Bind textbox to listbox

Question

There is a listBox named as listB_addRemove . I tried to bind a textbox to that listBox but I failed and nothing has shown in textbox. Below is what I tried:

<TextBox Height="23" HorizontalAlignment="Left" Margin="71,40,0,0" Name="textBox1"
         VerticalAlignment="Top" Width="120" Grid.Row="1"
         DataContext="{Binding ElementName=listB_addRemove, Path=SelectedItem}" />

Where is the problem?

Answer 1

Bind the Text, not the DataContext :

<TextBox Height="23" HorizontalAlignment="Left" Margin="71,40,0,0" Name="textBox1"
         VerticalAlignment="Top" Width="120" Grid.Row="1"
         Text="{Binding ElementName=listB_addRemove, Path=SelectedItem}" />

Answer 2

You are not binding the Text , look up how the DataContext works. If you keep this you need to add Text="{Binding .}" . Also note that if you do not bind via Path directly in the Text you cannot bind two-way, so if you want that you should move the DataContext binding to Text .

Answer 3

您的绑定位于TextBox的DataContext属性上，而应位于Text属性上。