wpf - 如何根据 Validation.HasError = False 运行 DataTrigger？

Question

在我的DataGridTextColumn上，我想运行DataTrigger，但仅当Validation.HasError为False

这就是我现在所拥有的:

<DataGridTextColumn Header="Volts" 
                Binding="{Binding DcVolts, Converter={StaticResource StringToDecimalConverter}}" 
                Width="Auto">
<DataGridTextColumn.ElementStyle>
    <Style TargetType="{x:Type TextBlock}" 
           BasedOn="{StaticResource DataGridTextColumnElementErrorStyle}">
        <Style.Triggers>
            <MultiDataTrigger>
                <MultiDataTrigger.Conditions>
                    <Condition Binding="{Binding RelativeSource={RelativeSource Self}, Path=Validation.HasError}" 
                               Value="False" />
                    <Condition Value="False">
                        <Condition.Binding>
                            <MultiBinding Converter="{StaticResource EqualityConverter}">
                                <Binding Path="DcVolts" />
                                <Binding Path="DcSpecVolts" />
                            </MultiBinding>
                        </Condition.Binding>
                    </Condition>
                </MultiDataTrigger.Conditions>
                <MultiDataTrigger.Setters>
                    <Setter Property="Background" Value="Orange" />
                </MultiDataTrigger.Setters>
            </MultiDataTrigger>
        </Style.Triggers>
    </Style>
</DataGridTextColumn.ElementStyle>

背后的想法是，Validation.HasError 必须为 False，MultiDataTrigger 才能设置 BackGround如果 EqualityConverter 的结果为 False

，则为 Orange

这是因为如果Validation.HasError为True，那么我想要我的DataGridTextColumnElementErrorStyle通常的Pink背景当我在属性上设置的规则失败时提供。

我实际上更接近这个:

<DataGridTextColumn Header="Volts" 
                Binding="{Binding DcVolts, Converter={StaticResource StringToDecimalConverter}}" 
                Width="Auto">
<DataGridTextColumn.ElementStyle>
    <Style TargetType="{x:Type TextBlock}" BasedOn="{StaticResource DataGridTextColumnElementErrorStyle}">
        <Style.Triggers>
            <DataTrigger Value="False">
                <DataTrigger.Binding>
                    <MultiBinding Converter="{StaticResource EqualityConverter}" >
                        <Binding Path="DcVolts" />
                        <Binding Path="DcSpecVolts" />
                    </MultiBinding>
                </DataTrigger.Binding>
                <Setter Property="Background" Value="Orange" />
            </DataTrigger>
            <Trigger Property="Validation.HasError" Value="True">
                <Setter Property="Background" Value="Pink" />
            </Trigger>
        </Style.Triggers>
    </Style>
</DataGridTextColumn.ElementStyle>

但问题是，在 Validation.HasError 上，ToolTip 中提供的消息(根据我创建的规则)是重复的。

非常感谢任何建议。

Answer 1

您应该在绑定(bind)路径周围添加括号，因为 Validation.HasError 是一个附加属性:

<Condition Binding="{Binding RelativeSource={RelativeSource Self}, Path=(Validation.HasError)}" 
           Value="True" />