在WPF中如何使用xaml修改Textbox聚集后的背景色？

Question

把样式写到资源文件里，然后在FocusableChanged事件里调用相应的样式

Answer 1

为了使颜色醒目，我用的是红和蓝
Dictionary：    <Style x:Key="s1" TargetType="TextBox">
        <Setter Property="Background" Value="Red"></Setter>
    </Style>
    <Style x:Key="s2" TargetType="TextBox">
        <Setter Property="Background" Value="Blue"></Setter>
    </Style>
xaml：<TextBox x:Name="txt" Width="100" Height="30" GotFocus="txt_GotFocus_1" LostFocus="txt_LostFocus_1" ></TextBox>
cs：        private void txt_GotFocus_1(object sender, RoutedEventArgs e)
        {
            this.txt.Style = Resources["s1"] as Style;
        }        private void txt_LostFocus_1(object sender, RoutedEventArgs e)
        {
            this.txt.Style = Resources["s2"] as Style;
        }