WPF ComboBox select item when using ItemsSource

I have a WPF ComboBox that is databound to a Linq query.

var mylinqdata = from d in DataTable0.AsEnumerable()

select new

{

Status = d.Field<string>(0).Trim(),

Progress = d.Field<string>(1).Trim()

};

dlg.cb_Status.ItemsSource = mylinqdata;

When data is bound to a WPF control using ItemsSource you must change the selected item using SelectedIndex. Here is the code I use.

dlg.cb_Status.SelectedIndex = mylinqdata.ToList().FindIndex(d => d.Status == loom.Status);

Here is the XAML of the ComboBox

<ComboBox Name="cb_Status">
    <ComboBox.ItemTemplate>
        <DataTemplate>
            <TextBlock Text="{Binding Path=Progress}"></TextBlock>
        </DataTemplate>
    </ComboBox.ItemTemplate>
</ComboBox>