How to replace '/' with '\\' using QString replace()?

Question

Can anyone help with following? Suppose I have a QString with a filepath stored of a certain file, I want to replace the /(slashes) from it with \\(double backslashes) I tried:

mystring.replace("/","\\");

But it only puts a single \ instead of \\

String before replacement: D:/myfiles/abc.zip

String after replacement: D:\myfiles\abc.zip

Expected string: D:\\myfiles\\abc.zip

Answer 1

You need to use:

mystring.replace("/","\\\\");

The compiler uses \ as an escape character in strings (for things like \t, \n or \r) so that \\ is actually turned into \. If you need two backslashes, you need to start with four.

Answer 2

If you want to convert paths to Windows format, you could simply use QDir::toNativeSeparators():

qDebug() << QDir::toNativeSeparators("c:/windows/path"); // Prints "c:\windows\path"