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Any ContentControl such as Button and any ItemsControl, such as ListBox and ListView, have built-in . Creating & using a UserControl - The complete WPF tutorial This is so that the UserControl knows to look at itself to locate bindings. Two questions regarding porting WPF code to WinUI: Window Datacontext ... Part Four - Value converters. For more information, see the ContentControl class. I tried setting an x:Name on the usercontrol and using {Binding property, ElementName=root} but it does not seem to work. Step 2. Binding to UserControl.IsVisible and setting DataContext ... - GitHub Simply put, it allows you to specify a basis for your . It's usual to have a viewmodel which is the datacontext to a window. public partial class MyControl : UserControl { public MyControl () { InitializeComponent . WPF: Tips - DataContext Special Source - TechNet Articles - United ... Data=" {Binding RelativeSource= {RelativeSource FindAncestor, AncestorType= {x:Type Window}},Path=DataContext}" If you needed something more complex you could use a custom converter. Solution 1. A UserControl is a ContentControl, which means that it can contain a single object of any type (such as a string, an image, or a panel). 4. In an effort to follow SRP I wanted the behavior of the ViewModel of the parent window to be . This overview describes the WPF property system and the capabilities of a dependency property, including how to use existing dependency properties in XAML and in code. WPF UserControl: DataContext The file structure is essentially something like this. These two properties don't serve the same purpose. Select a file using the browse button and see the name of the file appear in the TextBox control. WPF UserControl Reuse With MVVM - Software Engineering Stack Exchange A standalone UserControl that can be used anywhere without a specific DataContext being required. When they are both at the project namespace, the view runs without exceptions with binding statements along the lines of: where PrefixFilterChoices is a property on the VM. A property that's backed by the WPF property system is known as a dependency property. User Control: A user control inherits from the UserControl base class (which derives from Control). 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. By setting the UserControl DataContext to itself, this overwrites the DataContext and breaks Inheritance. 使う側でWindow.DataContextが別に設定されていても、そちらはバインドに使用されません。 ユーザーコントロール内部で設定したDataContextの方が使用されてしまいます。 そうなるのはWindow側でUserControl.DataContextを触らなかったときのお話。