Did You Know That... if you want your Silverlight control to have a transparent background, you must set isWindowless to true

re: Did You Know That... if you want your Silverlight control to have a transparent background, you must set isWindowless to true

ClosDesign — Tue, 24 Mar 2009 21:37:17 GMT

Is there a working example of any of this live on the internet?????

Everywhere I look is code but not working examples.

re: Did You Know That... if you want your Silverlight control to have a transparent background, you must set isWindowless to true

nagina — Thu, 06 Mar 2008 09:53:00 GMT

Hi Jesse,

I have some question regarding isWindowless property.

In my aspx page i am setting the background to be picture by using css property.

.body1

{

background-image: url(../images/background/bg2.jpg);

margin:0;

padding: 0px;

height:100%;

border:none;

overflow: hidden;

}

I want my silverlight to have the same background as my page or to be transparent

but, I must to set the isWindowless: to 'false', because either way i have display problems (on media center windows).

I tried to set the bakground by setting background:document.body.style.backgroundColor

and tried to set it transparent(and alpha colors) and it did not helped either.

Is there any way to set the silverlight background to be transparent and leave the isWindowless to be 'false'or maybe to set the background of silverlight to be picture too?

Thanks

Using Windowless Silverlight Controls To Blend HTML and Silverlight Elements

Jon Galloway — Fri, 15 Feb 2008 09:00:24 GMT

Silverlight 1.0 has no intrinsic controls. Forget about dropdowns and sliders, Silverlight 1.0 doesn

re: Did You Know That... if you want your Silverlight control to have a transparent background, you must set isWindowless to true

jesseliberty — Mon, 14 Jan 2008 17:57:29 GMT

Ben,

Never fear to make such corrections; even if you are not right, better that you make the comment and we discuss than that you hold back.

Thanks again.

-j

re: Did You Know That... if you want your Silverlight control to have a transparent background, you must set isWindowless to true

BenHayat — Fri, 11 Jan 2008 18:27:27 GMT

Jesse, my apology that I missed your statement. And my intention was just to make sure your blogs are always perfect! ;-)

re: Did You Know That... if you want your Silverlight control to have a transparent background, you must set isWindowless to true

swildermuth — Fri, 11 Jan 2008 17:54:24 GMT

Jesse,

Your comment I think is right on the mark. I when I teach my class, I mention that isWindowless is a cost of performance but what this really means is hard to quantify (you use the words "high performance price", but that is still ambiguous. Do you know if anyone on the team can offer any real advice on isWindowless? Is it a bigger issue with 1.0 than 2.0, etc.?

re: Did You Know That... if you want your Silverlight control to have a transparent background, you must set isWindowless to true

jesseliberty — Fri, 11 Jan 2008 17:48:11 GMT

Ben, I don't mean to be defensive, but I do mention that in both posts... "as there is a high performance price in rendering windowless controls"

It would, however, be interesting to find out if anyone has benchmarked the actual performance cost. :-)

re: Did You Know That... if you want your Silverlight control to have a transparent background, you must set isWindowless to true

BenHayat — Fri, 11 Jan 2008 17:13:20 GMT

I think you should also mention that by setting to "isWindowless" to true, there will be a performance hit while the control is being rendered. Which in 1.0 and JS running in interpreter mode, can slow things down a lot!

Just my two cents!

isWindowless and transparent background

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