C# 正则表达式在两个字符串之间用 newLine 查找字符串

Question

Here is my regex: Regex r = new Regex("start(.*?)end", RegexOptions.Multiline);

That means I want to get the stuff between "start" and "end" . But the problem is that between start and end is a new line or \\n and the regex doesn't return anything.

So how do I make regex find \\n ?

Answer 1

The name of the Multiline option is misleading, as is the one of the correct option - Singleline :

Regex r = new Regex("start(.*?)end", RegexOptions.Singleline);

From MSDN, RegexOptions Enumeration :

Singleline - Specifies single-line mode. Changes the meaning of the dot (.) so it matches every character (instead of every character except \\n).

Answer 2

Include the RegexOptions.SingleLine which means that . matches everything, including \\n

Regex r = new Regex("start(.*?)end", RegexOptions.Multiline | RegexOptions.SingleLine);

See http://msdn.microsoft.com/en-us/library/system.text.regularexpressions.regexoptions.aspx for more details.

Answer 3

Use Singleline instead of Multiline :

Regex r = new Regex("start(.*?)end", RegexOptions.Singleline);

BTW, RegexBuddy is your invaluable friend (No, I'm not connected whatsoever to the author, except for being a happy user).