WPF将GridViewColumn绑定到不同的属性

Question

<GridViewColumn x:Name="DescriptionColumn" Header="{DynamicResource MyHeader}" >
    <GridViewColumn.CellTemplate>
        <DataTemplate>
            <TextBlock Text="{Binding MyText1}"/>        
        </DataTemplate>
    </GridViewColumn.CellTemplate>
</GridViewColumn>

最好的办法是什么？根据显示的数据，我希望绑定到MyText1或MyText2。我怎么做“开关”？

Answer 1

这样做的方法是使用多重绑定...

                <GridViewColumn x:Name="DescriptionColumn" Header="{DynamicResource MyHeader}" >
                    <GridViewColumn.CellTemplate>
                        <DataTemplate>
                            <TextBlock Style="{StaticResource TextBlockMultiValue}"/>
                        </DataTemplate>
                    </GridViewColumn.CellTemplate>
                </GridViewColumn>

它使用以下资源...

    <local:MultiValueConverter x:Key="MultiValueConverter"/>
    <Style x:Key="TextBlockMultiValue" TargetType="TextBlock">
        <Setter Property="Text">
            <Setter.Value>
                <MultiBinding Converter="{StaticResource MultiValueConverter}">
                    <Binding Path="MyText1"/>
                    <Binding Path="MyText2"/>
                    <Binding Path="Switch"/>
                </MultiBinding>
            </Setter.Value>
        </Setter>
    </Style>

转换器如下所示...

public class MultiValueConverter : IMultiValueConverter
{
    public object Convert(object[] values, Type targetType, object parameter, CultureInfo culture)
    {
        if ((bool)values[2] == true)
            return values[0].ToString();
        else
            return values[1].ToString();
    }

    public object[] ConvertBack(object value, Type[] targetTypes, object parameter, CultureInfo culture)
    {
        throw new NotImplementedException();
    }
}