如何在XAML中为组合框定义值转换器

Question

我尝试将DistanceRoundoffs列表的值加载到ComboBox。这些值在mm中，但我想在cm中显示它们，因此我需要使用值转换器。

我不知道如何以及在何处使用它。我应该在ItemsSource还是SelectedItem中定义它？

我不需要价值转换器的代码;只是在XAML中实现当前的组合框。

<ComboBox ItemsSource="{Binding Path=DistanceRoundoffs}"
          SelectedItem="{Binding DistanceRoundoff, 
                    RelativeSource={RelativeSource FindAncestor, AncestorType=Window}, 
                    Mode=TwoWay}">
        <ComboBox.ItemTemplate>
            <DataTemplate>
                <TextBlock>
                    <TextBlock.Text>
                        <MultiBinding Converter="{StaticResource MultiUnitConverter}" ConverterParameter="{x:Static enumerations:Quantity.Length}">
                            <Binding Path="RebarsVerticalDistanceRoundoff"/>
                            <Binding Path="CurrentTargetUnit"/>
                        </MultiBinding>
                    </TextBlock.Text>
                </TextBlock>
            </DataTemplate>
        </ComboBox.ItemTemplate>
</ComboBox>

private List<double> distanceRoundoffs = new List<double> {25, 50};
public List<double> DistanceRoundoffs
{
    get { return distanceRoundoffs; }
    set
    {
        distanceRoundoffs = value;
        RaisePropertyChanged("DistanceRoundoffs");
    }
}

private double distanceRoundoff;
public double DistanceRoundoff
{
    get { return distanceRoundoff; }
    private set
    {
        distanceRoundoff= value;
        RaisePropertyChanged("DistanceRoundoff");
    }
}

Answer 1

您应该在ComboBox的ItemTemplate中使用转换器：

<ComboBox ...>
    <ComboBox.ItemTemplate>
        <DataTemplate>
            <TextBlock Text="{Binding Converter={StaticResource UnitConverter}}"/>
        </DataTemplate>
    </ComboBox.ItemTemplate>
</ComboBox>