Re: Extending System.Drawing.Rectangle...

Guys,

Thanks for the replies - my question was mostly theoretical, just out of
curiosity. I suspected that there is no way to tack on a bunch of methods to
a struct. I already implemented a new struct which has all the Rectangle
functionality and all the new methods that I wanted to add - I find the
Rectangle class very limited, so I wanted a bunch of extra methods (no more
internal fields.) This way at least there is no delegation cost (there is no
internal Rectangle instance to call) - the conversion cost will be less
during run-time.

It's quite a shame that there is no way to extend structures in .Net - this
is not the first time I run into this and I don't like my solution because
all those other functions that accept a Rectangle will not accept my
RectangleX class - I'll frequently have to do conversions. I also thought
about using a static helper class (also suggested by Simon) - technically
it's fine but it has similar shortcomings - it needs extra code that causes
clutter. <grrr>

I was hoping that someone came up with some sneaky workaround for the struct
limitation. :)

Thanks again,
Gyorgy Bozoki

> -----Original Message-----
> From: Discussion forum for developers using Windows Forms to
> build apps and controls
> [mailto:[email protected]] On Behalf Of
> Chris Anderson
> Sent: Wednesday, April 18, 2007 01:28
> To: [email protected]
> Subject: Re: [DOTNET-WINFORMS] Extending System.Drawing.Rectangle...
>
> You'd probably need to wrap the Rectangle inside a new class
> and internally use the Rectangle to perform standard
> Rectangle functionality, tgen add what you want.
> Of course you wouldn't be able to use the new class *as* a
> Rectangle where a Rectangle was expected.
>
> In .net 3.0 you *might* be able to use extension methods. (
> not 100% sure if you can use them on structs, but worth checking)
>
> What extra functionality are you looking to add?