Numbered listbox

by

Finally! If found a way much more elegant and probably with better performance either.
(see also Accessing an ItemsControl item as it is added)

We “misuse” the property ItemsControl.AlternateIndex for this. Originally it is intended to handle every other row within a ListBox differently. (see http://msdn.microsoft.com/en-us/library/system.windows.controls.itemscontrol.alternationcount.aspx)

1. Set AlternatingCount to the amount of items contained in the ListBox

<ListBox ItemsSource="{Binding Path=MyListItems}"
         AlternationCount="{Binding Path=MyListItems.Count}"
         ItemTemplate="{StaticResource MyItemTemplate}"
...
/>

2. Bind to AlternatingIndex your DataTemplate

<DataTemplate x:Key="MyItemTemplate" ... >
    <StackPanel>
        <Label Content="{Binding RelativeSource={RelativeSource TemplatedParent}, Path=TemplatedParent.(ItemsControl.AlternationIndex)}" />
        ...
    </StackPanel>
</DataTemplate>

So this works without a converter, an extra CollectionViewSource and most importantly without brute-force-searching the source collection.

More Related Contents:

  1. disable mouse wheel on itemscontrol in wpf
  2. WPF Binding a ListBox to an enum, displaying the Description Attribute
  3. ListBox items return string, when DataTemplate is Button
  4. Selecting a Textbox Item in a Listbox does not change the selected item of the listbox
  5. How to support ListBox SelectedItems binding with MVVM in a navigable application
  6. Accessing the ScrollViewer of a ListBox from C#
  7. WPF Filter a ListBox
  8. WPF MVVM navigate views
  9. Delete a file being used by another process
  10. Globally catch exceptions in a WPF application?
  11. Accessing UI (Main) Thread safely in WPF
  12. Metadata file ‘.dll’ could not be found
  13. Options for embedding Chromium instead of IE WebBrowser control with WPF/C# [closed]
  14. Implement Validation for WPF TextBoxes
  15. Close Window from ViewModel [duplicate]
  16. How to render a WPF UserControl to a bitmap without creating a window
  17. How to write a ViewModelBase in MVVM
  18. WPF C#: Rearrange items in listbox via drag and drop
  19. Use StringFormat to add a string to a WPF XAML binding
  20. How can I set the color of a selected row in DataGrid
  21. Accessing properties through Generic type parameter
  22. Should I bind to ICollectionView or ObservableCollection
  23. Mutually exclusive checkable menu items?
  24. Programmatically changing button icon in WPF
  25. WPF TextBlock highlight certain parts based on search condition
  26. How do you do transition effects using the Frame control in WPF?
  27. Get selected value from combo box in C# WPF
  28. How does one “disable” a button in WPF using the MVVM pattern?
  29. WPF – converting Bitmap to ImageSource
  30. WPF – Remove focus when clicking outside of a textbox

Leave a Comment