C#中Dictionary排序方式
作者：互联网
转载自：https://www.cnblogs.com/5696-an/p/5625142.html
自定义类：
1 https://files.cnblogs.com/files/xunhanliu/d3.v4.js
2
3 using System;
4 using System.Collections.Generic;
5 using System.Linq;
6 using System.Text;
7 using System.Threading.Tasks;
8
9 namespace CSharp中Dictionary排序方式
10 {
11 [Serializable]
12 public class CustmonizedClass
13 {
14 public string stuＮame { get; set; }
15
16 public int stuAge { get; set; }
17
18 public string stuSex { get; set; }
19
20 public double stuScore { get; set; }
21
22 }
23 }
Dictionary<int,自定义类>
按照Dictionary的Key值 升序排序(OrderBy)、降序排序(OrderByDescending)：
1 using System;
2 using System.Collections.Generic;
3 using System.Linq;
4 using System.Text;
5 using System.Threading.Tasks;
6
7 namespace CSharp中Dictionary排序方式
8 {
9 public class Program
10 {
11 static void Main(string[] args)
12 {
13 CustmonizedClass cn1 = new CustmonizedClass();
14 cn1.stuＮame = "张三";
15 cn1.stuAge = 18;
16 cn1.stuSex = "男";
17 cn1.stuScore = 89.5;
18
19 CustmonizedClass cn2 = new CustmonizedClass();
20 cn2.stuＮame = "李四";
21 cn2.stuAge = 19;
22 cn2.stuSex = "男";
23 cn2.stuScore = 88.5;
24
25
26 CustmonizedClass cn3 = new CustmonizedClass();
27 cn3.stuＮame = "王五";
28 cn3.stuAge = 17;
29 cn3.stuSex = "女";
30 cn3.stuScore = 89.5;
31
32 Dictionary<int, CustmonizedClass> dic1 = new Dictionary<int, CustmonizedClass>();
33 dic1.Add(3, cn1);
34 dic1.Add(1, cn2);
35 dic1.Add(2, cn3);
36 //上面dic1.Add()故意不按照顺序
37
38 Dictionary<int, CustmonizedClass> dic1_SortedByKey = dic1.OrderBy(p=>p.Key).ToDictionary(p => p.Key, o => o.Value);
39
40
41 foreach (KeyValuePair<int, CustmonizedClass> item in dic1_SortedByKey)
42 {
43 Console.WriteLine("Key:{0} ; Value: name:{1}, age:{2}, sex:{3}, score:{4} ",
44 item.Key,item.Value.stuＮame,item.Value.stuAge,item.Value.stuSex,item.Value.stuScore);
45 }
46 Console.ReadLine();
47 }
48 }
49 }
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)：
1 using System;
2 using System.Collections.Generic;
3 using System.Linq;
4 using System.Text;
5 using System.Threading.Tasks;
6
7 namespace CSharp中Dictionary排序方式
8 {
9 public class Program
10 {
11 static void Main(string[] args)
12 {
13 CustmonizedClass cn1 = new CustmonizedClass();
14 cn1.stuＮame = "张三";
15 cn1.stuAge = 18;
16 cn1.stuSex = "男";
17 cn1.stuScore = 89.5;
18
19 CustmonizedClass cn2 = new CustmonizedClass();
20 cn2.stuＮame = "李四";
21 cn2.stuAge = 19;
22 cn2.stuSex = "男";
23 cn2.stuScore = 88.5;
24
25
26 CustmonizedClass cn3 = new CustmonizedClass();
27 cn3.stuＮame = "王五";
28 cn3.stuAge = 17;
29 cn3.stuSex = "女";
30 cn3.stuScore = 89.5;
31
32 Dictionary<int, CustmonizedClass> dic1 = new Dictionary<int, CustmonizedClass>();
33 dic1.Add(3, cn1);
34 dic1.Add(1, cn2);
35 dic1.Add(2, cn3);
36 //上面dic1.Add()故意不按照顺序
37 //Key升序
