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Asked: 2026-05-11T04:13:54+00:00

I have a Silverlight application which has on it a Canvas. On that Canvas,

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I have a Silverlight application which has on it a Canvas. On that Canvas, I dynamically ‘paint’ a bunch of stuff, but adding controls to the canvas.

I have a button outside the Canvas area which clears the content. The objects are removed (successfully). However, the Canvas area does not refresh itself immediately; it currently requires a MouseOver or other event for the Canvas itself.

What is the simplest way to have an external object invalidate a Canvas? I’m sure I’m missing something simple!

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1 Answer

  1. It’s a bit grubby, but you could try changing the visibility to ‘Visible’ (even though it already is) of the Canvas, so:

    myCanvas.Visibility = Visibility.Visible;

    We’ve found that this forces as redraw, even if the actual value of myCanvas.Visible hasn’t changed…

    Give it a go, it’s only a one liner that may fix things. Although I would expect the Canvas to be redrawing anyway if you’re removing things from it.

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