c# - Matching Negative Sequence

Question

I want to match text between word1 and first occurrence of word2. What's the best way to do that, considering that text may include newline characters? Is there a pattern like this: (word1)(not word2)*(word2)?

Answer 1

您可以使用惰性量词来匹配 word1 和 word2 之间尽可能少的字符。

(word1).*?(word2)

请参阅MSDN 上的量词主题。

Answer 2

您可以使用 SingleLine 选项匹配它们：

//use '*' or '*?' depending on what you want for "word1 aaa word2 bbb word2"
string pattern = "word1(.*)word2";  
var m = Regex.Match(text1, pattern, RegexOptions.Singleline);
Console.WriteLine(m.Groups[1]);  // the result

MSDN 关于 SingleLine ：

... 导致正则表达式引擎将输入字符串视为由单行组成。它通过更改句点 (.) 语言元素的行为来做到这一点，使其匹配每个字符，而不是匹配除换行符 \n 或 \u000A 之外的每个字符。