如何更改文本块背景？

这是我的xaml structure

<stackpanel>
  <textblock Text="A"></textblock>
  <textblock Text="B"></textblock>
</stackpanel>

Stackpanel，可以循环生成更多相同的结构。

单击文本块时如何更改文本块的背景颜色？

UPDATE: I just want change on xaml file not using C#.

默认情况下我是黄色的，但是当我单击文本块时，它的背景将变为蓝色。

UPDATE 2：如果单击 A，A 将变为蓝色，直到我单击另一个。

Detail:

1. 我点击A(A is yellow), A 将变为蓝色 ==> A 为蓝色

2. 我点击B(B is yellow and A is blue)，B 将变为蓝色，A 将变为黄色。

UPDATE 3： 这个怎么样？

<stackpanel>
      <textblock Text="A"></textblock>
</stackpanel>

<stackpanel>
      <textblock Text="A"></textblock>
</stackpanel>
<stackpanel>
      <textblock Text="A"></textblock>
</stackpanel>

问题和上面一样

Thanks!

Using 事件触发 and 彩色动画您可以更改 TextBlock 背景颜色的颜色鼠标按下 or 鼠标离开

xml代码

 <StackPanel>
    <StackPanel.Resources>
        <Style TargetType="TextBlock">
            <Style.Triggers>
                <EventTrigger RoutedEvent="MouseDown">
                    <BeginStoryboard>
                        <Storyboard>
                            <ColorAnimation Storyboard.TargetProperty="Background.Color" From="Yellow" To="Blue" Duration="0:0:0.1"></ColorAnimation>
                        </Storyboard>
                    </BeginStoryboard>
                </EventTrigger>
                <EventTrigger RoutedEvent="MouseLeave">
                    <BeginStoryboard>
                        <Storyboard>
                            <ColorAnimation Storyboard.TargetProperty="Background.Color" From="Blue" To="Yellow" Duration="0:0:0.1"></ColorAnimation>
                        </Storyboard>
                    </BeginStoryboard>
                </EventTrigger>
            </Style.Triggers>
        </Style>
    </StackPanel.Resources>
    <TextBlock Text="A" Background="Yellow"></TextBlock>
    <TextBlock Text="B" Background="Yellow"></TextBlock>
</StackPanel>

Update

Use 具有属性 IsReadOnly=True 的文本框而不是文本块。

    <StackPanel>
    <StackPanel.Resources>
        <Style TargetType="TextBox"> 
            <Setter Property="Background" Value="Yellow"></Setter>
            <Setter Property="BorderThickness" Value="0"></Setter> 
            <Setter Property="IsReadOnly" Value="True"></Setter>
            <Style.Triggers>
                <EventTrigger RoutedEvent="TextBox.GotFocus">
                    <BeginStoryboard>
                        <Storyboard>
                            <ColorAnimation Storyboard.TargetProperty="Background.Color" From="Yellow" To="Blue" Duration="0:0:0.1"></ColorAnimation>
                        </Storyboard>
                    </BeginStoryboard>
                </EventTrigger>
                <EventTrigger RoutedEvent="TextBox.LostFocus">
                    <BeginStoryboard>
                        <Storyboard>
                            <ColorAnimation Storyboard.TargetProperty="Background.Color" From="Blue" To="Yellow" Duration="0:0:0.1"></ColorAnimation>
                        </Storyboard>
                    </BeginStoryboard>
                </EventTrigger>
            </Style.Triggers>
        </Style>
    </StackPanel.Resources>
    <TextBox Text="A"></TextBox>
    <TextBox Text="A"></TextBox>
</StackPanel>