At from ClipFlair Gallery metadata input pages for Activities and Clips I had to bind an ASP.net control to a list of files and folders respectively and although I found a Folder Contents DataSource control, it didn’t cover my needs (like filtering of a folder contents). I just contributed my solution using .NET Anonymous Types and […]

When using MVVM design style for a Silverlight or WPF control, it is common to use the control’s DataContext to keep the associated ViewModel instance, so that in the XAML file for the control one can use simple binding statements from the UI to the view model (and back if TwoWay binding mode is specified) [...]

While refactoring ClipFlair code to use MVVM (Model-View-ViewModel) pattern, I came across the XAML error “Object reference not set to an instance of an object.”, shown in Visual Studio when trying to bind to my ViewModel (accessed implicitly, being set as the DataContext of the XAML control) for a property named Source. I have settled [...]