用正则验证字符串格式，形如:A)XXX B)XXXX C)XXX

今天遇到个小功能，要验证某个英文选项是否正确，例如：A)accumulate B)circling C)communities D)competition E)domestic F)financially G)formally H)gather I)households J)recession K)reported L)reviewed M)serves N)surrounding O)survive

要求：1.必须按顺序排下来,ABCD....

　　　2.选项后代英文)

符合格式则返回true,不符合则为false

想了想，还是用正则先分成一个字符串数组，每个元素即每个单选项，所以就顺手写了下，发现很简单也蛮有趣的：

 1 using System;
 2 using System.Collections.Generic;
 3 using System.Linq;
 4 using System.Text;
 5 using System.Text.RegularExpressions;
 6 
 7 namespace ConsoleApplication1
 8 {
 9     class Program
10     {
11         static void Main(string[] args)
12         {
13             Console.WriteLine(Check(@"A)accumulate B)circling C)communities  D)competition  E)domestic 
14                                       F)financially G)formally  H)gather  I)households  J)recession  "));
15             Console.WriteLine(Check(@"A|accumulate B)circling C)communities  D)competition"));
16             Console.WriteLine(Check(@"A)accumulate C)communities  D)competition"));
17             Console.WriteLine(Check(@"A|accumulate"));
18             Console.WriteLine(Check(@""));
19 
20             Console.Read();
21 
22             //输出结果
23             //true
24             //false
25             //false
26             //false
27             //false
28         }
29 
30         public static bool Check(string options)
31         {
32             MatchCollection mc = Regex.Matches(options,@"[A-Z])[^A-Z]*");  //匹配A)XXX，直到下一个A)
33             //没匹配到，直接返回false
34             if (mc.Count == 0)
35             {
36                 return false;
37             }
38             //匹配到，继续检验
39             else
40             {
41                 char c = 'A';
42                 string bracket = ")";
43                 foreach (Match option in mc)
44                 {
45                     //形如A)
46                     string tmp = c + bracket;   
47                     if (!option.Value.Contains(tmp))
48                         return false;
49                     //A自增为B
50                     c++;
51                 }
52                 return true;
53             }
54             
55         }
56     }
57 }

务必引用c#的正则库函数：  using System.Text.RegularExpressions;