Question

How do you programmatically set a DataContext that specifies the selected item of a list?

More simply, how do you reproduce this type of binding in code?

<StackPanel>     <ListBox Name='listBox1' />     <TextBox Name='textBox1' DataContext='{Binding ElementName=listBox1, Path=SelectedItem}' /> </StackPanel> 

Answer 1

You need to set a Name for the textbox so you can refer to it in code. Then you should just be able to assign an object to the DataContext property. You can create a data binding programatically like so:

Binding binding = new Binding(); binding.ElementName = 'listBox1'; binding.Path = new PropertyPath('SelectedItem'); binding.Mode = BindingMode.OneWay; txtMyTextBox.SetBinding(TextBox.TextProperty, binding);