逃避正则表达式特殊字符 [英] Escape Special Character in Regex

问题描述

有没有办法逃避的正则表达式[]的特殊字符，如（）* 及其他，从一个字符串？

Is there a way to escape the special characters in regex, such as []()* and others, from a string?

基本上，我要求用户输入一个字符串，我希望能够在使用正则表达式的数据库进行搜索。有些我跑进是太多）的或 [XY]范围内以相反的顺序等问题

Basically, I'm asking the user to input a string, and I want to be able to search in the database using regex. Some of the issues I ran into are too many)'s or [x-y] range in reverse order, etc.

所以，我想要做的就是写一个函数做用户输入取代。例如，将（与 \（，将 [与 \ [

So what I want to do is write a function to do replace on the user input. For example, replacing ( with \(, replacing [ with \[

有一个内置的功能正则表达式这样做呢？如果我有从头开始编写一个函数，有没有办法可以轻松地解释，而不是写一个替换说明一中的所有字符？

Is there a built-in function for regex to do so? And if I have to write a function from scratch, is there a way to account all characters easily instead of writing the replace statement one by one?

我在C＃中使用写我的程序Visual Studio 2010中

I'm writing my program in C# using Visual Studio 2010

推荐答案

您可以使用.NET的内置的 Regex.Escape 这个来自微软的例子复制：

You can use .NET's built in Regex.Escape for this. Copied from Microsoft's example:

string pattern = Regex.Escape("[") + "(.*?)]"; 
string input = "The animal [what kind?] was visible [by whom?] from the window.";

MatchCollection matches = Regex.Matches(input, pattern);
int commentNumber = 0;
Console.WriteLine("{0} produces the following matches:", pattern);
foreach (Match match in matches)
   Console.WriteLine("   {0}: {1}", ++commentNumber, match.Value);  

// This example displays the following output: 
//       \[(.*?)] produces the following matches: 
//          1: [what kind?] 
//          2: [by whom?]

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