Quero obter o item selecionado na caixa de combinação wpf. Mas ele retorna System.Data.DataRowView. Meu código em xaml:

<ComboBox Name="ddDeputi" Margin="131,85,0,0" Width="327" HorizontalAlignment="Left" VerticalAlignment="Top" Height="22"
        SelectedValue="{Binding Path = kodeDep, ValidatesOnDataErrors=True, UpdateSourceTrigger=PropertyChanged}"
              Validation.ErrorTemplate="{x:Null}" SelectionChanged="ddDeputi_SelectionChanged" Loaded="ddDeputi_Loaded" />

E no meu .cs:

   private void ddDeputi_SelectionChanged(object sender, SelectionChangedEventArgs e)
    {

        if (ddDeputi.SelectedIndex != -1)
        {
            string akode = ddDeputi.SelectedValue.ToString();
            DaUnitKerja oDa = new DaUnitKerja();
            DataSet data = new DataSet();
            data = oDa.TampilDir(akode);
            ddDir.ItemsSource = data.Tables[0].DefaultView;
            ddDir.DisplayMemberPath = data.Tables[0].Columns["unit_kerja"].ToString();
            ddDir.SelectedValuePath = data.Tables[0].Columns["kode"].ToString();
            ddSubDir.SelectedIndex = -1;
            ComboBoxItem cbi = (ComboBoxItem)ddDeputi.ItemContainerGenerator.ContainerFromItem(ddDeputi.SelectedItem);
            txtDeputi.Text = cbi.Content.ToString();



        }
    }