WPF-使用样式触发器设置自定义工具提示 [英] WPF - Setting Custom tooltip using style triggers

问题描述

我正在尝试基于属性HasValidationError将工具提示显示在堆栈面板上。

I am trying to display tool tip to a stack panel based on property HasValidationError.

        <Style TargetType="StackPanel" x:Key="stackstyle">
            <Style.Triggers>
                <DataTrigger Binding="{Binding HasValidationError}" Value="True">
                    <Setter Property="ToolTip">
                        <Setter.Value>
                            <Binding Path="DisplayError"/>
                        </Setter.Value>
                    </Setter>
                </DataTrigger>
            </Style.Triggers>
        </Style>

代码工作正常。但它会在黄色背景下显示工具提示（作为普通工具提示）。我需要对其进行自定义以更改并包含图像。为此，

The code works fine. But it displays the tooltip under yellow background ( as normal tooltip). I need to customize it to change and include image. For that,

        <Style TargetType="StackPanel" x:Key="stackstyle">
            <Style.Triggers>
                <DataTrigger Binding="{Binding HasValidationError}" Value="True">
                    <Setter Property="ToolTip">
                        <Setter.Value>
                            <StackPanel>
                                 <!-- Have to add image and other decorations here -->
                                 <TextBlock Text = "{Binding DisplayError}"/>
                            </StackPanel>
                        </Setter.Value>
                    </Setter>
                </DataTrigger>
            </Style.Triggers>
        </Style>

在将StackPanel添加到时显示错误。请帮助我解决问题。

It shows error when adding StackPanel to the . Please help me in solving.

推荐答案

我不知道为什么会失败，但是您可以通过制作工具提示来解决此问题。资源：

I don't know why that fails, but you can work around it by making the ToolTip a resource:

<StackPanel x:Key="ToolTipContents">
    <!-- Have to add image and other decorations here -->
    <TextBlock Text = "{Binding DisplayError}"/>
</StackPanel>
<Style TargetType="StackPanel" x:Key="stackstyle">
    <Style.Triggers>
        <DataTrigger Binding="{Binding HasValidationError}" Value="True">
            <Setter Property="ToolTip" Value="{StaticResource ToolTipContents}"/>
        </DataTrigger>
    </Style.Triggers>
</Style>

或

<ToolTip x:Key="ToolTipContents">
    <StackPanel>
        <!-- Have to add image and other decorations here -->
        <TextBlock Text = "{Binding DisplayError}"/>
    </StackPanel>
</ToolTip>
<!-- etc -->

此外，您拥有的代码将按.NET 4编写，因此该错误已得到修复。 。

Also, the code you have will work as written in .NET 4, so the bug has been fixed.

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