基于ComboBox选择的WPF按钮IsEnabled覆盖默认样式

   <Style x:Key="ButtonStyle" TargetType="{x:Type Button}">
       <Setter Property="IsEnabled" Value="False" />
       <Style.Triggers>
            <DataTrigger Binding="{Binding SelectedItem, ElementName=comboBox}" Value="Item1">
               <Setter Property="IsEnabled" Value="True" />
            </DataTrigger>
            <DataTrigger Binding="{Binding SelectedItem, ElementName=comboBox}" Value="Item2">
               <Setter Property="IsEnabled" Value="True" />
            </DataTrigger>
        </Style.Triggers>
    </Style>
</Window.Resources><StackPanel>
   <ComboBox x:Name="comboBox" Width="100">
       <ComboBoxItem>Item1</ComboBoxItem>
       <ComboBoxItem>Item2</ComboBoxItem>
       <ComboBoxItem>Item3</ComboBoxItem>
    </ComboBox>
   <Button Content="Click me!" Style="{StaticResource ButtonStyle}" />
</StackPanel>