如何以编程方式设置 RadGridView 列的值

我有一个 RadGridView，只要用户单击Insert按钮，我就想为新生成的行设置Date列的值。如何将其值设置为 System.Date.Today ？

Xaml for RadGridview：

<telerik:RadGridView VerticalAlignment="Top" 
                      Name="grdProductGrid"
                      AutoGenerateColumns="False"
                      RowEditEnded="OnRowEditEnded"
                      CellValidating="OnCellValidating"
                      BeginningEdit="OnBeginningEdit">
    <telerik:RadGridView.Columns>
        <telerik:GridViewDataColumn x:Name="ID" 
                                DataMemberBinding="{Binding ProductID}" 
                                Header="ID" />
        <telerik:GridViewDataColumn x:Name="Code" 
                                DataMemberBinding="{Binding Code}" 
                                Header="Code" />
        <telerik:GridViewDataColumn x:Name="Date" 
                                DataMemberBinding="{Binding Path=Date, Mode=OneWay, StringFormat='{}{0:dd/MM/yyyy}'}" 
                                Header="Effective from" />
    </telerik:RadGridView.Columns>
</telerik:RadGridView>

和Insert单击事件处理程序：

private void OnInsertClick(object sender, RoutedEventArgs e)
{
  this.grdProductGrid.BeginInsert();
}

private void YourRadGridView_AddingNewDataItem(object sender, 
    Telerik.Windows.Controls.GridView.GridViewAddingNewEventArgs e)
{
    YourObjectModel newItem = new YourObjectModel();
    newItem.Date = DateTime.Now;
    e.NewObject = newItem;
}