wpf usercontrol datacontext

When we currently want to bind to a variable in UserControl View, rather than a dependent property of any object, we define the name of the View to set up ElementName and bind it. Connect and share knowledge within a single location that is structured and easy to search. This is why our Value binding is failing. C# Copy public MainPage() { InitializeComponent (); this.DataContext = new BookstoreViewModel (); } But if you do that then your page isn't as "designable" as it could be. Is there a proper earth ground point in this switch box? I know this is an old post but for anyone else coming herYou don't set up a VM for an individual control. Public Sub New () MyBase.New () Me.DataContext = New EditShipmentViewModel (Me) 'pass the view in to set as a View variable Me.InitializeComponent () End Sub Initially I hoped to have something like <UserControl> <UserControl.DataContext> <Local:EditShipmentViewModel> </UserControl.DataContext> </UserControl> Unless you are setting or binding the usercontrol's datacontext it will be mainwindowviewmodel. Where to find XAML namespace d="http://schemas.microsoft.com/expression/blend/2008" mapping library? The designer then uses the context to populate the control binding in the Design view and to display sample data in . What does this means in this context? It can be set for any FrameworkElement and specifies the design-time DataContext for a control and its children. What is the purpose of this D-shaped ring at the base of the tongue on my hiking boots? A user control acts much like a WPF Window - an area where you can place other controls, and then a Code-behind file where you can interact with these controls. Why are trials on "Law & Order" in the New York Supreme Court? I set my viewmodel datacontext the same way I observed Blend4 to. Control1 DataContext public partial class TestControl : UserControl { public TestControl () { InitializeComponent (); this.DataContext = new TestData (); } } With the DataContext of the control now set to itself, our label is now working: However, now our value has disappeared! The Binding in the UserControl's XAML is supposed to bind to a property of the UserControl itself, not one of the current DataContext. Not the answer you're looking for? This makes direct use of the d:DataContext attribute in user controls impossible and one needs to resolve to a trick. The model is created with ado.net entity framework.

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