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 ListBoxDrillDown.zip. First, we'll add a navigation button to the page. Put ......
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 ......
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 ......
eBay offers a .Net SDK for its Trading API - this post will show you the basics of making an API call and retrieving a list of current categories. You'll need the category ID(s) for any apps that post or search eBay. To start, download the latest SDK from https://www.x.com/developer... and create a new console app project. Add a reference to the eBay.Service DLL, and a few using statements: using eBay.Service.Call; using eBay.Service.Core.Sdk; using eBay.Service.Core.Soap; ......