Pass output from ToDataURL() to method in ASP.NET code behind?

Question

I have a JavaScript function bound to an ASP button's click event which uses the HTML5 toDataURL function to grab the canvas:

function getimg ()
{
    try
    {
        var img = canvas.toDataURL('image/jpeg', 0.9).split(',')[1];
    } 
    catch(e) 
    {
        var img = canvas.toDataURL().split(',')[1];
    }
}

What's the best way to take the resulting img and pass it to a code-behind method? I found this post among others and experimented successfully with using a hidden field, but I'm hoping there's a more direct (less indirect?) way.

tnt-rox · Accepted Answer · 2012-02-02 08:13:36Z

0

Try using the canvaspixelarray property.

answered Feb 2, 2012 at 8:13

tnt-rox

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