WPF DataGrid CustomSort for each Column

Question

I have a WPF DataGrid bound to a CollectionViewSource that encapsulates an ObservableCollection. This CollectionViewSource has two main objectives:

1) To group each

Answer 1

here is some extention to @trilson86 ICustomeSorter

that make the Sorter more generic to use

NumericComparer based on this resource

http://www.codeproject.com/Articles/11016/Numeric-String-Sort-in-C

public class GenericNumericComparer : ICustomSorter
{
    private PropertyInfo _propertyInfo;
    private Type _objectType;

    public string SortMemberPath { get; set; }

    private readonly NumericComparer _comparer = new NumericComparer();

    public Type ObjectType
    {
        get { return _objectType; }
        set
        {
            _objectType = value;

            if (_objectType != null) _propertyInfo = ObjectType.GetProperty(SortMemberPath);
        }
    }

    private int CompareHelper(object x, object y)
    {
        if (_propertyInfo != null)
        {
            var value1 = _propertyInfo.GetValue(x);
            var value2 = _propertyInfo.GetValue(y);

            return _comparer.Compare(value1, value2);
        }

        return 0;
    }

    public int Compare(object x, object y)
    {
        var i = CompareHelper(x, y);

        if (SortDirection == ListSortDirection.Ascending)
            return i;

        return i*-1;
    }

    public ListSortDirection SortDirection { get; set; }
}