WPF UserControl公开自定义属性

Question

I am developing an application following the MVVM model and writing my code in VB.

I have created my own UserControl, let's call it 'Arrow', which has a property in its ViewModel called 'Angle'. In my main window I have a ListBox which is bound to a collection and each ListItem will be an Arrow.

How can I bind an angle value in the ListBox 's DataSource to the Angle property of each instance of my UserControl please?

From my research so far it looks as if I need to create a DependencyProperty for Angle. If this is the case do I create this in my ViewModel, in the code-behind the XAML or elsewhere?

I'm sure this is simple when you know how!

Answer 1

The DependencyProperty would be defined in the UserControl (the code-behind). You'd then bind that property to the property in the ViewModel