问题
Double quotes can be escaped like this:
string test = @\"He said to me, \"\"Hello World\"\". How are you?\";
But this involves adding character \" to the string. Is there a C# function or other method to escape double quotes so that no changing in string is required?
回答1:
No.
Either use verbatim string literals as you have, or escape the " using backslash.
string test = "He said to me, \"Hello World\" . How are you?";
The string has not changed in either case - there is a single escaped " in it. This is just a way to tell C# that the character is part of the string and not a string terminator.
回答2:
You can use backslash either way;
string str = "He said to me, \"Hello World\". How are you?";
It prints;
He said to me, "Hello World". How are you?
which is exactly same prints with;
string str = @"He said to me, ""Hello World"". How are you?";
Here is a DEMO.
" is still part of your string.
Check out Escape Sequences and String literals from MSDN.
回答3:
In C# you can use the backslash to put special characters to your string. For example, to put ", you need to write \". There are a lot of characters that you write using the backslash: Backslash with a number:
- \000 null
- \010 backspace
- \011 horizontal tab
- \012 new line
- \015 carriage return
- \032 substitute
- \042 double quote
- \047 single quote
- \134 backslash
- \140 grave accent
Backslash with othe character
- \a Bell (alert)
- \b Backspace
- \f Formfeed
- \n New line
- \r Carriage return
- \t Horizontal tab
- \v Vertical tab
- \' Single quotation mark
- \" Double quotation mark
- \ Backslash
- \? Literal question mark
- \ ooo ASCII character in octal notation
- \x hh ASCII character in hexadecimal notation
- \x hhhh Unicode character in hexadecimal notation if this escape sequence is used in a wide-character constant or a Unicode string literal. For example, WCHAR f = L'\x4e00' or WCHAR b[] = L"The Chinese character for one is \x4e00".
回答4:
You're misunderstanding escaping.
The extra " characters are part of the string literal; they are interpreted by the compiler as a single ".
The actual value of your string is still He said to me , "Hello World".How are you ?, as you'll see if you print it at runtime.
回答5:
Please explain your problem. You say:
But this involves adding character " to the string.
What problem is that? You can't type string foo = "Foo"bar"";, because that'll invoke a compile error. As for the adding part, in string size terms that is not true:
@"""".Length == "\"".Length == 1
来源：https://stackoverflow.com/questions/14480724/escape-double-quotes-in-string