c# - Regex to get substring including beginning and end values

Question

I want to use regex to pull out a string including the beginning and end values.

For example:

Regex regex = new Regex("A Bylaw(.*?)" + @"\.");
var v = regex.Match("blah blah blah A Bylaw to provide for the government and management of the Water Works System in the City and the collection of Rents, Rates, and charges for water. blah blah blah");

This returns:

to provide for the government and management of the Water Works System in the City and the collection of Rents, Rates, and charges for water

I'm looking for:

A Bylaw to provide for the government and management of the Water Works System in the City and the collection of Rents, Rates, and charges for water.

Answer 1

只需更改您的正则表达式以包含它们

Regex regex = new Regex(@"A (Bylaw.+?\.)");

http://rubular.com/r/4GRUECzqfx

Answer 2

正则表达式 regex = new Regex("(?i)A Bylaw(.*)\.");

这为您提供了匹配结果，而不用担心“章程”的情况。

如果您传递的文本有“A BYLAW”，那么这非常有效..

@Sam 我是，感谢您发布的链接。

Answer 3

据我了解，您尝试从文本中提取包含关键字的短语，为此，您可以使用：var regex = new Regex(@"(\.|^)?([^.]*Bylaw.*?(\.|$))"); https ://regex101.com/r/KjxWWC/1

• (\.|^)?将匹配一个点或文本的开头，对第一个短语很有用
• [^.]*将匹配任何不是点的东西
• Bylaw是您正在搜索的内容
• .*?将匹配任何东西，直到...
• (\.|$)将匹配短语的结束点

请注意，如果您在文本上使用它，var matches = regex.Matches("...")结果将在matches[n].Groups[1].