c# 怎么实现替换

Question

我有一个string aa=@"2341kj%%1%%h542gf52498t7ertgs%%2%%0e76rts87df6g9dfs956s
sdfsdf%%3%%dgthdfhufdtrfydrtydr%%4%%tydrtydghjgfhjj
dertydertdydrt%%5%%ydert6yudrtyudrtyudyud7f6g"
然后有个
            List<string[]> sList = new List<string[]>();
            string[] str1 = new string[] {"1","aaaaeraa"};
            sList.Add(str1);
            string[] str2 = new string[] { "2", "berb" };
            sList.Add(str2);
            string[] str3 = new string[] { "3", "cccccqwcccc" };
            sList.Add(str3);
            string[] str4 = new string[] { "4", "awer1" };
            sList.Add(str4);
            string[] str5 = new string[] { "5", "1a23aw55weer1" };
            sList.Add(str5);
            .......................
            ................我想把红色部分
%%1%% 替换成string[] {"1","aaaaeraa"}里面的"aaaaeraa"
%%2%% 替换成string[] {"2","berb"}里面的"berb"
...............
........
同理全部替换掉注：红色的的个数和List的个数是相同的

Answer 1

List 不合适 ，这个时候要用 Dictionary

Answer 2

用正则表达式 
 "%%(\d)%%"
取得里面的数字，就是key了，用key 查出 Dictionary的value

Answer 3

            string aa = @"2341kj%%1%%h542gf52498t7ertgs%%2%%0e76rts87df6g9dfs956s
sdfsdf%%3%%dgthdfhufdtrfydrtydr%%4%%tydrtydghjgfhjj
dertydertdydrt%%5%%ydert6yudrtyudrtyudyud7f6g";
            List<string[]> sList = new List<string[]>();
            string[] str1 = new string[] { "1", "aaaaeraa" };
            sList.Add(str1);
            string[] str2 = new string[] { "2", "berb" };
            sList.Add(str2);
            string[] str3 = new string[] { "3", "cccccqwcccc" };
            sList.Add(str3);
            string[] str4 = new string[] { "4", "awer1" };
            sList.Add(str4);
            string[] str5 = new string[] { "5", "1a23aw55weer1" };
            sList.Add(str5);
            aa = Regex.Replace(aa, @"%%(\d+)%%", new MatchEvaluator(delegate(Match m)
            {
                int num = Convert.ToInt32(m.Groups[1].Value);
                return sList[num-1][1];
            }));
            Console.WriteLine(aa);

Answer 4

%%1%% 为什么 一开始不直接定义成{1} 这样呢？然后直接string.format