Question

const string input = "===== Action: [Action1]  State: [State1] by:[user1] at [timestamp1] =====    [Notes1]===== Action: [Action2]  State: [State2] by:[user2] at [timestamp2] =====    [Notes2]";

Regex expression = new Regex(@"===== Action: (?<Action>.*?)State:(?<State>.*?)by:(?<userid>.*?)at(?<timestamp>.*?)=====(?<Note>.*?)");

var results = expression.Matches(input);
foreach (Match match in results)
{
    Console.WriteLine("UserId:" + match.Groups["userid"].Value);
    Console.WriteLine("Action:" + match.Groups["Action"].Value);
    Console.WriteLine("State:" + match.Groups["State"].Value);
    Console.WriteLine("TimeStamp:" + match.Groups["timestamp"].Value);
    Console.WriteLine("Note:" + match.Groups["Note"].Value);
}

除了Note之外，我能够正确解析所有值。我做错了什么想法？

Answer 1

您忘记在(?======|$)结束时使用regex .. (?<Note>.*?)在您的正则表达式中将匹配所有内容直到结束，这不是您想要的...

所以正则表达式是

===== Action: (?<Action>.*?)State:(?<State>.*?)by:(?<userid>.*?)at(?<timestamp>.*?)=====(?<Note>.*?)(?======|$)

如果输入由换行符

分隔，请使用SinglelineMode选项

Answer 2

我的通灵调试意识告诉我，你的正则表达式末尾的.*?并不贪婪，只会获得0个空格（满足.*?）。

我认为您可能希望在输入和正则表达式中使用某个符号来确定Note的结尾应该在哪里

如何匹配行尾的句子？

2 个答案: