CellTemplate is not working when ItemsSource as DataTable

[Thangalskhmi]

Hi,

I have referred  the sample( http://www.telerik.com/community/forums/wpf/gridview/can-t-use-celledittemplateselector-amp-celltemplateselector-together.aspx) for setting CellTemplate by using CellTemplateSelector.

I modified this sample to use DataTable as source instead of List<Item>(). In this case, i am not able to see any data in the second column of the Grid.

The code i have changed is:
public MainWindow()
{
InitializeComponent();
//List<Item> items = new List<Item>();
            //items.Add(new Item() { PropertyName = "Property1", PropertyType = typeof(string), PropertyValue = "blabla" });
            //items.Add(new Item() { PropertyName = "Property1", PropertyType = typeof(Visibility), PropertyValue = Visibility.Visible });

            DataTable items = new DataTable();
            items.Columns.Add("PropertyName");
            items.Columns.Add("PropertyType",typeof(Type));
            items.Columns.Add("PropertyValue");
            DataRow row1 = items.NewRow();
            row1[0] = "Property1";
            row1[1] = typeof(string);
            row1[2] = "blabla";
            items.Rows.Add(row1);
            row1 = items.NewRow();
            row1[0] = "Property1";
            row1[1] = typeof(Visibility);
            row1[2] = Visibility.Visible;
            items.Rows.Add(row1);         
this.dataGrid1.ItemsSource = items;
}

class PropertyValueDataTemplateSelector:
public override System.Windows.DataTemplate SelectTemplate(object item, System.Windows.DependencyObject container)
{
           var r= item as System.Data.DataRow;
           Type value= r["PropertyType"] as Type;
           if (value == typeof(string))
                return this.TextTemplate;
            else
                return this.EnumTemplate;
}

Not able to figure out what is the issue.
Please give updated sample using DataTable as ItemSource.
Thanks for your help.