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How do I use CachedBitmap in C#

Posted on 2004-04-13
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Last Modified: 2012-06-22
I'm fairly new to the Visual Studio .NET environment. I'm pretty much still used to Visual C++ 6.0. However, I'm trying to develop a small Windows Control Class that simply paints a bitmap on the control. My problem is using the CachedBitmap class. Whenever I instantiate a CachedBitmap variable, I get a message in my Task List saying : "The type or namespace name 'CachedBitmap' could not be found...

Obviously I need to import the appropriate libraries. in VC++ I would use the #include directive. It seems I need to use the Using directive for C#, but I don't seem to get this right.

All I want to know is what I need to do to be able to use the CachedBitmap class in my C# solution.

Kind regards
Josamoto
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Question by:josamoto
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3 Comments
 
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Expert Comment

by:caner_elci
ID: 10818608
CachedBitmap is a GDI+ class which is not wrapped in .NET's System.Drawing.. You don't need to use it anyway, try Bitmap instead...
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caner_elci earned 125 total points
ID: 10818647
If you need information about System.Drawing.Bitmap, you can use the following constructor:

public Bitmap(
   int width,
   int height,
   PixelFormat format
);

and you can use Format32bppPArgb as PixelFormat for your needs.. Just like:

Bitmap myBitmap = new Bitmap( 800, 600, PixelFormat.Format32bppPArgb );

then you can get a Graphics for this bitmap:

Graphics g = Graphics.FromImage( myBitmap );

now, anything you draw on g will be drawn on myBitmap..
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Expert Comment

by:Mohammed Nasman
ID: 10818992
Hi

Read this
=============
Fred_MS:
Q: rkp123 : CachedBitmap? Anybody?

Fred_MS:
A: We don't have a CachedBitmap. However, if you render to the Form (within OnPaint()) we will automatically render to a cached bitmap then bitblt forward.

http://msdn.microsoft.com/chats/vstudio/vstudio_090302.asp
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