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C#中Dictionary<TKey,TValue>排序方式的实现

运维开发网 https://www.qedev.com 2021-02-26 12:11 出处:网络 作者: 浮海扬尘
自定义类: using System; using System.Collections.Generic; using System.Linq; using System.Text; using System.Threading.Tasks;

自定义类:

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace CSharp中Dictionary排序方式
{
  [Serializable]
  public class CustmonizedClass
  {
    public string stuName { get; set; }

    public int stuAge { get; set; }

    public string stuSex { get; set; }

    public double stuScore { get; set; }
    
  }
}

Dictionary<int,自定义类>

按照Dictionary的Key值 升序排序(OrderBy)、降序排序(OrderByDescending):

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace CSharp中Dictionary排序方式
{
   public class Program
  {
    static void Main(string[] args)
    {
      CustmonizedClass cn1 = new CustmonizedClass();
      cn1.stuName = "张三";
      cn1.stuAge = 18;
      cn1.stuSex = "男";
      cn1.stuScore = 89.5;

      CustmonizedClass cn2 = new CustmonizedClass();
      cn2.stuName = "李四";
      cn2.stuAge = 19;
      cn2.stuSex = "男";
      cn2.stuScore = 88.5;


      CustmonizedClass cn3 = new CustmonizedClass();
      cn3.stu编程客栈Name = "王五";
      cn3.stuAge = 17;
      cn3.stuSex = "女";
      cn3.stuScore = 89.5;

      Dictionary<int, CustmonizedClass> dic1 = new Dictionary<int, CustmonizedClass>();
      dic1.Add(3, cn1);
      dic1.Add(1, cn2);
      dic1.Add(2, cn3);
      //上面dic1.Add()故意不按照顺序

      Dictionary<int, CustmonizedClass> dic1_SortedByKey = dic1.OrderBy(p=>p.Key).ToDictionary(p => p.Key, o => o.Value);
      

      foreach (KeyValuePair<int, CustmonizedClass> item in dic1_SortedByKey) 
      {
        Console.WriteLine("Key:{0} ; Value: name:{1}, age:{2}, sex:{3}, score:{4} ",
          item.Key,item.Value.stuName,item.Value.stuAge,item.Value.stuSex,item.Value.stuScore);
      }
      Console.ReadLine();            
    }
  }
}
Dictionary<int, CustmonizedClass> dic1_SortedByKey = dic1.OrderBy(p=>p.Key).ToDictionary(p => p.Key, o => o.Value);

结果截图:

C#中Dictionary&lt;TKey,TValue&gt;排序方式的实现

降序排序:

Dictionary<int, CustmonizedClass> dic1_SortedByKey = dic1.OrderByDescending(p => p.Key).ToDictionary(p => p.Key, o => o.Value);

结果截图:

C#中Dictionary&lt;TKey,TValue&gt;排序方式的实现

按照Dictionary的Value值的某个属性 升序排序(OrderBy)、降序排序(OrderByDescending):

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace CSharp中Dictionary排序方式
{
   public class Program
  {
    static void Main(string[] args)
    {
      CustmonizedClass cn1 = new CustmonizedClass();
      cn1.stuName = "张三";
      cn1.stuAge = 18;
      cn1.stuSex = "男";
      cn1.stuScore = 89.5;

      CustmonizedClass cn2 = new CustmonizedClass();
      cn2.stuName = "李四";
      cn2.stuAge = 19;
      cn2.stuSex = "男";
      cn2.stuScore = 88.5;


      CustmonizedClass cn3 = new CustmonizedClass();
      cn3.stuName = "王五";
      cn3.stuAge = 17;
      cn3.stuSex = "女";
      cn3.stuScore = 89.5;

