有关正则表达式的查询 [英] Query regarding regular expression

问题描述

大家好，

我正在使用正则表达式来验证C#.net应用程序中的数字字段.

我想接受14.2(NNNNNNNNNNNNNNNN.NN)格式的十进制数据，为此我正在使用"\ d {0,14} [.] {0,1} \ d {0,2}".问题在于该表达式也匹配负值.

请提出解决方案.

提前致谢.

Gitika

Hi All,

I am using a Regular expression to validate a numeric field in my C#.net application.

I want to accept decimal data in the format 14.2 (NNNNNNNNNNNNNN.NN), for which I am using "\d{0,14}[.]{0,1}\d{0,2}". The problem is this expression is matching negative values also.

Please suggest a solution.

Thanks in advance.

Gitika

推荐答案

尝试在前面添加"^"(并在末尾添加"

Try adding ''^'' to the front (and ''

")-它指定数字必须在字符串的开头.您还需要转义"[.]"中的.''，否则它将与任何字符匹配
试试:

'' to the end) - it specifies that the digits must be at the start of the string. You also need to escape the ''.'' in the "[.]" as otherwise it will match any character
Try:

^\d{0,14}(\.\d{0,2}){0,1}

获取 Expresso [ ^ ]-它是免费的，它可以检查并生成正则表达式.

Get a copy of Expresso [^] - it''s free, and it examines and generates Regular expressions.

这篇关于有关正则表达式的查询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！