缺少Style.Triggers和x：Type。为什么？ [英] Missing Style.Triggers and x:Type. Why?

问题描述

<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< Style TargetType = {x：Type TextBox}> 给出错误找不到类型'x：Type'。确认您没有丢失程序集引用，并且所有引用的程序集均已构建。

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.

问题2：为什么会出现错误在样式类型中找不到附加属性触发器。

Question 2: Why am I getting the error The attachable property 'Triggers' was not found in type 'Style'.

我错过了什么吗？

推荐答案

您似乎正在尝试在Silverlight中使用WPF XAML。 Silverlight不支持 {x：Type} 标记扩展。您可以改用 TargetType = {TextBox} 。

It looks like you are trying to use WPF XAML within Silverlight. Silverlight does not support the {x:Type} markup extension. You can instead use TargetType={TextBox}.

此外，Silverlight没有 DataTrigger 支持！

Also, Silverlight does not have DataTrigger support!

请参阅：

Silverlight中DataTrigger的替代品是什么

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