我可以在逐字字符串中转义双引号吗？

发布于 2024-08-14 19:15:31 字数 167 浏览 5 评论 0原文

在 C# 中的逐字字符串文字 (@"foo") 中，反斜杠不被视为转义符，因此使用 \" 来获取双引号不起作用。有没有办法在逐字字符串文字中获取双引号？

这显然行不通：

string foo = @"this \"word\" is escaped";

原文

In a verbatim string literal (@"foo") in C#, backslashes aren't treated as escapes, so doing \" to get a double quote doesn't work. Is there any way to get a double quote in a verbatim string literal?

This understandably doesn't work:

string foo = @"this \"word\" is escaped";

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弄潮 2024-08-21 19:15:32

使用重复的双引号。

@"this ""word"" is escaped";

输出：

this "word" is escaped

Use a duplicated double quote.

@"this ""word"" is escaped";

outputs:

this "word" is escaped

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喜你已久 2024-08-21 19:15:32

使用双引号。

string foo = @"this ""word"" is escaped";

Use double quotation marks.

string foo = @"this ""word"" is escaped";

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若沐 2024-08-21 19:15:32

这应该有助于解决您可能遇到的任何问题：C# 文字

这是来自链接内容：

<表类=“s-表”>
<标题>
常规文字
逐字文字
结果字符串

<正文>
“你好”
@“你好”
你好
“反斜杠：\\”
@“反斜杠：\”
反斜杠：\
“引用：\”“
@"引用："""
引用：“
“CRLF：\r\n后 CRLF”
@"CRLF: 发布 CRLF"
CRLF: 发布 CRLF

This should help clear up any questions you may have: C# literals

Here is a table from the linked content:

Regular literal Verbatim literal Resulting string
"Hello" @"Hello" Hello
"Backslash: \\" @"Backslash: \" Backslash: \
"Quote: \"" @"Quote: """ Quote: "
"CRLF:\r\nPost CRLF" @"CRLF: Post CRLF" CRLF: Post CRLF

Regular literal	Verbatim literal	Resulting string
`"Hello"`	`@"Hello"`	`Hello`
`"Backslash: \\"`	`@"Backslash: \"`	`Backslash: \`
`"Quote: \""`	`@"Quote: """`	`Quote: "`
`"CRLF:\r\nPost CRLF"`	`@"CRLF: Post CRLF"`	`CRLF: Post CRLF`

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女中豪杰 2024-08-21 19:15:32

为了添加更多信息，您的示例将在没有 @ 符号的情况下工作（它可以防止使用 \ 转义），这样：

string foo = "this \"word\" is escaped!";

它可以双向工作，但我更喜欢双引号样式，因为它更容易例如，使用文件名（字符串中有很多 \）。

For adding some more information, your example will work without the @ symbol (it prevents escaping with \), this way:

string foo = "this \"word\" is escaped!";

It will work both ways but I prefer the double-quote style for it to be easier working, for example, with filenames (with lots of \ in the string).

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花开浅夏 2024-08-21 19:15:32

更新：使用 C# 11 预览功能 - 原始字符串文字

string foo1 = """
   this "word" is escaped
   """;

string foo2 = """this "word" is escaped""";

历史：

GitHub 上有一项针对 C# 语言的提案，旨在更好地支持原始字符串文字。一个有效的答案是鼓励 C# 团队向该语言添加一项新功能（例如三重引号 - 像 Python）。

请参阅 https://github.com/dotnet/csharplang/discussions/89#discussioncomment- 257343

Update: With C# 11 Preview feature - Raw String Literals

string foo1 = """
   this "word" is escaped
   """;

string foo2 = """this "word" is escaped""";

History:

There is a proposal open in GitHub for the C# language about having better support for raw string literals. One valid answer, is to encourage the C# team to add a new feature to the language (such as triple quote - like Python).

see https://github.com/dotnet/csharplang/discussions/89#discussioncomment-257343

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好倦 2024-08-21 19:15:32

正如文档所述：

简单的转义序列...按字面解释。只有引号转义序列 ("") 不会按字面解释；它产生一个双引号。此外，在逐字插入的字符串大括号转义序列（{{ 和 }}）的情况下，不会按字面解释；它们产生单大括号字符。

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我最亲爱的 2024-08-21 19:15:32

从 C#11 开始，您可以使用原始字符串< /a>，由三个双引号分隔。

它们可以是单行或多行：

var singleLine = """Anything, including " is supported here without escaping""";
var multiLine = """
    Any blank after the opening quotes in previous line is discarded.
    This is WYSIWYG, including "quotes" and new lines.
        This line is indented by 4 characters, not 8, because
    the number of characters before the closing quotes
    of the next line are removed from each line.
    """;

多行版本保留新行和缩进，但有趣的是，它会丢弃结束“”的缩进之前的字符，如上所述。并且，正如预期的那样，第一行是下面的行开头，最后一个是结束引号之前的，

您还可以使用 @""" 进行插值，例如

var @"""
    The value of "{property}" is:
    {value}
    """;

注意：我在这个答案中将代码格式化为 python，因为C# 格式化程序还没有意识到这一点，而 python 格式化程序使这一点更具可读性

Since C#11 you can use raw strings, which are delimited by three double quotes.

They can be either single or multiline:

var singleLine = """Anything, including " is supported here without escaping""";
var multiLine = """
    Any blank after the opening quotes in previous line is discarded.
    This is WYSIWYG, including "quotes" and new lines.
        This line is indented by 4 characters, not 8, because
    the number of characters before the closing quotes
    of the next line are removed from each line.
    """;

The multiline version keeps the new lines and indenting, but interestingly it discards the characters before the indentation of the closing """ as explained above. And, as expected, the first line is the one below the opening, and the last is the one before the closing quotes.

And you can also use @""" for interpolation, like

var @"""
    The value of "{property}" is:
    {value}
    """;

NOTE: I formatted the code as python in this answer, because the C# formatter is not aware of this yet, and python formatter keeps this more readable

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~没有更多了~