tags

.NET 4.0

[Entity Framework] Using Include with lambda expressions

I'm currently working on a project that uses Entity Framework 4. Even though lazy loading is enabled, I often use the ObjectQuery.Include method to eagerly load associated entities, in order to avoid database roundtrips when I access them: var query = from ord in db.Orders.Include("OrderDetails") where ord.Date >= DateTime.Today select ord; Or if I also want to eagerly load the product: var query = from ord in db.Orders.Include("OrderDetails.Product") where ord.Date >= DateTime.

[VS2010] Binding support in InputBindings

THE feature that was missing from WPF ! Visual Studio 2010 beta 2 has been released last week, and it brings to WPF a long awaited feature : support for bindings in InputBindings. As a reminder, the issue in previous releases was that the Command property of the InputBinding class wasn't a DependencyProperty, so it wasn't possible to bind it. Furthermore, InputBindings didn't inherit the parent DataContext, which made it difficult to provide alternative implementations… Until now, in order to bind the Command of a KeyBinding or MouseBinding to a property of the DataContext, we had to resort to clumsy workarounds… I had eventually came up with an acceptable solution, described in this post, but I wasn't really satisfied with it (it used reflection on private members, and had annoying limitations).

[C# 4.0] Implementing a custom dynamic object

If you've been following the news about .NET, you probably know that the upcoming version 4.0 of C# introduces a new dynamic type. This type allows to access members of an object which are not statically known (at compile time). These members will be resolved at runtime, thanks to the DLR (Dynamic Language Runtime). This feature makes it easier to manipulate COM objects, or any object which type is not statically known.