去掉TextBox红色验证边框

版权声明：本文为博主原创文章，未经博主允许不得转载。 https://blog.csdn.net/gao271003105/article/details/83055365

TextBox验证输入空的时候，会给出红色的表框，这个边框可以通过重写ErrorTemplate去掉，代码如下

<Setter Property="Validation.ErrorTemplate">
            <Setter.Value>
                <ControlTemplate>
                    <ControlTemplate.Resources>
                        <BooleanToVisibilityConverter x:Key="converter" />
                    </ControlTemplate.Resources>
                    <DockPanel LastChildFill="True">
                        <Border 
                    BorderThickness="1"
                    BorderBrush="#00000000"
                    Visibility="{Binding ElementName=placeholder, Mode=OneWay, Path=AdornedElement.IsVisible, Converter={StaticResource converter}}">
                            <AdornedElementPlaceholder x:Name="placeholder" />
                        </Border>
                    </DockPanel>
                </ControlTemplate>
            </Setter.Value>
        </Setter>