Why no content after add items to ListView?

Originally, i am dealing with multiple column of listbox, however listbox do not have multiple column

then i change to use listview

<ListView Name="listboxListBox1" DataContext="{Binding Stock}" Grid.Column="1" Height="100" Width="280" Margin="6" HorizontalAlignment="Left" ScrollViewer.VerticalScrollBarVisibility="Visible"><ListView.View><GridView><GridViewColumn Header="Name" Width="100"><GridViewColumn.CellTemplate><DataTemplate><TextBlock Name="Name" 
                                     Text="{Binding Path=Name}" /></DataTemplate></GridViewColumn.CellTemplate></GridViewColumn><GridViewColumn Header="Value" Width="100"><GridViewColumn.CellTemplate><DataTemplate><TextBlock Name="Value2" 
                                    Text="{Binding Path=Value2}" /></DataTemplate></GridViewColumn.CellTemplate></GridViewColumn></GridView></ListView.View></ListView></Grid>

public class Stock : INotifyPropertyChanged
    {
        private string name;
        private string value2;

        public Stock()
        {

        }

        public string Name
        {
            get
            {
                return name;
            }
            set
            {
                if (Name != value)
                {
                    name = value;
                    OnPropertyChanged("Name");
                }
            }
        }

        public string Value2
        {
            get
            {
                return value2;
            }
            set
            {
                if (Value2 != value)
                {
                    value2 = value;
                    OnPropertyChanged("Value2");
                }
            }
        }
        public event PropertyChangedEventHandler PropertyChanged;
        private void OnPropertyChanged(String info)
        {
            PropertyChangedEventHandler handler = PropertyChanged;
            if (handler != null)
            {
                handler(this, new PropertyChangedEventArgs(info));
            }
        }
    }



public partial class ListBoxOfItemsControl : AbstractControlClass
    {
        public ObservableCollection<Stock> Stock { get; set; }
        public ListBoxOfItemsControl instance;
        public ListBoxOfItemsControl()
        {
            InitializeComponent();
            listboxListBox1.SelectionMode = SelectionMode.Multiple;

            if (Stock == null)
                Stock = new ObservableCollection<Stock>();


            DataContext = this;
        }
        public ListBoxOfItemsControl getInstance()
        {
            if (instance == null)
                instance = new ListBoxOfItemsControl();
            return instance;
        }
        public override void InitializeControls(int i, Control o, DataTable dt)
        {
            ListBoxOfItemsControl oo = (ListBoxOfItemsControl)o;
            oo.Name = dt.Rows[i].ItemArray[(int)ItemsControlFactory.ReportUIColumn.Name].ToString().Trim();
            oo.listboxlabel1.Content = dt.Rows[i].ItemArray[(int)ItemsControlFactory.ReportUIColumn.LabelText].ToString().Trim();

            List<String> selecteditems = new List<String>();
            DataTable extensiondt = DataAccessLayer.getTable("ReportUIExtension", "", selecteditems, "E01");

            List<String> DBF_FUNDselecteditems = new List<String>();
            DBF_FUNDselecteditems.Add(dt.Rows[i].ItemArray[(int)ItemsControlFactory.ReportUIColumn.ListBoxKeyColumnName].ToString().Trim());
            DBF_FUNDselecteditems.Add(dt.Rows[i].ItemArray[(int)ItemsControlFactory.ReportUIColumn.ListBoxValueColumnName].ToString().Trim());
            DataTable DBF_FUND = DataAccessLayer.getTable(dt.Rows[i].ItemArray[(int)ItemsControlFactory.ReportUIColumn.ControlTableName].ToString().Trim(), "", DBF_FUNDselecteditems, "");

            for (int j = 0; j < DBF_FUND.Rows.Count; ++j)
            {
                Stock s = new Stock();
                s.Name = DBF_FUND.Rows[j].ItemArray[0].ToString().Trim();
                s.Value2 = DBF_FUND.Rows[j].ItemArray[1].ToString().Trim();
                Stock.Add(s);
            }
        }
        public override void InitializeaddValuesToReportParameter(ref ReportCriteria rc, Hashtable controlHashTable, int i, Control o, DataTable dt)
        {
            ListBox listboxobj = ((ListBoxOfItemsControl)controlHashTable[dt.Rows[i].ItemArray[(int)ItemsControlFactory.ReportUIColumn.Name].ToString().Trim()]).listboxListBox1;
            List<String> multipleValueResult = new List<String>();
            for (int k = 0; k < listboxobj.SelectedItems.Count; ++k)
            {
                multipleValueResult.Add(listboxobj.SelectedItems[k].ToString());
            }
            if (multipleValueResult != null)
                rc.AddEntry(dt.Rows[i].ItemArray[(int)ItemsControlFactory.ReportUIColumn.ItemType1].ToString().Trim(), multipleValueResult, "xs:string");
        }
        public override String GetValue()
        {
            String result = "";
            for (int i = 0; i < listboxListBox1.SelectedItems.Count; ++i)
            {
                if(String.IsNullOrEmpty(result))
                    result = listboxListBox1.SelectedItems[i].ToString();
                else
                    result = result+ "," + listboxListBox1.SelectedItems[i].ToString();
            }
            return result;
        }
    }

No need to worry as many books are not the core and true story