38 //Dictionary<int, CustmonizedClass> dic1_SortedByKey = dic1.OrderBy(p=>p.Key).ToDictionary(p => p.Key, o => o.Value);
39 //Key降序
40 //Dictionary<int, CustmonizedClass> dic1_SortedByKey = dic1.OrderByDescending(p => p.Key).ToDictionary(p => p.Key, o => o.Value);
41 //Value中stuAge属性
42 Dictionary<int, CustmonizedClass> dic1_SortedByKey = dic1.OrderBy(o => o.Value.stuAge).ToDictionary(p => p.Key, o => o.Value);
43
44 foreach (KeyValuePair<int, CustmonizedClass> item in dic1_SortedByKey)
45 {
46 Console.WriteLine("Key:{0} ; Value: name:{1}, age:{2}, sex:{3}, score:{4} ",
47 item.Key,item.Value.stuＮame,item.Value.stuAge,item.Value.stuSex,item.Value.stuScore);
48 }
49 Console.ReadLine();
50 }
51 }
52 }
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……
1 using System;
2 using System.Collections.Generic;
3 using System.Linq;
4 using System.Text;
5 using System.Threading.Tasks;
6
7 namespace CSharp中Dictionary排序方式
8 {
9 public class Program
10 {
11 static void Main(string[] args)
12 {
13 CustmonizedClass cn1 = new CustmonizedClass();
14 cn1.stuＮame = "张三";
15 cn1.stuAge = 18;
16 cn1.stuSex = "男";
17 cn1.stuScore = 89.5;
18
19 CustmonizedClass cn2 = new CustmonizedClass();
20 cn2.stuＮame = "李四";
21 cn2.stuAge = 19;
22 cn2.stuSex = "男";
23 cn2.stuScore = 88.5;
24
25
26 CustmonizedClass cn3 = new CustmonizedClass();
27 cn3.stuＮame = "王五";
28 cn3.stuAge = 17;
29 cn3.stuSex = "女";
30 cn3.stuScore = 89.5;
31
32 Dictionary<int, CustmonizedClass> dic1 = new Dictionary<int, CustmonizedClass>();
33 dic1.Add(3, cn1);
34 dic1.Add(1, cn2);
35 dic1.Add(2, cn3);
36 //上面dic1.Add()故意不按照顺序
37 //Key升序
38 //Dictionary<int, CustmonizedClass> dic1_SortedByKey = dic1.OrderBy(p=>p.Key).ToDictionary(p => p.Key, o => o.Value);
39 //Key降序
40 //Dictionary<int, CustmonizedClass> dic1_SortedByKey = dic1.OrderByDescending(p => p.Key).ToDictionary(p => p.Key, o => o.Value);
41 //Value中stuAge属性
42 //Dictionary<int, CustmonizedClass> dic1_SortedByKey = dic1.OrderBy(o => o.Value.stuAge).ToDictionary(p => p.Key, o => o.Value);
43 //混合排序 等同于下列的linq语句
44 //Dictionary<int, CustmonizedClass> dic1_SortedByKey = dic1.OrderBy(o => o.Value.stuScore).ThenByDescending(o=>o.Value.stuAge).ToDictionary(p=>p.Key,o=>o.Value);
45
46 //linq语句
47 var dic1_SortedByKey = from n in dic1
48
49 orderby n.Value.stuScore, n.Value.stuAge descending
50
51 select n;
52
53 foreach (KeyValuePair<int, CustmonizedClass> item in dic1_SortedByKey)
54 {
55 Console.WriteLine("Key:{0} ; Value: name:{1}, age:{2}, sex:{3}, score:{4} ",
56 item.Key,item.Value.stuＮame,item.Value.stuAge,item.Value.stuSex,item.Value.stuScore);
57 }
58 Console.ReadLine();
59 }
60 }
61 }
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：
标签：stuAge,Dictionary,C#,Value,dic1,Key,using,排序 来源： https://www.cnblogs.com/feifeifeisir/p/16358641.html