      Dictionary<int, CustmonizedClass> dic1 = new Dictionary<int, CustmonizedClass>();
      dic1.Add(3, cn1);
      dic1.Add(1, cn2);
      dic1.Add(2, cn3);
      //上面dic1.Add()故意不按照顺序
      //Key升序
      //Dictionary<int, CustmonizedClass> dic1_SortedByKey = dic1.OrderBy(p=>p.Key).ToDictionary(p => p.Key, o => o.Value);
      //Key降序
      //Dictionary<int, CustmonizedClass> dic1_SortedByKey = dic1.OrderByDescending(p => p.Key)编程客栈.ToDictionary(p => p.Key, o => o.Value);
      //Value中stuAge属性
      Dictionary<int, CustmonizedClass> dic1_SortedByKey = dic1.OrderBy(o => o.Value.stuAge).ToDictionary(p => p.Key, o => o.Value);

      foreach (KeyValuePair<int, CustmonizedClass> item in dic1_SortedByKey) 
      {
        Console.WriteLine("Key:{0} ; Value: name:{1}, age:{2}, sex:{3}, score:{4} ",
          item.Key,item.Value.stuName,item.Value.stuAge,item.Value.stuSex,item.Value.stuScore);
      }
      Console.ReadLine();            
    }
  }
}

关键修改这句:

Dictionary<int, CustmonizedClass> dic1_SortedByKey = dic1.OrderBy(o => o.Value.stuAge).ToDictionary(p=>p.Key,o=>o.Value);

结果截图:

C#中Dictionary&lt;TKey,TValue&gt;排序方式的实现

混合排序:类似EXCEL中先按第一列升序、再按第3列的升序……

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace CSharp中Dictionary排序方式
{
   public class Program
  {
    static void Main(string[] args)
    {
      CustmonizedClass cn1 = new CustmonizedClass();
      cn1.stuName = "张三";
      cn1.stuAge = 18;
      cn1.stuSex = "男";
      cn1.stuScore = 89.5;
编程客栈
      CustmonizedClass cn2 = new CustmonizedClass();
      cn2.stuName = "李四";
      cn2.stuAge = 19;
      cn2.stuSex = "男";
      cn2.stuScore = 88.5;


      CustmonizedClass cn3 = new CustmonizedClass();
      cn3.stuName = "王五";
      cn3.stuAge = 17;
      cn3.stuSex = "女";
      cn3.stuScore = 89.5;

      Dictionary<int, CustmonizedClass> dic1 = new Dictionary<int, CustmonizedClass>();
      dic1.Add(3, cn1);
      dic1.Add(1, cn2);
      dic1.Add(2, cn3);
      //上面dic1.Add()故意不按照顺序
      //Key升序
      //Dictionary<int, CustmonizedClass> dic1_SortedByKey = dic1.OrderBy(p=>p.Key).ToDictionary(p => p.Key, o => o.Value);
      //Key降序
      //Dictionary<int, CustmonizedClass> dic1_SortedByKey = dic1.OrderByDescending(p => p.Key).ToDictionary(p => p.Key, o => o.Value);
      //Value中stuAge属性
      //Dictionary<int, CustmonizedClass> dic1_SortedByKey = dic1.OrderBy(o => o.Value.stuAge).ToDictionary(p => p.Key, o => o.Value);
      //混合排序 等同编程客栈于下列的linq语句
      //Dictionary<int, CustmonizedClass> dic1_SortedByKey = dic1.OrderBy(o => o.Value.stuScore).ThenByDescending(o=>o.Value.stuAge).ToDictionary(p=>p.Key,o=>o.Value);

      //linq语句
      var dic1_SortedByKey = from n in dic1

             orderby n.Value.stuScore, n.Value.stuAge descending

             select n;

      foreach (KeyValuePair<int, CustmonizedClass> item in dic1_SortedByKey) 
      {
        Console.WriteLine("Key:{0} ; Value: name:{1}, age:{2}, sex:{3}, score:{4} ",
          ihttp://www.cppcns.comtem.Key,item.Value.stuName,item.Value.stuAge,item.Value.stuSex,item.Value.stuScore);
      }
      Console.ReadLine();            
    }
  }
}
Dictionary<int, CustmonizedClass> dic1_SortedByKey = dic1.OrderBy(o => o.Value.stuScore).ThenByDescending(o=>o.Value.stuAge).ToDictionary(p=>p.Key,o=>o.Value);

等同于linq语句:

var dic1_SortedByKey = from n in dic1

orderby n.Value.stuScore, n.Value.stuAge descending

select n;

结果截图:

C#中Dictionary&lt;TKey,TValue&gt;排序方式的实现

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