Data=" {Binding RelativeSource= {RelativeSource FindAncestor, AncestorType= {x:Type Window}},Path=DataContext}" If you needed something more complex you could use a custom converter. Josh Smith just made a blog post about XAML DataContext comments when using the MVVM pattern. WPF ComboBox and DataBinding: DataContext, ItemsSource ... Wait! DataContext is a property that is defined within FrameworkElement, so is available to all of the WPF controls that we've considered in this tutorial. By setting the UserControl DataContext to itself, this overwrites the DataContext and breaks Inheritance. Use UserControl's DataContext property to assign ViewModel. here I've just changed <Window> in <UserControl>. There is however no TextFromParent property in that DataContext (because it is the MainWindow instance). WPF 4.0 MVVM Binding the UserControl DataContext from the MainWindow ... Example. 目前正在学习自学WPF教程。 . tip stackoverflow.com. DataContext는 WPF Window를 비롯한 대부분 UI 컨트롤이 상속하는 FrameworkElement 클래스에 정의되어 있습니다. Binding to UserControl.IsVisible and setting DataContext ... - GitHub Part Two (this one) - The binding markup extensions, the DataContext and path syntax. Show activity on this post. There's a pattern called MVVM which almost all WPF development teams use. 如何将usercontrol的dependencyproperty绑定到usercontrol的viemodel属性？ . It could potentially be added. Active 2 years, 8 months ago. Both TextBoxes are bound to the same DataContext as the rest of the page, and then the Text property is two way bound to the FirstName and LastName properties of the . The easiest way to accomplish this task is to use the MessageBox.Show method directly from the View Model . Every control in WPF has a data context, the control can access properties from your data context. Now, all of that aside, let's go over the more common properties used in DataBinding to a Selector control. WPF Data Binding - DataContext - BlackWasp 发布日期：2010-05-18. User controls, in WPF represented by the UserControl class, is the concept of grouping markup and code into a reusable container, so that the same interface, with the same functionality, can be used in several different places and even across several applications. When binding IsVisible (didn't check other properties) of an UserControl (didn't check other controls) and setting the DataContext, the IsVisible binding won't work. change ContentControl Content based on datacaontext - Microsoft Q&A
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