Windows Phone 8 滚动文本框的内容
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【中文标题】Windows Phone 8 滚动文本框的内容【英文标题】：Windows Phone 8 Scroll content of textbox 【发布时间】：2014-06-08 08:32:00 【问题描述】：问题：当我在TextBox 中输入大文本时，我在TextBox 中输入时看不到指针
说明：
-
每当用户在
TextBox 中输入文本时，如果输入的文本很大，则应启用滚动。
ScrollViewer 仅在 ScrollViewer 的高度内显示 TextBox 的内容
当我输入几行文本时出现问题（指针不可见）
然后我向下滚动查看指针，再输入几行后问题再次出现
代码：
<Grid x:Name="LayoutRoot" Background="Transparent">
<Grid.RowDefinitions>
<RowDefinition Height="Auto"/>
<RowDefinition Height="*"/>
</Grid.RowDefinitions>
<StackPanel x:Name="TitlePanel" Grid.Row="0" Margin="12,17,0,28">
<TextBlock Text="Scroll Content Inside Textbox" Style="StaticResource PhoneTextNormalStyle" Margin="25,0,180,0"/>
</StackPanel>
<Grid x:Name="ContentPanel" Grid.Row="1" Margin="12,0,12,0">
<ScrollViewer Height="200"
VerticalAlignment="Top">
<TextBox x:Name="txtBody"
Width="200"
AcceptsReturn="True"
/>
</ScrollViewer>
</Grid>
</Grid>
【问题讨论】：
这是我针对同样问题的帖子...***.com/questions/23208133/… 在您的解决方案中，同样的问题出现在 11 行之后 试试这个***.com/questions/5908225/… 【参考方案1】：MainPage.xaml
<Grid x:Name="LayoutRoot" Background="Transparent">
<Grid.RowDefinitions>
<RowDefinition Height="Auto"/>
<RowDefinition Height="*"/>
</Grid.RowDefinitions>
<StackPanel x:Name="TitlePanel" Grid.Row="0" Margin="12,17,0,28">
<TextBlock Text="Scroll Content Inside Textbox" Style="StaticResource PhoneTextNormalStyle" Margin="25,0,180,0"/>
</StackPanel>
<Grid x:Name="ContentPanel" Grid.Row="1" Margin="12,0,12,0">
<ScrollViewer Height="200"
Name="scrlView"
VerticalAlignment="Top">
<TextBox x:Name="txtBody"
Width="200"
AcceptsReturn="True" KeyUp="txtBody_KeyUp"/>
</ScrollViewer>
</Grid>
</Grid>
MainPage.xaml.cs
private void txtBody_KeyUp(object sender, System.Windows.Input.KeyEventArgs e)
if (e.Key == System.Windows.Input.Key.Enter)
scrlView.UpdateLayout();
scrlView.ScrollToVerticalOffset(scrlView.ExtentHeight);
技巧：
(1) 将ScrollViewer命名为scrlView
(2) 我在TextBox的KeyUp事件中写了代码
(3) 每当用户按下回车键，然后通过代码向下滚动文本框
感谢大家的宝贵时间和支持
【讨论】：
这样每次都会把焦点放在最后一行。假设我输入了 10 行，现在我想编辑第一行，那个时候也会关注最后一行，而不是第一行，有没有办法解决这个问题。【参考方案2】：你要做的就是基本上把文本框的内容放在滚动查看器中。 这是旧代码，但您应该能够看到指针并按需滚动。 （据我记忆，我现在没有可能测试它） 您可能还发现有必要将此文本框放在 Scrollviewer 后面，但没有它也可以工作。不幸的是，文本框的高度必须是硬编码的（如果你把它放在 scrollvierer 高度，或者 scrollviewer 的 maxheight 必须硬编码。） 希望它有所帮助（并且有效）！
<ScrollViewer Grid.Column="1"
VerticalScrollBarVisibility="Auto"
HorizontalScrollBarVisibility="Disabled"
MaxHeight="150"
Name="scroll"
/>
<TextBox Grid.Column="1" Text="text" InputScope="Chat"
Name="message"
Height="Auto"
Style="StaticResource ScrollableTextBox"
TextWrapping="Wrap"
AcceptsReturn="True" TextChanged="MessageTextChanged" />
<Style x:Key="ScrollableTextBox" TargetType="TextBox">
<Setter Property="FontFamily" Value="StaticResource PhoneFontFamilyNormal"/>
<Setter Property="FontSize" Value="StaticResource PhoneFontSizeMediumLarge"/>
<Setter Property="Background" Value="StaticResource PhoneTextBoxBrush"/>
<Setter Property="Foreground" Value="StaticResource PhoneTextBoxForegroundBrush"/>
<Setter Property="BorderBrush" Value="StaticResource PhoneTextBoxBrush"/>
<Setter Property="SelectionBackground" Value="StaticResource PhoneAccentBrush"/>
<Setter Property="SelectionForeground" Value="StaticResource PhoneTextBoxSelectionForegroundBrush"/>
<Setter Property="BorderThickness" Value="StaticResource PhoneBorderThickness"/>
<Setter Property="Padding" Value="2"/>
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="TextBox">
<Grid Background="Transparent">
<VisualStateManager.VisualStateGroups>
<VisualStateGroup x:Name="CommonStates">
<VisualState x:Name="Normal"/>
<VisualState x:Name="MouseOver"/>
<VisualState x:Name="Disabled">
<Storyboard>
<ObjectAnimationUsingKeyFrames Storyboard.TargetProperty="Background" Storyboard.TargetName="MainBorder">
<DiscreteObjectKeyFrame KeyTime="0" Value="Transparent"/>
</ObjectAnimationUsingKeyFrames>
