更换带有双反斜线单反斜线 [英] Replace single backslash with double backslash

问题描述

这看起来很简单，不是吗？好吧，我不知道。

It seems simple enough, right? Well, I don't know.

下面是我想要的代码：

input = Regex.Replace(input, "\\", "\\\\\\");

不过，我收到一个错误，

However, I'm receiving an error,

ArgumentException的是未处理 - 解析\ - 非法\的模式结束

ArgumentException was unhandled - parsing "\" - Illegal \ at end of pattern.

我该怎么做呢？

推荐答案

第一个应该是\\\ \，而不是\\。它的工作原理是这样的：

The first one should be "\\\\", not "\\". It works like this:

• 您已经写了\\。


• 这相当于在一个字符串序列 \ 。


• 的正则表达式引擎然后读取此，意为反斜杠这不是逃避什么，所以它抛出一个错误。

• You have written "\\".
• This translates to the sequence \ in a string.
• The regex engine then reads this, which translates as backslash which isn't escaping anything, so it throws an error.

使用正则表达式，它要容易得多使用逐字字符串。在这种情况下，逐字的字符串将是 @\\。当使用逐字的字符串，你只需要考虑转义正则表达式引擎，反斜杠字面上对待。第二个字符串也将是 @\\，因为它不会被正则表达式引擎来解释。

With regex, it's much easier to use a "verbatim string". In this case the verbatim string would be @"\\". When using verbatim strings you only have to consider escaping for the regex engine, as backslashes are treated literally. The second string will also be @"\\", as it will not be interpreted by the regex engine.

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