Introduction to XAML Browser Applications (XBAP): ASP Alliance

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Introduction to XAML Browser Applications (XBAP)

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by Nihar Ranjan Nayak
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XBAP Start Time Performance

An important aspect of XBAP performance is its start time. If an XBAP is the first WPF application to load, the cold start time can be ten seconds or more. This is because the progress page is rendered by WPF, and both the CLR and WPF must be cold-started to display it.

Starting in .NET Framework 3.5 SP1, XBAP cold-start time is mitigated by displaying an unmanaged progress page early in the deployment cycle. The progress page appears almost immediately after the application is started, because it is displayed by native hosting code and rendered in HTML.

In addition, improved concurrency of the ClickOnce download sequence improves the start time by up to ten percent. After ClickOnce downloads and validates manifests, the application download starts, and the progress bar begins to update.

Conclusion

So XAML Browser Applications or XBAPs are designed for web based applications which will require .NET Framework 3.0 or later in end user's machine. Whereas WPF doesn't require the framework and its totally a windows application. Silverlight is completely for web based applications when you are targeting a number of platforms and browsers. But one common thing in all these three technologies is XAML, which is required to design the markup.

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User Comments

Title: Nice article
Name: Neetu
Date: 8/26/2009 3:23:46 AM
Comment:
Good explanation but please specify some more details on applying controls on WPF enabled application(StandAlone)

Title: thanks may fold
Name: bob
Date: 7/9/2009 7:24:29 PM
Comment:
thanks for this great write up on XBAP, i was in a panic state trying to figure out if i could use XBAP on the WEB and this answered my pressing concerns, now i can sleep!

Thanks Nihar and may great things come your way this year!

Title: Mr
Name: Nihar
Date: 3/18/2009 2:16:51 AM
Comment:
Hello Ithyan,

XBAp apps run in partial trust mode. So they can't use WCF services in .NET framework 3.0. But framework 3.5 has some improvements over 3.0. So in framework 3.5 we can use WCF in partial trust mode for.

Thanks.

Title: Mr
Name: Ithyan
Date: 3/18/2009 12:29:22 AM
Comment:
hi,

i hope XBAPs can use WCF.

am completley taken aback on seeing this."XBAPs cannot use WCF."
please check.

Title: Mr.
Name: Satyadeep Kumar
Date: 3/11/2009 5:37:04 AM
Comment:
Nice, but i'm confused about one line in conclusion: "WPF doesn't require the framework"!!!

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