为什么人们在字符串前使用@符号？ [英] Why do people use an @ sign before a string?

问题描述

您好，


我在一些代码中注意到人们有时会做一些事情

喜欢...

SomeFunction（@一个文本字符串）;


@符号的目的是什么？我在传递

连接字符串时看到的最多（不可否认，在示例代码中，连接字符串

会更好地存储在真实应用中的其他位置），但我不知道我认为这是与此相关的
。


有人想开导我吗？ TIA


-

Alan Silver

（此行下方添加的任何内容都与我无关）

解决方案

@可以缩短输入，因为它声明此字符串是文字。

两个等效字符串的示例：


string URL = @" http://msnd.microsoft.com/newsgroups" ;;

string URL =" http：////msdn.microsoft.com//newsgroups" ;;


在第二个字符串中，每个whack都必须被转义。 />
---


Gregory A. Beamer

MVP; MCP：+ I，SE，SD，DBA


***************************

在盒子外面思考！

*************************** >

" Alan Silver"写道：

你好，

我注意到在一些代码中人们有时会做的事情像
一样......

SomeFunction（@一个文本字符串）;

@符号的目的是什么？我在传递
连接字符串时看到的最多（在示例代码中，因为连接字符串
会更好地存储在真实应用程序的其他位置），但我不认为它是
任何人都在乎开导我？ TIA

-
Alan Silver
（此行下面添加的任何内容都与我无关）

> @可以缩短输入，因为它声明此字符串是文字。

两个等效字符串的示例：

string URL = @" http://msnd.microsoft.com/newsgroups" ;;
string URL =" http:////msdn.microsoft.com//newsgroups" ;;

在第二个字符串中，每个whack都必须被转义。


哦，不是那么聪明！我不知道为什么你需要加倍/ / $
第二个例子，它是否用于特殊的东西？我认为

是反斜杠，比如嵌入一个换行符。


嵌入引号怎么样，这会有帮助吗？


感谢您的回复。

***************************
在外面思考盒子！


当我长到足以看到顶部时，我会尝试思考!!

*********** ****************

Alan Silver写道：

你好，

我注意到在一些代码中人们有时会做的事情像
一样......

SomeFunction（@一个文本字符串）;

@符号的目的是什么？我在传递
连接字符串时看到的最多（在示例代码中，因为连接字符串
会更好地存储在真实应用程序的其他位置），但我不认为它是
任何人都在乎开导我？ TIA

-
Alan Silver
（此行下面添加的任何内容都与我无关）

-

Alan Silver

（此行以下添加的任何内容都与我无关）

< blockquote>是的，你是对的。我相信格雷戈里的意思。这些应该是

退格，比如一条路径。


你问的是逃避字符串。


string s ="他说，\" No！\"" ;;

string s = @"他说，" No！""" ;


注意双倍双引号。


bill


" Alan Silver" <人********* @ nospam.thanx>在消息中写道

news：uK ************** @ nospamthankyou.spam ...

@可以缩短输入，因为它声明此字符串是文字。
两个等效字符串的示例：

字符串URL = @" http://msnd.microsoft.com/newsgroups" ;;
字符串URL =" http：/// /msdn.microsoft.com//newsgroups" ;;

在第二个字符串中，每个whack都必须被转义。

哦，不，不聪明！！我不确定为什么你需要加倍/在第二个例子中，它是否用于特殊的东西？我认为反斜杠是，比如嵌入一个换行符。

如何嵌入引号，这会有帮助吗？

感谢您的回复。

***************************
在盒子外面思考！

当我长到足以看到顶部时，我会尝试思考!!

************ ***************

Alan Silver写道：

你好，

我注意到在一些代码中人们有时会做的事情像
一样......

