在字符串中添加斜杠

Question

I want to replace such string

'10001'

into

\'10001\'

The following code doesnt work:

Console.WriteLine(content);
content.Replace("'", "\\'");
Console.WriteLine(content);

or even this:

Console.WriteLine(content);
content.Replace("'", "\\\\'");
Console.WriteLine(content);

The value content is exactly the same before and after replace , ie '10001'

I'm using VC# 2010 Express. Thanks for help.

Answer 1

You have to write:

content = content.Replace("'", "\\'");

string is an immutable type, which means it can't be modified. Instead the methods like Replace , Insert , etc. always return a new string instance. See here for more information.

BTW: if you're using ReSharper (or maybe a similar tool), it will warn you when you call string.Replace() without assigning/using the method's return value.

Answer 2

试试这个。

content = content.Replace("'", "\\\\\\\\'");

Answer 3

content = content.Replace("'", "\\'")

Answer 4

do you want to output json string? looks like you are attempting to do that. If that's the case you can json serializer to serialize normal string to json string just like the one that you asked for.