Question

我有一个类似下面的数据，我需要从该数据中提取密钥。

string filter=[[LUB,=,COMMERCIAL],AND,[Pgm,=,PRIVATE],AND,[Regn,=,Rasna],AND,[Month,=,06],AND,[Year,=,2018],AND,[Bywhat,=,M]]

我检查了类似的情况，并且只能得到下面的代码，该代码未根据键给出结果

我尝试过

Regex.Match(filter, @"\[(.*?)\]")

如果我给Regn，我需要得到Rasna

如果我给了LUB，它应该给COMMERCIAL并且像这样

Answer 1

尝试以下操作：

            string filter="[[LUB,=,COMMERCIAL],AND,[Pgm,=,PRIVATE],AND,[Regn,=,Rasna],AND,[Month,=,06],AND,[Year,=,2018],AND,[Bywhat,=,M]]";

            string pattern = @"\[(?'key'\w+),=,(?'value'[^\]]+)";

            MatchCollection matches = Regex.Matches(filter, pattern);

            foreach (Match match in matches.Cast<Match>())
            {
                Console.WriteLine("Key : '{0}', Value : '{1}'", match.Groups["key"].Value, match.Groups["value"].Value);
            }
            Console.ReadLine();
            Dictionary<string, string> dict = matches.Cast<Match>().GroupBy(x => x.Groups["key"].Value, y => y.Groups["value"].Value)
               .ToDictionary(x => x.Key, y => y.FirstOrDefault());

Answer 2

如果要匹配单个值，可以使用正向后看和否定的字符类：

(?<=\[Regn,=,)[^]\r\n]+(?=\])

说明

(?<=\[Regn,=,)
[^]\r\n]+否定的字符类，不匹配]或换行符（添加您也不想匹配的字符（
(?=\])断言右边是]

查看.NET regex demo或C# DEMO

string[] strings = { "LUB", "Pgm", "Regn", "Month", "Year", "Bywhat" };

foreach (string s in strings)
{
    string filter = @"[[LUB,=,COMMERCIAL],AND,[Pgm,=,PRIVATE],AND,[Regn,=,Rasna],AND,[Month,=,06],AND,[Year,=,2018],AND,[Bywhat,=,M]]";
    string pattern = string.Format(@"(?<=\[{0},=,)[^]\r\n]+(?=\])", s);
    var m = Regex.Match(filter, pattern);
    Console.WriteLine(m.Value);
}

结果

COMMERCIAL
PRIVATE
Rasna
06
2018
M

根据键值提取另一个方括号内方括号内的值

2 个答案: