davidpoll.com
Building systems, writing about engineering, and learning in public.
Posts
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On-demand loading of assemblies with Silverlight Navigation – Revisited for Silverlight 4 Beta
Continue reading →Way back in July, shortly after Silverlight 3 was released, I posted a technique that allowed you to use the Navigation framework in the SDK to load pages in dlls that would be downloaded as part of the navigation process. The solution relied on two things: a workaround to the navigation framework’s inability to navigate to Pages in dynamically-loaded assemblies, and a derived version of the Frame class that hid many methods in order to orchestrate downloads of dlls and their dependencies.
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Opening up Silverlight 4 Navigation: Authentication/Authorization in an INavigationContentLoader
Continue reading →Continuing my series of posts on ways to use INavigationContentLoader (a feature in the Silverlight 4 Beta SDK), in this post, I’ll explore another idea for a composable INavigationContentLoader that protects access to your pages based upon the credentials of the user of your Silverlight application. To demonstrate its use, I’m using a WCF RIA Services application (purely for their Authentication/Authorization provisions).
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Opening up Silverlight 4 Navigation: Event-based and Error-Handling INavigationContentLoaders
Continue reading →Last week, I gave an introduction to INavigationContentLoader, a Silverlight 4 Beta SDK extensibility point that allows you to load arbitrary content in conjunction with the Silverlight navigation feature, and walked you through building a Typename-based content loader. That’s all well and good, but it’s an awful lot of work to go to in order to build a simple INavigationContentLoader (following the async pattern, fully implementing the interface, etc.). Sometimes, all you really want to do is handle a few events in order to be up and running, fully integrated with Silverlight navigation. Furthermore, because of the nature of the feature, Navigation has a high potential for error conditions. For example, what happens if a user tries to follow a broken link or types a bad address into the browser’s address bar (with a browser-integrated frame)? How do you gracefully let your users know that something went wrong and give them some options about what to do next?
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Opening up Silverlight 4 Navigation: Introduction to INavigationContentLoader
Continue reading →Quick links to followup posts:
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Silverlight Toolkit November 2009: Activity Control –> BusyIndicator (a.k.a. Update 3: Displaying background activity in a Silverlight RIA application)
Continue reading →Wow! What a week! PDC, the Silverlight 4 Beta, and now the November 2009 release of the Silverlight Toolkit! There’s been a ton of great news and exciting announcements, and now I can share with you that the Activity control, first blogged here, is now a part of the Silverlight Toolkit!
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