remove an item form a Listbox @windows phone 7

hey, i m trying sice few days to remove an item from a databinded listbox while using the contectmenu toolkit. the remove method ask me to insert the name of an item but i couldnt find it.

here is the function for adding the item

{
    开发者_如何学运维            listObjetDevis.Add(new itemListBoxSave { 
                 devis = tbCreerDevis.Text });

                IsolatedStorageHelper.SaveObject("devis", listObjetDevis);
            }

thx for help

Here's a simple example of how to do this which you should be able to customize to your own project/needs.

1. Create a new DataBound application.

2. Add a reference to the toolkit.

3. Add the following to the XAML declaration of MainPage:

   xmlns:toolkit="clr-namespace:Microsoft.Phone.Controls;assembly=Microsoft.Phone.Controls.Toolkit"

4. Change the ListBox.ItemTemplate to the following:

   <DataTemplate>
       <StackPanel Margin="0,0,0,17" Width="432">
           <toolkit:ContextMenuService.ContextMenu>
               <toolkit:ContextMenu>
                   <toolkit:MenuItem Header="delete" Click="ContextMenuDelete_Click"/>
               </toolkit:ContextMenu>
           </toolkit:ContextMenuService.ContextMenu>
           <TextBlock Text="{Binding LineOne}" TextWrapping="Wrap" Style="{StaticResource PhoneTextExtraLargeStyle}"/>
           <TextBlock Text="{Binding LineTwo}" TextWrapping="Wrap" Margin="12,-6,12,0" Style="{StaticResource PhoneTextSubtleStyle}"/>
       </StackPanel>
   </DataTemplate>
   

5. Add the following event handler to the code behind:

private void ContextMenuDeleteClick(object sender, RoutedEventArgs e)
{
    App.ViewModel.Items.Remove((sender as MenuItem).DataContext as ItemViewModel);
}

Just to state the obvious: if you're using listObjetDevis.Add to add an item, wouldn't you want to use listObjetDevis.RemoveAt(list.SelectedIndex) or listObjetDevis.Remove(list.SelectedItem) to remove the item?