Sort ObservableCollection through C#

by

Introduction

Basically, if there is a need to display a sorted collection, please consider using the CollectionViewSource class: assign (“bind”) its Source property to the source collection — an instance of the ObservableCollection<T> class.

The idea is that CollectionViewSource class provides an instance of the CollectionView class. This is kind of “projection” of the original (source) collection, but with applied sorting, filtering, etc.

References:

Live Shaping

WPF 4.5 introduces “Live Shaping” feature for CollectionViewSource.

References:

Solution

If there still a need to sort an instance of the ObservableCollection<T> class, here is how it can be done.
The ObservableCollection<T> class itself does not have sort method. But, the collection could be re-created to have items sorted:

// Animals property setter must raise "property changed" event to notify binding clients.
// See INotifyPropertyChanged interface for details.
Animals = new ObservableCollection<string>
    {
        "Cat", "Dog", "Bear", "Lion", "Mouse",
        "Horse", "Rat", "Elephant", "Kangaroo",
        "Lizard", "Snake", "Frog", "Fish",
        "Butterfly", "Human", "Cow", "Bumble Bee"
    };
...
Animals = new ObservableCollection<string>(Animals.OrderBy(i => i));

Additional details

Please note that OrderBy() and OrderByDescending() methods (as other LINQ–extension methods) do not modify the source collection! They instead create a new sequence (i.e. a new instance of the class that implements IEnumerable<T> interface). Thus, it is necessary to re-create the collection.

More Related Contents:

  1. How do I sort an observable collection?
  2. Merge two arrays and return sorted array in c# [closed]
  3. C# List sorting with multiple range
  4. How do you sort a dictionary by value?
  5. How do I update an ObservableCollection via a worker thread?
  6. Sort a list from another list IDs
  7. Best way to randomize an array with .NET
  8. Sorting rows in a data table
  9. Optimal LINQ query to get a random sub collection – Shuffle
  10. Notify ObservableCollection when Item changes
  11. List OrderBy Alphabetical Order
  12. String sorting issue in C#
  13. Sorting an array of folder names like Windows Explorer (Numerically and Alphabetically) – VB.NET
  14. How to sort depended objects by dependency
  15. How to make ObservableCollection thread-safe?
  16. Using BindingOperations.EnableCollectionSynchronization
  17. How to sort TreeView items using SortDescriptions in Xaml?
  18. Sort a Custom Class List
  19. LINQ order by null column where order is ascending and nulls should be last
  20. How would I sort a list of files by name to match how Windows Explorer displays them?
  21. How to sort two arrays by same index?
  22. Is there a sorted collection type in .NET?
  23. BindingList.Sort() to behave like a List.Sort()
  24. how to sort a collection by datetime in c#
  25. Why does the default string comparer fail to maintain transitive consistency?
  26. C#: Custom sort of DataGridView
  27. Better way to sort array in descending order
  28. Sort dataGridView columns in C# ? (Windows Form)
  29. Use LINQ to move item to top of list
  30. Is it wrong to use the Dispatcher within my ViewModel?

Leave a Comment