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：

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Text.RegularExpressions;

namespace ConsoleApplication1
{
    class Program
    {
        static void Main(string[] args)
        {
            Console.WriteLine(Check(@"A)accumulate B)circling C)communities  D)competition  E)domestic 
                                      F)financially G)formally  H)gather  I)households  J)recession  "));
            Console.WriteLine(Check(@"A|accumulate B)circling C)communities  D)competition"));
            Console.WriteLine(Check(@"A)accumulate C)communities  D)competition"));
            Console.WriteLine(Check(@"A|accumulate"));
            Console.WriteLine(Check(@""));

            Console.Read();

            //输出结果
            //true
            //false
            //false
            //false
            //false
        }

        public static bool Check(string options)
        {
            MatchCollection mc = Regex.Matches(options,@"[A-Z])[^A-Z]*");  //匹配A)XXX，直到下一个A)
            //没匹配到，直接返回false
            if (mc.Count == 0)
            {
                return false;
            }
            //匹配到，继续检验
            else
            {
                char c = 'A';
                string bracket = ")";
                foreach (Match option in mc)
                {
                    //形如A)
                    string tmp = c + bracket;   
                    if (!option.Value.Contains(tmp))
                        return false;
                    //A自增为B
                    c++;
                }
                return true;
            }
            
        }
    }
}

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