问题
I've created a form with rounded corners using Form.Region. It works, but unfortunately the rounding appears rough. Are there any tricks for smoothing such shaped form corners? I know many applications support this, just not sure how to make it in .NET.
Thanks guys.
回答1:
There is no good fix for this, regions cannot be anti-aliased. This is inevitable, anti-aliasing only works when you know the background colors so you can blend properly. That's not an option for windows, the background is by design unpredictable. If this is a splash screen then you can fake it by taking a screen shot of the background and drawing your fake window on top of it. Won't work for more than a few seconds.
Best thing to do is to keep the corner radius small so it is not so noticeable. Also use a tool like SysInternals' ZoomIt and take a close look at the rounded corners of a program like Windows Media Player. Note the gray tones it uses to draw the border.
回答2:
From what I've read online most people end up overriding the forms onpaint event and drawing the region there. This allows them to use GDI+ with antialiasing and make it look much cleaner.
The examples I found:
http://netcode.ru/dotnet/?lang=&katID=30&skatID=283&artID=7833 http://www.xtremevbtalk.com/showthread.php?t=288178
来源：https://stackoverflow.com/questions/4727726/smooth-edges-of-non-rectangular-form-in-net