How to prevent ASP.NET Chart Control images from being indexed?

I have some pages on my public website that display charts generated by ASP.NET Chart contro开发者_如何转开发ls. How can I prevent them from being indexed by Google and other search engines?

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When you configure the chart control you can setup the location that information is saved to, then simply setup a Robots.txt file to disallow indexing of content from that folder.

More information on Robots.txt to disallow image indexing can be found here.

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You can create a Robots.txt file. I believe most major search providers honors this.

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Google have some answers on the subject