C#中Dictionary<TKey,TValue>排序方式的实现

编辑: admin 分类: c#语言 发布时间: 2021-11-25 来源:互联网

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 Cu【来源：自由互联：http://www.1234xp.com/meiguo.htmlstmonizedClass
  {
    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.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

      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：

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：

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).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：

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;

      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} ",
          item.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：


到此这篇关于C#中Dictionary<TKey,TValue>排序方式的实现的文章就介绍到这了,更多相关C# Dictionary<TKey,TValue>排序内容请搜索海外IDC网以前的文章或继续浏览下面的相关文章希望大家以后多多支持海外IDC网！

【文章转自：韩国cn2服务器 转载请保留连接】
更多阅读