[英]C# - regex - replace non matching characters
[there are similar questions but none is giving a valid answer for my needs] [有类似的问题,但没有一个能满足我的需求]
I allow user to input text matching this regex :我允许用户输入与此正则表达式匹配的文本:
string validChars = @"^[A-Za-zÀ-ÖØ-öø-ÿ0-9\s\.\-\&\,\'\(\)_\/\""\!\:\%]*?$";
what I want to do is to remove characters that do NOT match that regex我想要做的是删除与该正则表达式不匹配的字符
how can I INVERT the regex so I can do我怎样才能反转正则表达式,这样我才能做到
invalidChars = some_trick_to_invert_regex(validChars);
text = Regex.Replace(text, invalidChars , "");
thanks for your help感谢您的帮助
You can whitelist the characters you want to keep by placing the ^
inside the brackets.您可以通过将^
放在方括号内来将要保留的字符列入白名单。 Example:例子:
string validChars = @"[^A-Za-zÀ-ÖØ-öø-ÿ0-9\s\.\-\&\,\'\(\)_\/\""\!\:\%]";
string test = "abc#de";
var result = Regex.Replace(test, validChars, ""); //abcde
声明:本站的技术帖子网页,遵循CC BY-SA 4.0协议,如果您需要转载,请注明本站网址或者原文地址。任何问题请咨询:yoyou2525@163.com.