OnRender method for a CAnvas in WPF

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Hello,
can we write onRender method for a XAML canvas?

i want to draw some shapes, images on a canvas.
i have taken a canvas from Xaml, Now how can i write OnRender method for the canvas.

or we have to create a custom class inheriting from canvas then only we can write onRender method?

Plz help me out

Thanks.

Posted 15-Nov-11 23:36pm

KiranBabu M

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Rob Philpott · Accepted Answer · 2011-11-15T23:49:00

Solution 1

Not an expert in WPF, but you'd normally derive a class from Canvas and override the OnRender method. That's just basic OO, because its no longer just a canvas, it's a canvas with some extra functionality.

Posted 15-Nov-11 23:49pm

Rob Philpott

Comments

KiranBabu M 16-Nov-11 5:54am

so,
we cannot override a OnRender method for a canvas which is added from Xaml.

Rob Philpott 16-Nov-11 5:58am

You can't override it because that can only be done in child classes. You may be able to hook an event or something.

Simple enough, derive a simple class from Canvas, add your rendering logic, then replace the Canvas in your XAML with your new type.

Is there a reason you want to use graphics primitives rather than the basic graphics elements?

Sergey Alexandrovich Kryukov 16-Nov-11 5:59am

Sorry, why would you answer on something which you have no idea about, and you did not even bother to check with MSDN? This is not how it works; and there is no such or similar method. Sorry, but please don't confuse people with such posts. I just had to vote 1, sorry.
--SA

Rob Philpott 16-Nov-11 6:10am

You're an arrogant individual aren't you? Please explain what is wrong with what I'm suggesting.

Sergey Alexandrovich Kryukov 16-Nov-11 7:14am

No, that's not it. I apologize: I posted complete gibberish, sorry.
I'll remove my post and vote 5 for yours.

Please understand: if I was right and you really written unresponsive message, my notes would not like arrogant. I just was completely wrong. I must be more careful.

Sorry,
--SA

Rob Philpott 16-Nov-11 7:32am

np. :)