c# and wpf - how to change comboBox item when select item of another comboBox

Question

I have an issue with two comboBoxes in wpf. The first and second comboBoxes have the same values of items like here:

ComboBox1:
Toyota
Golf
Mini

ComboBox2 :
Toyota
Golf
Mini

So when I select an item "Toyota" of ComboBox1, I want ComboBox2 to automatically change value of this selected item and vica versa. How to do this in C#? Or should I bind comboBox1 to ComboBox2? I never do it before. Your code would be much appreciated. Thanks!!

Answer 1

If both ComboBox controls share same collection of items then on both of them set IsSynchronizedWithCurrentItem to True

<ComboBox IsSynchronizedWithCurrentItem="True" ... />

so for example it can look like this:

<StackPanel xmlns:sys="clr-namespace:System;assembly=mscorlib">
   <StackPanel.Resources>
       <x:Array Type="{x:Type sys:String}" x:Key="CarList">
           <sys:String>Toyota</sys:String>
           <sys:String>Golf</sys:String>
           <sys:String>Mini</sys:String>
       </x:Array>
   </StackPanel.Resources>
   <ComboBox IsSynchronizedWithCurrentItem="True" ItemsSource="{StaticResource CarList}"/>
   <ComboBox IsSynchronizedWithCurrentItem="True" ItemsSource="{StaticResource CarList}"/>
</StackPanel>