Ignore URLs in robot.txt with specific parameters?

I would like Google to ignore URLs like this:

http://www.mydomain.example/new-printers?dir=asc&order=price&p=3

In other words, all the URLs that have the parameters dir, order and price should be ignored. How do I do so with robots.txt?

Solution

Here's a solutions if you want to disallow query strings:

Disallow: /*?*

or if you want to be more precise on your query string:

Disallow: /*?dir=*&order=*&p=*

You can also add to the robots.txt which url to allow

Allow: /new-printer$

The $ will make sure only the /new-printer will be allowed.

More info: