（WP8.1）textbox文字超出显示区域如何自动滚动显示?

Question

如题，

文字长度超过textbox文本框，能不能让其自动滚动显示超出区域的文字；

或者用的是textblock控件?

Answer 1

您好，

>>"让其自动滚动显示超出区域的文字"

我不是很明白你的意思，你是想让超出部分的文字自动换行显示，还是其他的什么效果，还请描述清楚。

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Answer 2

不是自动换行，

就像跑马灯那样，字体从右向左移动，将未显示的字体显示出来，之前显示过的字逐步向左溢出隐藏；

Answer 3

您好，

这种效果可以考虑用动画去实现，你需要借助外层容器，比如canvas。

我的例子是用TextBlock实现的，你可以尝试用TextBox：

<Page.Resources>
        
        <Storyboard x:Name="Storyboard2" RepeatBehavior="Forever">
            <DoubleAnimationUsingKeyFrames Storyboard.TargetProperty="(UIElement.RenderTransform).(CompositeTransform.TranslateX)" Storyboard.TargetName="marquee">
                <EasingDoubleKeyFrame KeyTime="0" Value="0"/>
                <EasingDoubleKeyFrame KeyTime="0:0:3" Value="-370"/>
                <EasingDoubleKeyFrame KeyTime="0:0:6" Value="-13.75"/>
            </DoubleAnimationUsingKeyFrames>
            
        </Storyboard>
    </Page.Resources>

    <Grid Background="{ThemeResource ApplicationPageBackgroundThemeBrush}">
        <Canvas Width="150" >
            <TextBlock Name="marquee" Text="Sample Marquee abcdefghijklmnopqrst" RenderTransformOrigin="0.5,0.5" >
                <TextBlock.RenderTransform>
                    <CompositeTransform/>
                </TextBlock.RenderTransform>
            </TextBlock>
            <Button Width="100" Height="50" Content="Marquee" Click="Button_Click" Canvas.Left="168" Canvas.Top="168" />
        </Canvas>

    </Grid>

private void Button_Click(object sender, RoutedEventArgs e)
        {
            Storyboard2.Begin();
        }

另外一种，你可以考虑传统的C#编程方式去实现，可以借助Dispatcher.Timer类定时去移动文本框中的字符。

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