How to Sort a DataGridTextColumn which uses a MultiBinding Converter

Question

I use a multibinding with a value converter to provide the visual display of a collection of items in my DataContext. Here is a snippet of the XAML;

<DataGrid.Columns>
    <DataGridTextColumn x:Name="Column1"
                        SortMemberPath="{Binding Path=SomeDataModelProperty}">
    <DataGridTextColumn.Binding>
        <MultiBinding Converter="{StaticResource MyCustomConverter}">
            <Binding Path="SomeDataModelProperty" />
            <Binding RelativeSource="{RelativeSource Self}" Path="ActualWidth" />
            <!-- Other bindings -->
        </MultiBinding>
    </DataGridTextColumn.Binding>
</DataGridTextColumn>

The binding on the SortMemberPath is such that I can sort by the property in my DataContext. However, I get an error on the output window

Cannot find governing FrameworkElement or FrameworkContentElement for target element.

Googling this issue yields a result using DXGrid by DevExpress, but not one using the standard WPF data grid. Does anyone know the correct way to provide the sorting to the data grid column?

Answer 1

I figured it out, thanks to this article. In the end it is quite simple;

<DataGridTextColumn x:Name="Column1"
                    SortMemberPath="SomeDataModelProperty">

i.e. don't use a binding, just specify the property name directly.