How to Binding ComboBox with TextBox?

Question

I have a class named Order with properties of ID and Name.

I have an ObservableCollection<Order> named AllOrder.

I have a ComboBox

<ComboBox Name="CID" DataContext="{Binding ElementName=MainScreen}" 
          ItemsSource="{Binding AllOrder}" DisplayMemberPath="ID"/>

When I select the ComboBox I want TextBox to display Name, something like:

<TextBox Text="{Binding ElementName=CID,Path=SelectedItem,Display=Name}">

Answer 1

You can bind to nested properties:

<TextBox Text="{Binding ElementName=CID, Path=SelectedItem.Name}" />

SelectedItem returns the currently selected Order object and .Name returns the value of the Name property of this one.