SomeFunction（@一个文本字符串）;

@符号的目的是什么？我在传递
连接字符串时看到的最多（在示例代码中，因为连接字符串
会更好地存储在真实应用程序的其他位置），但我不认为它是
任何人都在乎开导我？ TIA

-
Alan Silver
（此行下面添加的任何内容都与我无关）

-
Alan Silver
（此行下面添加的任何内容都与我无关）

Hello,

I have noticed in a few bits of code that people sometimes do things
like...

SomeFunction(@"a text string");

What is the purpose of the @ sign? I have seen it most when passing
connection strings (admittedly in example code, as connection strings
would be better stored elsewhere in a real app), but I don''t think it''s
related to that.

Anyone care to enlighten me? TIA

--
Alan Silver
(anything added below this line is nothing to do with me)

解决方案

The @ can shorten typing, as it states "This string is a literal". Example of
two equivalent strings:

string URL = @"http://msnd.microsoft.com/newsgroups";
string URL = "http:////msdn.microsoft.com//newsgroups";

In the second string, every whack has to be escaped.
---

Gregory A. Beamer
MVP; MCP: +I, SE, SD, DBA

***************************
Think Outside the Box!
***************************

"Alan Silver" wrote:

Hello,

I have noticed in a few bits of code that people sometimes do things
like...

SomeFunction(@"a text string");

What is the purpose of the @ sign? I have seen it most when passing
connection strings (admittedly in example code, as connection strings
would be better stored elsewhere in a real app), but I don''t think it''s
related to that.

Anyone care to enlighten me? TIA

--
Alan Silver
(anything added below this line is nothing to do with me)

>The @ can shorten typing, as it states "This string is a literal". Example of

two equivalent strings:

string URL = @"http://msnd.microsoft.com/newsgroups";
string URL = "http:////msdn.microsoft.com//newsgroups";

In the second string, every whack has to be escaped.
Ooh, ain''t that clever!! I''m not sure why you need to double the / in
the second example though, is it used for something special? I thought
the backslash was, say for embedding a newline character.

How about embedding quotes, would this help?

Thanks for the reply.
***************************
Think Outside the Box!
When I grow big enough to see over the top, I''ll try thinking!!
***************************

"Alan Silver" wrote:

Hello,

I have noticed in a few bits of code that people sometimes do things
like...

SomeFunction(@"a text string");

What is the purpose of the @ sign? I have seen it most when passing
connection strings (admittedly in example code, as connection strings
would be better stored elsewhere in a real app), but I don''t think it''s
related to that.

Anyone care to enlighten me? TIA

--
Alan Silver
(anything added below this line is nothing to do with me)

--
Alan Silver
(anything added below this line is nothing to do with me)

Yes, you are correct. I am sure Gregory meant that. Those should have been
backspaces such as a unc path.

You were asking about escaping string.

string s = "He said, \"No!\"";
string s = @"He said, ""No!""";

Notice the double double quotes.

bill

"Alan Silver" <al*********@nospam.thanx> wrote in message
news:uK**************@nospamthankyou.spam...

The @ can shorten typing, as it states "This string is a literal". Example oftwo equivalent strings:

string URL = @"http://msnd.microsoft.com/newsgroups";
string URL = "http:////msdn.microsoft.com//newsgroups";

In the second string, every whack has to be escaped.

Ooh, ain''t that clever!! I''m not sure why you need to double the / in
the second example though, is it used for something special? I thought
the backslash was, say for embedding a newline character.

How about embedding quotes, would this help?

Thanks for the reply.

***************************
Think Outside the Box!

When I grow big enough to see over the top, I''ll try thinking!!

***************************

"Alan Silver" wrote:

Hello,

I have noticed in a few bits of code that people sometimes do things
like...

SomeFunction(@"a text string");

What is the purpose of the @ sign? I have seen it most when passing
connection strings (admittedly in example code, as connection strings
would be better stored elsewhere in a real app), but I don''t think it''s
related to that.

Anyone care to enlighten me? TIA

--
Alan Silver
(anything added below this line is nothing to do with me)

--
Alan Silver
(anything added below this line is nothing to do with me)

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