本文中的方法旨在解决通用的问题，非常注重效率的地方，还应该针对具体的类去写排序方法。
废话不多说，直接上代码
具体使用场景：
- 要排序的类
1 public class bb
2 {
3 public aa a { get; set; }
4 }
5
6 public class aa
7 {
8 public string index { get; set; }
9 public string name { get; set; }
10
11 public aa(string index, string name)
12 {
13 this.index = index;
14 this.name = name;
15 }
16 }
- 使用CommentComparer类排序
1 List<bb> list = new List<bb>()
2 {
3 new bb(){a = new aa("13", "35")},
4 new bb(){a = new aa("14", "35")},
5 new bb(){a = new aa("12", "35")},
6 new bb(){a = new aa("14", "12")},
7 };
8
9 CommentComparer<bb> comparer = new CommentComparer<bb>();
10 //comparer.IsAsc = true;
11 //comparer.IsProperty = true;
12 comparer.AddField("a.index");
13 comparer.AddField("a.name");
14
15 list.Sort(comparer);
- 结果
CommentComparer类具体实现
1 /// <summary> 2 /// 排序类 3 /// </summary> 4 /// <typeparam name="T"></typeparam> 5 public class CommentComparer<T> : IComparer<T> 6 { 7 /// <summary> 8 /// 字段列表 9 /// </summary> 10 private List<string> fieldList; 11 12 /// <summary> 13 /// 排序字段序号 14 /// </summary> 15 private int index = 0; 16 17 /// <summary> 18 /// 正序 19 /// </summary> 20 public bool IsAsc { get; set; } 21 22 /// <summary> 23 /// 使用字段的属性排序 24 /// <para>False:使用字段排序</para> 25 /// </summary> 26 public bool IsProperty { get; set; } 27 28 public CommentComparer() 29 { 30 fieldList = new List<string>(); 31 IsAsc = true; 32 IsProperty = true; 33 index = 0; 34 } 35 36 /// <summary> 37 /// 添加排序使用的字段 38 /// </summary> 39 /// <param name="fieldName"></param> 40 public void AddField(string fieldName) 41 { 42 fieldList.Add(fieldName); 43 } 44 45 public int Compare(T x, T y) 46 { 47 if (x == null) 48 { 49 if (y == null) 50 { 51 return 0; 52 } 53 54 return 1; 55 56 } 57 if (y == null) 58 { 59 return -1; 60 } 61 62 int result = -1; 63 64 if (fieldList.Count < 1) 65 { throw new FormatException("请添加排序所使用的字段!"); } 66 if (index == 0 && !IsAsc) 67 { 68 T temp; 69 temp = y; 70 y = x; 71 x = temp; 72 } 73 74 string[] field = fieldList[index].Split('.'); 75 76 dynamic p1 = GetValue<T>(x, field, 0); 77 dynamic p2 = GetValue<T>(y, field, 0); 78 79 result = Comparer<string>.Default.Compare(p1, p2); 80 if (result == 0) 81 { 82 index++; 83 if (fieldList.Count > index) 84 { result = Compare(x, y); } 85 index--; 86 } 87 return result; 88 } 89 90 /// <summary> 91 /// 获取属性值 92 /// </summary> 93 /// <typeparam name="T"></typeparam> 94 /// <param name="obj"></param> 95 /// <param name="field"></param> 96 /// <param name="i"></param> 97 /// <returns></returns> 98 private dynamic GetValue<T>(T obj, string[] field, int i) 99 { 100 dynamic result; 101 102 Type t = typeof(T); 103 104 if (IsProperty) 105 { 106 PropertyInfo propertyInfo = t.GetProperty(field[i]); 107 result = propertyInfo.GetValue(obj, null); 108 } 109 else 110 { 111 FieldInfo fieldInfo = t.GetField(field[i]); 112 result = fieldInfo.GetValue(obj); 113 } 114 115 if (i < field.Length - 1) 116 { 117 result = GetValue(result, field, ++i); 118 } 119 return result; 120 } 121 }