在字符串C＃中搜索特定模式

Question

I got a string which can has a part which looks like this: "1.0.0" but it can also look like this "1.0.0.0" and these are the parts I need out of the string. I tried using this regular expression:

var dotPart = Regex.Match(infoString, @"(\d+)\.(\d+)\.(\d+)(\.d+)*");

This works fine on "1.0.0" but not on "1.0.0.0" which then returns only the first 3 digits instead of the last. How do I fix my pattern? And for general knowledge, what is wrong with the pattern I wrote?

Answer 1

您错过了\\d的最后一个反斜杠：

var dotPart = Regex.Match(infoString, @"(\d+)\.(\d+)\.(\d+)(\.\d+)*");

Answer 2

This tool always helped me. RegEx builder