How to make sure I don't allow more than one brackets "(" and ")" in the input text? I have the following expression that will allow numbers, spaces, hyphens and brackets.How to make sure I don't allow more than one br
阅读背景：
正则表达式使用C＃限制只出现一次打开和关闭括号
来源：互联网
分享到：
