DataGrid Combobox SelectedValue

Question

I've written a simple example in which a DataGrid on a WPF form is populated entirely from the codebehind. A DataGridTemplateColumn with a ComboBox has the ItemsSource set to a DummyClass that contains two properties for the DisplayMember and the SelectedValue .

A DataTable is populated with a single column with two rows . The ItemsSource for the DataGrid is set to the default view of the DataTable .

When the code runs, each ComboBox in the DataGrid displays correctly and has the proper options available in the dropdown but does not display the values from the DataTable .

What binding am I missing to connect the ComboBox SelectedValue to the values from the DataTable ?

 public partial class MainWindow : Window
 {
    public class DummyClass
    {
        public int SelectedValue { get; set; }
        public string DisplayValue { get; set; }
    }

    public ObservableCollection<DummyClass> DummyClassCollection;

    public MainWindow()
    {
        InitializeComponent();

        DummyClassCollection = new ObservableCollection<DummyClass>();

        DummyClassCollection.Add(new DummyClass() { DisplayValue = "Item1", SelectedValue = 0 });
        DummyClassCollection.Add(new DummyClass() { DisplayValue = "Item2", SelectedValue = 1 });
        DummyClassCollection.Add(new DummyClass() { DisplayValue = "Item3", SelectedValue = 2 });

        DataGridTemplateColumn templateColumn = new DataGridTemplateColumn();
        DataTemplate dataTemplate = new DataTemplate();
        FrameworkElementFactory control = new FrameworkElementFactory(typeof(ComboBox));

        control.SetValue(ComboBox.ItemsSourceProperty, DummyClassCollection);
        control.SetValue(ComboBox.DisplayMemberPathProperty, "DisplayValue");            

        //
        //Some binding to connect ComboBox Selectedvalue to DataTable values
        //

        dataTemplate.VisualTree = control;
        templateColumn.CellTemplate = dataTemplate;
        templateColumn.Header = "DummyColumn";            
        dgGrid.Columns.Add(templateColumn);

        DataTable table = new DataTable();
        table.Columns.Add("DummyColumn");
        table.Rows.Add(1);
        table.Rows.Add(2);

        dgGrid.AutoGenerateColumns = false;
        dgGrid.ItemsSource = table.DefaultView;

    }
}    

Answer 1

Here is all you need...

        control.SetValue(ComboBox.DisplayMemberPathProperty, "DisplayValue");
        control.SetValue(ComboBox.SelectedValuePathProperty, "SelectedValue");
        control.SetValue(ComboBox.SelectedValueProperty, new Binding("DummyColumn"));