如何正确表示空格字符 [英] How to correctly represent a whitespace character

问题描述

我想知道如何在C＃中表示空白字符。我发现空字符串表示形式 string.Empty 。

I wanted to know how to represent a whitespace character in C#. I found the empty string representation string.Empty. Is there anything like that that represents a whitespace character?

我想做这样的事情吗？

test.ToLower().Split(string.Whitespace)
//test.ToLower().Split(Char.Whitespace)

推荐答案

哪个空格字符？空字符串非常明确-由0个字符组成。但是， ， \t 和 \n 都是包含单个字符的字符串，这些字符的特征是空格。

Which whitespace character? The empty string is pretty unambiguous - it's a sequence of 0 characters. However, " ", "\t" and "\n" are all strings containing a single character which is characterized as whitespace.

如果您只想表示空格，请使用空格。如果您是说其他空格字符，则可能有一个自定义的转义序列（例如， \t 用于制表符），或者您可以使用Unicode转义序列（ \uxxxx ）。我不鼓励您在源代码中包括非ASCII字符，尤其是空格字符。

If you just mean a space, use a space. If you mean some other whitespace character, there may well be a custom escape sequence for it (e.g. "\t" for tab) or you can use a Unicode escape sequence ("\uxxxx"). I would discourage you from including non-ASCII characters in your source code, particularly whitespace ones.

编辑：现在，您已经解释了要执行的操作（应该这样做）。一直以来都是您的问题），最好使用 Regex。使用正则表达式 \s 拆分 表示空白：

Now that you've explained what you want to do (which should have been in your question to start with) you'd be better off using Regex.Split with a regular expression of \s which represents whitespace:

Regex regex = new Regex(@"\s");
string[] bits = regex.Split(text.ToLower());

请参见正则表达式字符类文档，以获取有关其他字符类的更多信息。

See the Regex Character Classes documentation for more information on other character classes.

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