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通过Style实现对Texbox添加水印
<Style x:Key="placeHolder" TargetType="{x:Type TextBox}" BasedOn="{StaticResource {x:Type TextBox}}"> <Setter Property="Template"> <Setter.Value> <ControlTemplate TargetType="{x:Type TextBox}"> <Grid> <TextBox Text="{Binding Path=Text, RelativeSource={RelativeSource TemplatedParent}, Mode=TwoWay, UpdateSourceTrigger=PropertyChanged}" x:Name="textSource" Background="Transparent" Panel.ZIndex="2" /> <TextBox Text="{TemplateBinding Tag}" Background="{TemplateBinding Background}" Panel.ZIndex="1"> <TextBox.Style> <Style TargetType="{x:Type TextBox}"> <Setter Property="Foreground" Value="Transparent"/> <Style.Triggers> <DataTrigger Binding="{Binding Path=Text, Source={x:Reference textSource}}" Value=""> <Setter Property="Foreground" Value="LightGray"/> </DataTrigger> </Style.Triggers> </Style> </TextBox.Style> </TextBox> </Grid> </ControlTemplate> </Setter.Value> </Setter> </Style>
【WPF高级】Cue or Hint or Watermark or Placehoder in Controls(为控件添加提示,水印,占位符)
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原文地址:http://www.cnblogs.com/HQFZ/p/4313228.html