ASP.NET DataGrid Extension [Client Side Sortable/Dragable....] - Part I

using System;
using System.Collections;
using System.Text;
using System.Web.UI.WebControls;

namespace CodeWorks
{
   
    public class ColumnComparer : IComparer
    {
        public ColumnComparer(string order)
        {
            ColumnsOrder = order.Split(',');
        }

        private string[] ColumnsOrder;
        int IComparer.Compare(object x, object y)
        {

            DataGridColumn dgcx = (DataGridColumn)x;
            int indexOfx = Array.IndexOf(ColumnsOrder, dgcx.HeaderText);

            DataGridColumn dgcy = (DataGridColumn)y;
            int indexOfy = Array.IndexOf(ColumnsOrder, dgcy.HeaderText);

            if (indexOfx < indexOfy)
                return -1;
            if (indexOfx == indexOfy)
                return 0;
            else
                return 1;
        }
    }

   
}