Is it possible to save charts as PNG images automatically to a temp dir?

And or render the chart as a temp file and control the filename?

Yes - you can do that with custom C# injected in the control. As the code is executed after the chart is populated with data and before the actual rendering, you can save to arbitrary image. You can have a 0x0 render Width & Height to avoid any output to the browser.

Why do you need to do that? What is the actual scenario?

Best Regards,
Nevron Support Team