Adding a string to the verbatim string literal

问题:

I have a path that is named defaultPath I want to add it into this verbatim string literal but can quite get the quotes around it.

    @"""C:\Mavro\MavBridge\Server\MavBridgeService.exe"" /service /data ""..\Data"""

I was trying to add +defaultPath to replace Data. So lets say I have a folder name Data.Apple I want the output to be

   "C:\Mavro\MavBridge\Server\MavBridgeService.exe" /service /data "..\Data.Apple"

But when I have been doing it for the past half hour I have been getting

   "C:\Mavro\MavBridge\Server\MavBridgeService.exe" /service /data "..\"Data.Apple

or

   "C:\Mavro\MavBridge\Server\MavBridgeService.exe" /service /data "..\" + defaultPath

回答1:

Do it like this (preferred):

string.Format(@"""C:\Mavro\MavBridge\Server\MavBridgeService.exe"" /service /data ""..\{0}""", defaultPath);

Or like this:

@"""C:\Mavro\MavBridge\Server\MavBridgeService.exe"" /service /data ""..\" + defaultPath + "\"";

---

The first one uses string.Format, which basically replaces the {0} in the first parameter with the value in the second parameter and returns the result.

The second one uses classical string concatenation and what I did there was to remove the double quotes after the last backslash (""..\ instead of ""..\""), because you didn't want the quotes after the backslash. You wanted the quotes after defaultPath. And that's what this code does: It appends defaultPath (" + defaultPath) and appends the closing quote afterwards (+ "\"").

回答2:

Use string.Format to insert the variable between the quotes:

string path = "Data.Apple";
string verbatim = string.Format(@"""C:\Mavro\MavBridge\Server\MavBridgeService.exe"" /service /data ""{0}""", path);
MessageBox.Show(verbatim);

It makes it easier to read and to implement, you can replace other portions of the path with variable sections in a similar manner.

If you try to just append the "defaultPath" variable to the end, it will never work correctly, as you've already added the closing ".

回答3:

So if you would like to take advantage of the string interpolation with c# 6 you could also do

var randomText = "insert something";
var yourString = $@"A bunch of text in here 
that is on seperate lines
but you want to {randomText }";