正则表达式，如何提取数据

Question

用户输入 2"3' 或者  2 feet 3 inches 
需要把2 ,3 提取出来
下面是我写的，发现无法匹配string JoinedFootUnits = "foots|foot|feets|feet|ft|f|\"";
string JoinedInchUnits = "inches|inchs|inch|in|i|\'";    string pattern = @"     \b
                                    (?<footHeight>(\d+))
                                    (\s*)
                                    (?<footUnit>[" + JoinedFootUnits + @"]{1})
                                    (\s*)                    
                                    (?<inchHeight>\d+)*
                                    (\s*)
                                    (?<inchUnit>[" + JoinedInchUnits + @"])*
                                    \b
                               ";
            Regex regex = new Regex(pattern, RegexOptions.IgnorePatternWhitespace);            Match match = regex.Match(height);

Answer 1

try 
(?<footHeight>\d+)\s*(?<footUnit>"|feet)\s*(?<inchesHeight>\d+)\s*(?<inchesUnit>"|inches)

Answer 2

你的[]换成()来包含你的所有unit

Answer 3

Regex re=new Regex("[a-z]")；
          re.Replace(string,"")；

Answer 4

不行，仅仅能提取 foot 不能提起 inches.