字符串数组去重比较,该怎么解决-C#教程-爱易网页

字符串数组去重比较,该怎么解决

日期：2014-05-17　浏览次数：21333 次

字符串数组去重比较
有一个字符串 string a="123,123,12,124,125,124,"

怎么去掉重复的123和124然后重新得到一个字符串：string b="123,12,124,125,"

帮忙了用 C#就好。

------解决方案--------------------
以逗号split，然后循环添加到List，天津前判断是否已经存在
------解决方案--------------------

C# code


        string a = "123,123,12,124,125,124,";

        string[] result = a.Split(',').Distinct().ToArray();

        string b = string.Join(",", result);

//结果b等于：123,12,124,125,

------解决方案--------------------
C# code            string str="123,123,12,124,125,124,";
            Regex reg = new Regex(@"((\d+,).*?)\2");
            while (str != (str = reg.Replace(str, "$1"))) ;
            Console.WriteLine(str);

------解决方案--------------------
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引用:
C# code
while (str != (str = reg.Replace(str, "$1"))) ;
这是个什么循环？


------解决方案--------------------
string a = "123,123,12,124,125,124,";
           string[] str = a.Split(',');

           IEnumerable<string> ling = (from b in str select b).Distinct();
           StringBuilder strbuil = new StringBuilder(100);
           foreach (string s in ling)
           {
               strbuil.Append(s);
           }