Doch wie sieht es mit dem DataBinding von Außen aus? CustomUserControl will expect that SomeOtherProperty is … you do not need to declare any properties at all in the UserControl. 5 WPF用户控件的DataContext为空 我有一个用户控件，其中控件的XAML可以绑定到父正常的数据上下文中的相应属性（数据上下文在xaml中传播）。 例如，我有一个窗口，其DataContext我将设置为ObjectA。 然后我在窗口中的用户控件尝试访问dataContext中的属性 所以我 … WPF Usercontrol mit DPs und eigenem Viewmodel | myCSharp.de 那么反过来，如果我们把 TestViewModel 绑定到 UserControl 的内部控件上的话， 那么就不会受到外部View 的 DataContext 的覆盖或者说干扰**，因此能够顺利地完成绑定的查找。. Check the DataContext of the control and of the parent. To be more precise, the ViewModelExtensions class identifies whether the DataContext is an object that implements the ISupportParameter interface. Content; ContentTemplate; ContentTemplateSelector; ContentStringFormat (3.5 sp1 +); Basically, the … The obvious and intuitive approach would be this one : . That means, after initializing the application I lost my DataContext from the UserControl, but have the DataContext from the Window at both, Window and UserControl. Wie kann … 4. wpf but you have to bind to the DataContext of the MainWindow with RelativeSource. Bei Windows Forms ist die Ableitung von UserControls eine einfache Sache. EDIT: DataContext And Autowire In WPF - C# Corner UserControl You can set the Source on a Binding and that effectively over-rides the DataContext just for that Binding. I've found that the parent of a UserControl is always null in the constructor, but in any event handlers the parent is set correctly. VSTO, .NET, C#; Design, Implementierung und Test eine Komponente für dynamische Definition von Business Rules. . 提问于 四月 8, 2019. Sub Window. So you need to set the DataContext on the root element.

Baumhaushotel Chiemsee, Articles W