什么是正则表达式&如何在C＃中使用正则表达式？ [英] What is Regex & How to use Regular Expressions with C#?

问题描述

在dotnet中使用正则表达式有什么用？我们如何在程序中实现它？

What is the use of regex in dotnet and how can we implement this in our program?

推荐答案

引用：

正则表达式有什么用？

看看这里：

http://en.wikipedia.org/wiki/Regular_expression#Uses [ ^ ]

http://blog.stevenlevithan.com/archives/10-reasons-to-learn-and-use-regular-expressions [ ^ ]

Have a look here:
http://en.wikipedia.org/wiki/Regular_expression#Uses[^]
http://blog.stevenlevithan.com/archives/10-reasons-to-learn-and-use-regular-expressions[^]

Quote：

我们如何在我们的程序中实现这一点？

how can we implement this in our program?

看看这里：

30分钟正则表达式教程 [ ^ ]

http：//www.tutorialspoint。 com / csharp / csharp_regular_expressions.htm [ ^ ]

http://msdn.microsoft.com /en-us/library/system.text.regularexpressions.regex.aspx [ ^ ]

Have a look here:
The 30 Minute Regex Tutorial[^]
http://www.tutorialspoint.com/csharp/csharp_regular_expressions.htm[^]
http://msdn.microsoft.com/en-us/library/system.text.regularexpressions.regex.aspx[^]

正则表达式（或正则表达式）是一种处理文本和执行varie的方法对它们进行模式匹配的过程。



例如，编写一个应用程序来重命名所有MP3文件，使其具有MY MUSIC前缀：

Regexes (or Regular Expressions) are a way to process text and perform a variety of pattern matching processes on them.

And example would be to write an application to rename all your MP3 files to have a "MY MUSIC" prefix:

public static Regex regex = new Regex(
      "^(?<!MYMUSIC)(.*\\.MP3)

，
RegexOptions.IgnoreCase
| RegexOptions.Multiline
| RegexOptions.Singleline
| RegexOptions.IgnorePatternWhitespace
| RegexOptions.Compiled
）;


// 这是替换字符串
public static string regexReplace =
MYMUSIC

", RegexOptions.IgnoreCase | RegexOptions.Multiline | RegexOptions.Singleline | RegexOptions.IgnorePatternWhitespace | RegexOptions.Compiled ); // This is the replacement string public static string regexReplace = "MYMUSIC

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