Remove Points without clearing the screen

Asked Sep 06 '13 at 18:50

Active Sep 06 '13 at 19:14

Viewed 88 times

I am using the CreateGraphics().DrawLine functions to draw graphs in my program, and want to continuously update these points.

The only way I found to remove lines from the screen was to Refresh() it. The thing is, this removes all of the lines (or segments of the line).

What I want to do is to clear one part (or segment) of a line, and replace it with another, without having to draw all of the other points again as well.

Example: Initial line is : (x and y coordinates)

1,1->2,2; 2,2->3,3; 3,3->4,4...

Now I just want to make the first part: 4,4->2,2; and leave the rest.

Additional info: I am using windows forms, not WPF

edited Sep 06 '13 at 19:14

crthompson

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asked Sep 06 '13 at 18:50

Protawn

Are you using WPF or WinForms? – 123 456 789 0 Sep 06 '13 at 18:53
1

Just don't use CreateGraphics. Minimize your window and restore it to see how it that's just not the right method to use. – Hans Passant Sep 06 '13 at 18:53
What would you suggest using? :) – Protawn Sep 06 '13 at 18:57
@user2755408 Paint everything in a `Paint` event handler or `OnPaint` overridden method. – King King Sep 06 '13 at 19:00
`to draw graphs in my program` - You might want to check [My Example](http://stackoverflow.com/a/15821573/643085) on that using relevant technologies. – Federico Berasategui Sep 06 '13 at 19:17

Remove Points without clearing the screen

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