linq排序之 根据文本 A-001-002-003 这种类型进行分割排序 空值放于最后

Posted 2020-09-09

调用

1   List<string> data = new List<string>() {
2                 "D-001-001-001","A-001-004-001","A-001-002-001",
3                 "A-002-001-001", "F-004-001-001", "A-003-001-001",
4                 "A-004-001-004","A-041-0401-031","" };
5             var gf = (from e in data select e).OrderBy(x => x, new AlphaNumericComparer()).ToList();

 

比较器

 1   public class AlphaNumericComparer : IComparer<string>
 2     {
 3         public int Compare(string first, string second)
 4         {
 5              int firstNumber, secondNumber;//定义数值类型返回值
 6             if (string.IsNullOrEmpty(first))
 7             {
 8                 return -1;
 9             }
10             if (string.IsNullOrEmpty(second))
11             {
12                 return -1;
13             }
14             //分割字符串
15             string[] firstArray = first.Split(‘-‘);
16             string[] secondArray = second.Split(‘-‘);
17             List<int> intArray = new List<int>();
18             //记录比较结果
19             for (int i = 0; i < firstArray.Length; i++)
20             {
21                 bool firstIsNumber = int.TryParse(firstArray[i], out firstNumber);
22                 bool secondIsNumber = int.TryParse(secondArray[i], out secondNumber);
23                 if (firstIsNumber && secondIsNumber)
24                 {
25                     //数字比较
26                     intArray.Add(firstNumber.CompareTo(secondNumber));
27                 }
28                 else {
29                     //文本比较
30                     intArray.Add(firstArray[i].CompareTo(secondArray[i]));
31                 }
32             }
33             intArray.Reverse();//从末位开始计算差值
34             int val = 0;
35             //获取差值占比
36             for (int i = 0; i < intArray.Count; i++)
37             {
38                 val += intArray[i] * (i+1) * 10;
39             }
40             return val;
41         }
42     }

效果图: