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.NET Forum / Windows Forms / Design Time / July 2005Refreshing the whole form
Is there a way for me to refresh the entire form to allow controls with transparent backgrounds to refresh correctly and be superimposable?  Signature~Mike Powell www.ramuseco.com The ability to have a transparent background for a control is provided by code in the framework that asks the parent Form to paint its background over the control when the control itself is painted. So if two sibling controls overlap then the transparency will not work as you expect. I have recently posted a blog entry that explains in more depth how the control provides transparent background support. Might be worth reading... http://componentfactory.blogspot.com Phil Wright > Is there a way for me to refresh the entire form to allow controls with > transparent backgrounds to refresh correctly and be superimposable? My problem is that my transparent backgrounds work fine at runtime, its just that during design time, their backgrounds don't refresh correctly. It seems to me that the control does not actually belong to the parent form because my controls use a similiar refresh method as the one in your blog. What i really need to do is to refresh the whole form at design-time. Signature~Mike Powell www.ramuseco.com > The ability to have a transparent background for a control is provided by > code in the framework that asks the parent Form to paint its background [quoted text clipped - 10 lines] >> Is there a way for me to refresh the entire form to allow controls with >> transparent backgrounds to refresh correctly and be superimposable? For those of you interested in this... The solution was to cast the IDesignerHost.RootComponent to a control and call Invalidate(true). The display flickers a bit but all the bad pixels are clean. This answer was provided by the most revered Mr Shawn Burke. THE design-time guru. (Mike, if you read this before I see you it's checked in) SignatureBob Powell [MVP] Visual C#, System.Drawing Ramuseco Limited .NET consulting http://www.ramuseco.com Find great Windows Forms articles in Windows Forms Tips and Tricks http://www.bobpowell.net/tipstricks.htm Answer those GDI+ questions with the GDI+ FAQ http://www.bobpowell.net/faqmain.htm All new articles provide code in C# and VB.NET. Subscribe to the RSS feeds provided and never miss a new article. > Is there a way for me to refresh the entire form to allow controls with > transparent backgrounds to refresh correctly and be superimposable? Free MagazinesGet these publications absolutely FREE for up to 12 months. There are no hidden fees and no obligation. Simply choose a title, complete the application form and submit it. Read more ...
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