WPF 组合框 Validation.ErrorTemplate 错误 [英] WPF Combobox Validation.ErrorTemplate error

问题描述

我有一个组合框，我需要编辑其错误模板以在出现验证错误时显示红色边框.

I have a combobox that i need to edit its error template to show a red border when there is a validation error.

我正在使用以下样式

<Style TargetType="{x:Type ComboBox}" >
    <Setter Property="Validation.ErrorTemplate">
        <Setter.Value>
            <ControlTemplate>
                <DockPanel>
                    <Border BorderBrush="Red" BorderThickness="3">
                        <AdornedElementPlaceholder />
                    </Border>
                </DockPanel>
            </ControlTemplate>
        </Setter.Value>
    </Setter>
    <Setter Property="FontFamily" Value="Segoe UI" />
    <Setter Property="FontSize" Value="12" />
    <Setter Property="VerticalAlignment" Value="Center" />
</Style>

发生验证错误时，边框永远不会出现.任何提示出了什么问题?

The border never shows up when validation errors occur. Any tips what is going wrong?

推荐答案

您发布的 Style 作品.您应该检查您的绑定，您是否将 ValidatesOnDataErrors=True 和 ValidatesOnExceptions=True 添加到 SelectedValue 的绑定中?

The Style you posted works. You should check your binding, did you add ValidatesOnDataErrors=True and ValidatesOnExceptions=True to the binding of SelectedValue?

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