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;