Re: Bitmap .net GDI+

Andrew,

I normally don't return bitmaps from a class. If potential callers need to
perform some operations on a bitmap owned by a class, I add those methods to
the class and callers can call them. The method implementations internally
use the private bitmap object and make necessary changes.

If I need to return a bitmap, I normally return a copy of it - when the
owner class goes out of scope, it can safely dispose it. (I rarely return
bitmaps, as all the copying around takes quite a bit of work for the
processor.)

If the bitmap needs to be shared, I create it on a higher level and pass it
as a parameter to lower level classes. This way all lower level classes can
use the same bitmap, but only the higher level class can free it up.

From functions within a single class (when the caller is a member of the
same class), I think it's ok to return Bitmap objects, as long as the
functions know when to get rid of it.

HTH,
Gyorgy Bozoki

> -----Original Message-----
> From: Discussion of building .NET applications targeted for
> the Web [mailto:[email protected]] On Behalf Of
> Andrew Dunn
> Sent: Monday, July 30, 2007 12:15
> To: [email protected]
> Subject: [DOTNET-WEB] Bitmap .net GDI+
>
> Hi,
>
> Does anyone have a reliable method of when to correctly
> dispose of bitmap objects. ie - should i return a Bitmap
> object as a class property? What is best practices?
>
>
> Thank you
>
>
> Andrew
>
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