wpf Textbox绑定非string类型,经常出现红框

最新推荐文章于 2025-06-27 12:17:10 发布

原创最新推荐文章于 2025-06-27 12:17:10 发布 · 416 阅读

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#wpf #hadoop #大数据

Textbox绑定非string类型,为空会出现红框.失去焦点也会出现红框.用下面方法就不会出现红框,也不会出现xaml绑定错误了.

xmlns:sys="clr-namespace:Systemp;assembly=mscorlib"

<TextBox Style={StaticResource IntText} Text="{Binding Int,TargetNullValue={x:Static sys:String.Empty}}" />

<Style x:Key="IntText" TargetType="TextBox" BasedOn="{StaticResource GrayBackTextBox}">
        <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>
        <Setter Property="InputMethod.IsInputMethodEnabled" Value="False"/>
        <EventSetter Event="KeyDown" Handler="IntStyle_KeyDown"/>
    </Style>