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Bill Osuch - Random geek notes Windows Store
How to preserve state across pages in a Windows 8 app
When designing a Windows 8 app, you need a way to preserve the state of various items as you navigate from page to page. Windows allows this using the pageState dictionary - a dictionary that can contain any serializable object. If you're a web programmer, you can think of this as similar to using a session variable. Today I'll add this to the cascading ListBoxes shown earlier. You can download the code for that project at First, we'll add a navigation button to the page. Put ......

Posted On Friday, January 4, 2013 11:58 AM

Using cascading ListBoxes to display hierarchical data in Windows 8
When you're dealing with hierarchical data (a tree-like data format such as folders that have sub-folders that have subfolders, etc.) you have to come up with an organized way of displaying it. You could create a tree view, similar to how Windows Explorer displays folders, but I wanted to try something different in Windows 8 - cascading ListBoxes. The user selects an items in a ListBox, and then a new ListBox appears to the right showing the sub-categories. This continues as long as there's data ......

Posted On Thursday, December 20, 2012 2:28 PM

Retrieving a list of eBay categories in a .Net 4.5 Windows Store App
Previously I wrote a post on how to get the eBay category list using their .Net SDK. I wanted to try doing the same thing in a Windows Store App for Windows 8 using Visual Studio 2012, but quickly ran into compatibility problems since the DLLs are compiled for .Net 2.0. I could have either changed the targetted framework, or attempted to re-write the DLLs, but neither sounded particularly exciting, so I simply decided to fall back to using a simple URL request and parsing it via Linq to XML. As mentioned ......

Posted On Wednesday, December 19, 2012 11:18 AM

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