1 equals b.Age2
                           join cc in list3 on a.Age1 equals cc.Age3
                           select new Test3()
                           {
                               Age3 = a.Age1,
                               Name1 = a.Name,
                               Name2 = b.Name,
                               Name3 = cc.Name,
    
                           }).ToList();
                Console.WriteLine( 0 );
            }
        }



    public class Test1
    {
    public int Age1 { get; set; }
    public string Name { get; set; }
    }
    public class Test2
    {
    public int Age2 { get; set; }
    public string Name { get; set; }
    }
    public class Test3
    {
    public int Age3 { get; set; }
    public string Name { get; set; }

    public string Name1 { get; set; }
    public string Name2 { get; set; }
    public string Name3 { get; set; }
    }

      

  • 相关阅读:
    CSS——半透明
    CSS——dispaly、overflow、visibility、opacity
    html——特例
    CSS——◇demo
    html——ico
    JS——函数
    JS——数组
    JS——for
    JS——i++与++i
    JS——三元表达式
  • 原文地址:https://www.cnblogs.com/SHa-Jazy/p/15411342.html
Copyright © 2011-2022 走看看