Trying to draw an image to a form, but not refreshing

Question

We are using graphics context of a form to draw an image. However it works fine on initial paint but the image is not being updated unless we set a breakpoint and run it in debug mode, stepping through each time.

What is a good way of making a seperate thread to paint on to a form every second?

Thanks.

score 2 · Accepted Answer · edited May 23 '17 at 11:48

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You don't need a thread. Just call Invalidate() on your form when a meaningful change in status has occurred (or from a timer).

Also see How do I call paint event?

edited May 23 '17 at 11:48

Community

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answered May 30 '10 at 21:47

Henk Holterman

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Thank you. We had to select a region to invalidate. (forgot about the invalidate jazz ) – flavour404 May 30 '10 at 21:59

score 1 · Answer 2 · answered May 30 '10 at 21:55

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Not sure of your exact scenario but you may be after Application.DoEvents.

answered May 30 '10 at 21:55

Justin

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Justin, DoEvents() should be avoided as much as possible. – Henk Holterman May 30 '10 at 22:01

Trying to draw an image to a form, but not refreshing

2 Answers2