Question

我写了这段代码：

<ControlTemplate TargetType="Label">
                <Grid Height="30" Width="70" x:Name="grid">
                    <Border>
                    <ContentPresenter HorizontalAlignment="Center" VerticalAlignment="Center"></ContentPresenter>
                    </Border>
                    <Separator>
                        <Separator.Margin>
                            <Thickness Left="{Binding Path=Width,RelativeSource={RelativeSource AncestorType=Label}}" Top="0" Right="0" Bottom="0"/>
                        </Separator.Margin>
                        <Separator.LayoutTransform>
                            <RotateTransform Angle='120'/>
                        </Separator.LayoutTransform>
                    </Separator>
                </Grid>
            </ControlTemplate>

我想只绑定分隔符的左边距，但是这段代码给了我错误。还有其他解决办法吗？

Answer 1

绑定只能应用于DependencyProperty： What is a dependency property?

Thickness.Left不是依赖项属性，因此您必须绑定整个Margin（其中是依赖项属性）。要仅调整左边缘，您可以创建一个ValueConverter来获取Width并返回Thickness。例如：

<Separator Margin="{Binding RelativeSource={RelativeSource AncestorType=Label},
                            Path=Width,
                            Converter={StaticResource MyLeftMarginConverter}}" >
    <Separator.LayoutTransform>
        ...

Xaml：仅绑定左边距

1 个答案: