将2个WPF ComboBoxes数据绑定到1个源，而无需“链接”

    <x:Array x:Key="myArray" Type="{x:Type sys:String}">
        <sys:String>Item 1</sys:String>
        <sys:String>Item 2</sys:String>
        <sys:String>Item 3</sys:String>
    </x:Array>
</Window.Resources><StackPanel>
   <ComboBox x:Name="comboBox1" />
   <ComboBox x:Name="comboBox2" />
</StackPanel>

using System.Windows.Data;

public MainWindow()
{
    InitializeComponent();

    // 创建一个MultiBinding
    MultiBinding multiBinding = new MultiBinding();
    multiBinding.Mode = BindingMode.TwoWay;

    // 添加第一个ComboBox的绑定
    Binding binding1 = new Binding("SelectedItem");
    binding1.Source = comboBox1;
    multiBinding.Bindings.Add(binding1);

    // 添加第二个ComboBox的绑定
    Binding binding2 = new Binding("SelectedItem");
    binding2.Source = comboBox2;
    multiBinding.Bindings.Add(binding2);

    // 将MultiBinding添加到第一个ComboBox的SelectedItem属性中
    comboBox1.SetBinding(Selector.SelectedItemProperty, multiBinding);
}