缺少 Style.Triggers 和 x:Type。为什么？
<TextBlock Text="{Binding MyTextProperty}">
<TextBlock.Style>
<Style TargetType="{x:Type TextBox}">
<Style.Triggers>
<DataTrigger Binding="{Binding MyTextProperty}" Value="{x:Null}">
<Setter Property="Text" Value="Hey, the text should not be empty!" />
<Setter Property="Foreground" Value="Red" />
</DataTrigger>
</Style.Triggers>
</Style>
</TextBlock.Style>
</TextBlock>
问题 1：为什么
问题 2：为什么我收到错误在“Style”类型中找不到可附加属性“触发器”。< /code>
我错过了什么吗？
<TextBlock Text="{Binding MyTextProperty}">
<TextBlock.Style>
<Style TargetType="{x:Type TextBox}">
<Style.Triggers>
<DataTrigger Binding="{Binding MyTextProperty}" Value="{x:Null}">
<Setter Property="Text" Value="Hey, the text should not be empty!" />
<Setter Property="Foreground" Value="Red" />
</DataTrigger>
</Style.Triggers>
</Style>
</TextBlock.Style>
</TextBlock>
Question 1: Why is <Style TargetType="{x:Type TextBox}"> giving the error The type 'x:Type' was not found. Verify that you are not missing an assembly reference and that all referenced assemblies have been built.
Question 2: Why am I getting the error The attachable property 'Triggers' was not found in type 'Style'.
Am I missing anything ?
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您似乎正在尝试在 Silverlight 中使用 WPF XAML。 Silverlight 不支持
{x:Type}标记扩展。您可以改为使用TargetType={TextBox}。另外，Silverlight 不支持
DataTrigger！请参阅：
Silverlight 中 DataTrigger 的替代品是什么
It looks like you are trying to use WPF XAML within Silverlight. Silverlight does not support the
{x:Type}markup extension. You can instead useTargetType={TextBox}.Also, Silverlight does not have
DataTriggersupport!See:
What is the replacement for DataTrigger in Silverlight