正则表达式匹配所有字母数字和某些特殊字符？ [英] Regex to match all alphanumeric and certain special characters?

问题描述

我想获得一个正则表达式的工作，将允许所有字母数字字符（包括瓶盖和非帽，以及数字），但也允许空格，正斜杠（/），破折号（ - ）及加号（+）？

I am trying to get a regex to work that will allow all alphanumeric characters (both caps and non caps as well as numbers) but also allow spaces, forward slash (/), dash (-) and plus (+)?

我已经玩了refiddle：的http：// refiddle。 COM / GQR 但至今没有成功，任何人任何想法？

I have been playing with a refiddle: http://refiddle.com/gqr but so far no success, anyone any ideas?

我不知道这有什么差别，但我试图做到这一点C＃？

I'm not sure if it makes any difference but I am trying to do this in c#?

推荐答案

如果你想允许的只有的这些，您还需要使用的锚 ^ 和 $ 。

If you want to allow only those, you will also need the use of the anchors ^ and $.

^[a-zA-Z0-9_\s\+\-\/]+$
^                    ^^

这是你的正则表达式，我添加的字符从第二行显示。不要忘了 + 或 * 接近尾声，以允许在超过1个字符（0或更多的情况下， * ），否则正则表达式将尝试匹配只有一个字符，甚至与 .Matches 。

This is your regex and I added characters as indicated from the second line. Don't forget the + or * near the end to allow for more than 1 character (0 or more in the case of *), otherwise the regex will try to match only one character, even with .Matches.

您也可以替换全班 [A-ZA-Z0-9 _] 一个 \\ \\w ，就像这样：

You can also replace the whole class [A-Za-z0-9_] by one \w, like so:

^[\w\s\+\-\/]+$

编辑：

您可以真正避免一些逃逸，并避免最后一个精心布置逃逸（即保证了 - 为开头或结尾）：

You can actually avoid some escaping and avoid one last escaping with a careful placement (i.e. ensure the - is either at the beginning or at the end):

^[\w\s+/-]+$

这篇关于正则表达式匹配所有字母数字和某些特殊字符？的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！