BindingList.Sort() to behave like a List.Sort()

Question

I am attempting to write a SortableBindingList that I can use for my application. I have found lots of discussion about how to implement basic sorting support so that the B

Answer 1

I had the same problem and this post helped me solve it!

As I implemented this solution (based on Marc's and Paul's code) as an extension and added two simple sort methods, I would like to share it with you:

public static void SortAscending(this BindingList bindingList, Func sortProperty)
    {
        bindingList.Sort(null, (a, b) => ((IComparable
)sortProperty(a)).CompareTo(sortProperty(b)));
    }
    public static void SortDescending(this BindingList bindingList, Func sortProperty)
    {
        bindingList.Sort(null, (a, b) => ((IComparable
)sortProperty(b)).CompareTo(sortProperty(a)));
    }
    public static void Sort(this BindingList bindingList)
    {
        bindingList.Sort(null, null);
    }
    public static void Sort(this BindingList bindingList, IComparer comparer)
    {
        bindingList.Sort(comparer, null);
    }
    public static void Sort(this BindingList bindingList, Comparison comparison)
    {
        bindingList.Sort(null, comparison);
    }
    private static void Sort(this BindingList bindingList, IComparer p_Comparer, Comparison p_Comparison)
    {

       //Extract items and sort separately
        List sortList = new List();
        bindingList.ForEach(item => sortList.Add(item));//Extension method for this call
        if (p_Comparison == null)
        {
            sortList.Sort(p_Comparer);
        }//if
        else
        {
            sortList.Sort(p_Comparison);
        }//else

        //Disable notifications, rebuild, and re-enable notifications
        bool oldRaise = bindingList.RaiseListChangedEvents;
        bindingList.RaiseListChangedEvents = false;
        try
        {
        bindingList.Clear();
        sortList.ForEach(item => bindingList.Add(item));
        }
        finally
        {
        bindingList.RaiseListChangedEvents = oldRaise;
        bindingList.ResetBindings();
        }

    }

    public static void ForEach(this IEnumerable source, Action action)
    {
        if (source == null) throw new ArgumentNullException("source");
        if (action == null) throw new ArgumentNullException("action");

        foreach (T item in source)
        {
            action(item);
        }
    }

Hope this is helpful.