MultiBinding 列上的 WPF DisplayMemberBinding

Question

I have a ListView , and I want to be able to sort any column of it, using CollectionView .

When I have a simple binding I meet no problem to set the PropertyName of my SortDescription :

header = ((System.Windows.Data.Binding)headerClicked.Column.DisplayMemberBinding).Path.Path;

But when I have a MultiBinding, is there a way to take the Path of the first or second binding path?

My XAML is made so :

<GridViewColumn Header="{x:Static p:Resources.Quantite}" Width="50">
    <GridViewColumn.CellTemplate>
        <DataTemplate>
            <WrapPanel>
                <TextBlock>
                    <TextBlock.Text>
                        <MultiBinding Converter="{StaticResource :displayQteSurQteTot}">
                            <Binding Path="Quantite" />
                            <Binding Path="TotalQuantity" />
                        </MultiBinding>
                    </TextBlock.Text>
                </TextBlock>
            </WrapPanel>
        </DataTemplate>
    </GridViewColumn.CellTemplate>
</GridViewColumn>

Answer 1

But when I have a MultiBinding , is there a way to take the Path of the first or second binding path?

Not from the GridViewColumnHeader nor the GridViewColumn since the MultiBinding is only applied to the TextBlock element in the CellTemplate .

But you could create an attached property and set the path for each column explicitly:

public class GridViewColumnExtensions
{
    public static readonly DependencyProperty PathProperty = DependencyProperty.RegisterAttached(
        "Path",
        typeof(string),
        typeof(GridViewColumnExtensions),
        new FrameworkPropertyMetadata(null)
    );

    public static void SetPath(GridViewColumn element, string value)
    {
        element.SetValue(PathProperty, value);
    }

    public static string GetPath(GridViewColumn element)
    {
        return (string)element.GetValue(PathProperty);
    }
}

XAML:

<GridViewColumn Header="{x:Static p:Resources.Quantite}" Width="50" local:GridViewColumnExtensions.Path="test">

Usage:

string header = GridViewColumnExtensions.GetPath(headerClicked.Column);