c# - 正则表达式找不到所有匹配项

Question

已编辑: 我有一个 string str = "where dog is and cats are and bird is bigger than a mouse"并希望在 where 之间提取单独的子字符串和 and , and和 and , and和句子的结尾。结果应该是:dog is , cats are , bird is bigger than a mouse . (示例字符串可能包含 where 和 and 等之间的任何子字符串。)

List<string> list = new List<string>();
string sample = "where dog is and cats are and bird is bigger than a mouse";
MatchCollection matches = Regex.Matches(sample, @"where|and\s(?<gr>.+)and|$");
foreach (Match m in matches)
  {
     list.Add(m.Groups["gr"].Value.ToString());
  }

但它不起作用。我知道正则表达式不对，所以请帮我改正。谢谢。

Answer 1

“\w+ is”怎么样

  List<string> list = new List<string>();
string sample = "where dog is and cat is and bird is";
MatchCollection matches = Regex.Matches(sample, @"\w+ is");
foreach (Match m in matches)
{
    list.Add(m.Value.ToString());
}

样本:https://dotnetfiddle.net/pMMMrU