<ObjectAnimationUsingKeyFrames Storyboard.TargetProperty="BorderBrush" Storyboard.TargetName="MainBorder">
<DiscreteObjectKeyFrame KeyTime="0" Value="StaticResource PhoneDisabledBrush"/>
</ObjectAnimationUsingKeyFrames>
<ObjectAnimationUsingKeyFrames Storyboard.TargetProperty="Foreground" Storyboard.TargetName="ContentElement">
<DiscreteObjectKeyFrame KeyTime="0" Value="StaticResource PhoneDisabledBrush"/>
</ObjectAnimationUsingKeyFrames>
</Storyboard>
</VisualState>
<VisualState x:Name="ReadOnly">
<Storyboard>
<ObjectAnimationUsingKeyFrames Storyboard.TargetProperty="Visibility" Storyboard.TargetName="MainBorder">
<DiscreteObjectKeyFrame KeyTime="0">
<DiscreteObjectKeyFrame.Value>
<Visibility>Collapsed</Visibility>
</DiscreteObjectKeyFrame.Value>
</DiscreteObjectKeyFrame>
</ObjectAnimationUsingKeyFrames>
<ObjectAnimationUsingKeyFrames Storyboard.TargetProperty="Visibility" Storyboard.TargetName="ReadonlyBorder">
<DiscreteObjectKeyFrame KeyTime="0">
<DiscreteObjectKeyFrame.Value>
<Visibility>Visible</Visibility>
</DiscreteObjectKeyFrame.Value>
</DiscreteObjectKeyFrame>
</ObjectAnimationUsingKeyFrames>
<ObjectAnimationUsingKeyFrames Storyboard.TargetProperty="Background" Storyboard.TargetName="ReadonlyBorder">
<DiscreteObjectKeyFrame KeyTime="0" Value="StaticResource PhoneTextBoxBrush"/>
</ObjectAnimationUsingKeyFrames>
<ObjectAnimationUsingKeyFrames Storyboard.TargetProperty="BorderBrush" Storyboard.TargetName="ReadonlyBorder">
<DiscreteObjectKeyFrame KeyTime="0" Value="StaticResource PhoneTextBoxBrush"/>
</ObjectAnimationUsingKeyFrames>
<ObjectAnimationUsingKeyFrames Storyboard.TargetProperty="Foreground" Storyboard.TargetName="ContentElement">
<DiscreteObjectKeyFrame KeyTime="0" Value="StaticResource PhoneTextBoxReadOnlyBrush"/>
</ObjectAnimationUsingKeyFrames>
</Storyboard>
</VisualState>
</VisualStateGroup>
<VisualStateGroup x:Name="FocusStates">
<VisualState x:Name="Focused">
<Storyboard>
<ObjectAnimationUsingKeyFrames Storyboard.TargetProperty="Background" Storyboard.TargetName="MainBorder">
<DiscreteObjectKeyFrame KeyTime="0" Value="StaticResource PhoneTextBoxEditBackgroundBrush"/>
</ObjectAnimationUsingKeyFrames>
<ObjectAnimationUsingKeyFrames Storyboard.TargetProperty="BorderBrush" Storyboard.TargetName="MainBorder">
<DiscreteObjectKeyFrame KeyTime="0" Value="StaticResource PhoneTextBoxEditBorderBrush"/>
</ObjectAnimationUsingKeyFrames>
</Storyboard>
</VisualState>
<VisualState x:Name="Unfocused"/>
</VisualStateGroup>
</VisualStateManager.VisualStateGroups>
<Border x:Name="MainBorder" BorderBrush="TemplateBinding BorderBrush" BorderThickness="TemplateBinding BorderThickness" Background="TemplateBinding Background" Margin="StaticResource PhoneTouchTargetOverhang"/>
<Border x:Name="ReadonlyBorder" BorderBrush="StaticResource PhoneDisabledBrush" BorderThickness="TemplateBinding BorderThickness" Background="Transparent" Margin="StaticResource PhoneTouchTargetOverhang" Visibility="Collapsed"/>
<Border BorderBrush="Transparent" BorderThickness="TemplateBinding BorderThickness" Background="Transparent" Margin="StaticResource PhoneTouchTargetOverhang">
<ScrollViewer x:Name="ContentElement" BorderThickness="0" HorizontalContentAlignment="Stretch" Margin="StaticResource PhoneTextBoxInnerMargin" Padding="TemplateBinding Padding" VerticalContentAlignment="Stretch"/>
</Border>
</Grid>
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>
【讨论】：
【参考方案3】：尝试将文本框包装在 StackPanel 中，以便它可以扩展。例如：
<Grid x:Name="ContentPanel" Grid.Row="1" Margin="12,0,12,0">
<ScrollViewer HorizontalScrollBarVisibility="Auto">
<StackPanel VerticalAlignment="Top" HorizontalAlignment="Left">
<TextBox x:Name="txtBody"
Width="200"
AcceptsReturn="True"
/>
</StackPanel>
</ScrollViewer>
</Grid>
【讨论】：
这是另一种方法，但问题是一样的以上是关于Windows Phone 8 滚动文本框的内容的主要内容，如果未能解决你的问题，请参考以下文章
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