C# 正则表达式匹配不包含某个字符串的字符串？
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C# Regex to match a string that doesn't contain a certain string?
提问by Shaul Behr
I want to match any string that does notcontain the string "DontMatchThis".
我想匹配任何不包含字符串“DontMatchThis”的字符串。
What's the regex?
什么是正则表达式？
采纳答案by Kamarey
try this:
尝试这个：
^(?!.*DontMatchThis).*$
回答by Wiktor Stribi?ew
The regex to match a string that does not contain a certain pattern is
匹配不包含特定模式的字符串的正则表达式是
(?s)^(?!.*DontMatchThis).*$
If you use the pattern without the (?s)(which is an inline version of the RegexOptions.Singlelineflag that makes .match a newline LF symbol as well as all other characters), the DontMatchThiswill only be searched for on the first line, and only a string without LF symbols will be matched with .*.
如果您使用不带 the 的模式(?s)（这是匹配换行符 LF 符号以及所有其他字符的RegexOptions.Singleline标志的内联版本.），DontMatchThis则将仅在第一行搜索，并且仅会搜索没有 LF 符号的字符串与.*.
Pattern details:
图案详情：
(?s)- a DOTALL/Singleline modifier making.match any character^- start of string anchor(?!.*DontMatchThis)- a negative lookaheadchecking if there are any 0 or more characters (matched with greedy.*subpattern - NOTEa lazy.*?version (matching as few characters as possible before the next subpattern match) might get the job done quicker ifDontMatchThisis expected closer to the string start) followed withDontMatchThis.*- any zero or more characters, as many as possible, up to$- the end of string (see Anchor Characters: Dollar ($)).
(?s)- 一个 DOTALL/Singleline 修饰符.匹配任何字符^- 字符串锚点的开始(?!.*DontMatchThis)-一个负先行检查，如果有任何0或更多字符（贪婪匹配的.*子模式-注意一个懒惰的.*?版本（匹配为下一子模式比赛前几个字符可能）会完成这项工作更快，如果DontMatchThis预计接近字符串的开始) 紧随其后DontMatchThis.*- 任何零个或多个字符，尽可能多，最多$- 字符串的结尾（请参阅锚字符：Dollar ($)）。
