TextBox不自动滚动下滚动查看器

Question

我在ScrollViewer内使用TextBox。在编辑模式下，如果我们禁用ScrollViewer的VerticalScrollBarVisibility属性，则TextBox会自动滚动。如果我们将其设置为“可见”或“自动”，则TextBox不会自动滚动。此外TextBox的ScrollViewer.VerticalScrollBarVisibility属性不起作用在Windows Phone它的作品在Windows 8上。

我没有得到如何做到这一点。滚动和长文本都是强制性的。

另外我得到这个Post使滚动TextBlock，但因为我是新手到Windows手机。我不知道如何处理TextBox。

Answer 1

诀窍是通过编辑其默认模板将TextBox控件的内部更改为ScrollViewer。

与ContentControl默认样式（从下七号线）变更为ScrollViewer：

<Style x:Key="TextBoxStyle1" 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> 

如何使用：

<TextBox AcceptsReturn="True" TextWrapping="Wrap" VerticalAlignment="Top" Style="{StaticResource TextBoxStyle1}"/> 

我有一个很难找到原来此信息。我希望它能帮助你和其他WP开发者。