Saving image of a plot in Silverlight

10 years ago • 0

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Tech_Junkie wrote at 2012-08-03 10:50:

I'm trying to save my plot (lineseries with axes) to something that I can use elsewhere in my application without having to load an oxyplot element. For this I would like to export the plot to an image (preferable just a standard silverlight implementation for internal use).

I cannot find the .ToImage() function that is mentioned in http://oxyplot.codeplex.com/discussions/280515 .
using my own rendercontext like in http://oxyplot.codeplex.com/discussions/347011 would be an option, but I would imagine it can be done in an easier and more generic way.
converting from SVG to an image is also not that easy as I read around the internet.

What would be the best way to go about this?

Would it be possible to get a xaml path from the plot? as this is one of the easiest ways to store vector data in silverlight.

dcuccia wrote at 2012-08-03 21:24:

Not sure if there's a new way to do this, but in our OSS project (MIT/X-11 license) we want to persist images of controls, with the additional option of printing.

Here's how we do that bit:

In Silverlight, WritableBitmap has a constructor overload that takes any UIElement, so you can...

1) create a WriteableBitmap using the UIElement overload

2) encode the bitmap to a .jpg (optional)

3) save the image

a) if you want a user-specified location to save, you have to use an OpenFileDialog

b) otherwise, you can save to isolated storage

Here's the code: http://pastebin.com/g37yg0RL

Tech_Junkie wrote at 2012-08-06 16:33:

This looks good! Thank you! I think this will be very sufficient for my needs.

dcuccia wrote at 2012-08-06 19:46:

Good to hear - my pleasure. :)