Regex.Replace（）用于替换整个事件

Question

Am using regex.Replace() to replace the whole occurrence of a string.. so I gave like Regex.Replace(str,@stringToReplace,"**"); where stringToReplace = @"session" + "\\b";

if i give like that its not replacing.. but if i give like Regex.Replace(str,@"session\\b","**"); then its working.. how to avoid this.. i want to pass value which will be set dynamically..

Thanks nimmi

Answer 1

尝试

stringToReplace = @"session" + @"\b";

Answer 2

The @ here means a verbatim string literal .

When you write "\\b" without the @ it means the backspace character, ie the character with ASCII code 8. You want the string consisting of a backslash followed by a b , which means a word boundary when in a regular expression.

To get this you need to either escape the backslash to make it a literal backslash: "\\\\b" or make the second string also into a verbatim string literal: @"\\b" . Note also that the @ in @"session" (without the \\b ) doesn't actually have an effect, although there is no harm in leaving it there.

stringToReplace = "session" + @"\b";

Answer 3

@"session" + "\\b" and @"session\\b"

are not the same string. In the first case "\\b" you don't treat the slash as a slash but as an escape parameter. In the second case you do.

So @"session" + @"\\b" should bring the same result