【WPF】TextBox样式重写注意事项

1、普通控件重写需要添加一行

 <ContentPresenter HorizontalAlignment="Center" VerticalAlignment="Center"  Margin="{TemplateBinding Padding}"></ContentPresenter>

2、TextBox之类的编辑控件重写，需要填加一行

 <ScrollViewer x:Name="PART_ContentHost"></ScrollViewer>

只有这样才能进入编辑模式

举个栗子：

<ControlTemplate x:Key="RoundTextBoxTemplate" TargetType="TextBox">
        <Border CornerRadius="5" BorderBrush="LightSkyBlue" BorderThickness="2" Background="{TemplateBinding Background}" Margin="3">
            <ScrollViewer x:Name="PART_ContentHost"></ScrollViewer>
        </Border>
    </ControlTemplate>

    <Style x:Key="RoundTextBoxStyle" TargetType="TextBox">
        <Setter Property="Template" Value="{DynamicResource ResourceKey=RoundTextBoxTemplate}" ></Setter>
    </Style>

上面就是实现最简单的TextBox重写样式的功能了