<span style="font-size:14px;">class Order
    {
        /// <summary>
        /// 对二维数组排序
        /// </summary>
        /// <param name="values">排序的二维数组</param>
        /// <param name="orderColumnsIndexs">排序根据的列的索引号数组</param>
        /// <param name="type">排序的类型，1代表降序，0代表升序</param>
        /// <returns>返回排序后的二维数组</returns>
        public static object[,] Orderby(object[,] values, int[] orderColumnsIndexs, int type)
        {
            object[] temp = new object[values.GetLength(1)];
            int k;
            int compareResult;
            for (int i = 0; i < values.GetLength(0); i++)
            {
                for (k = i + 1; k < values.GetLength(0); k++)
                {
                    if (type.Equals(1))
                    {
                        for (int h = 0; h < orderColumnsIndexs.Length; h++)
                        {
                            compareResult = Comparer.Default.Compare(GetRowByID(values, k).GetValue(orderColumnsIndexs[h]), GetRowByID(values, i).GetValue(orderColumnsIndexs[h]));
                            if (compareResult.Equals(1))
                            {
                                temp = GetRowByID(values, i);
                                Array.Copy(values, k * values.GetLength(1), values, i * values.GetLength(1), values.GetLength(1));
                                CopyToRow(values, k, temp);
                            }
                            if (compareResult != 0)
                                break;
                        }
                    }
                    else
                    {
                        for (int h = 0; h < orderColumnsIndexs.Length; h++)
                        {
                            compareResult = Comparer.Default.Compare(GetRowByID(values, k).GetValue(orderColumnsIndexs[h]), GetRowByID(values, i).GetValue(orderColumnsIndexs[h]));
                            if (compareResult.Equals(-1))
                            {
                                temp = GetRowByID(values, i);
                                Array.Copy(values, k * values.GetLength(1), values, i * values.GetLength(1), values.GetLength(1));
                                CopyToRow(values, k, temp);
                            }
                            if (compareResult != 0)
                                break;
                        }
                    }
                }
            }
            return values;

        }
        /// <summary>
        /// 获取二维数组中一行的数据
        /// </summary>
        /// <param name="values">二维数据</param>
        /// <param name="rowID">行ID</param>
        /// <returns>返回一行的数据</returns>
        static object[] GetRowByID(object[,] values, int rowID)
        {
            if (rowID > (values.GetLength(0) - 1))
                throw new Exception("rowID超出最大的行索引号!");

            object[] row = new object[values.GetLength(1)];
            for (int i = 0; i < values.GetLength(1); i++)
            {
                row[i] = values[rowID, i];

            }
            return row;

        }
        /// <summary>
        /// 复制一行数据到二维数组指定的行上
        /// </summary>
        /// <param name="values"></param>
        /// <param name="rowID"></param>
        /// <param name="row"></param>
        static void CopyToRow(object[,] values, int rowID, object[] row)
        {
            if (rowID > (values.GetLength(0) - 1))
                throw new Exception("rowID超出最大的行索引号!");
            if (row.Length > (values.GetLength(1)))
                throw new Exception("row行数据列数超过二维数组的列数!");
            for (int i = 0; i < row.Length; i++)
            {
                values[rowID, i] = row[i];
            }
        }
    }</span>

<span style="font-size:14px;">static void Main(string[] args)
        {
            object[,] o = new object[6, 4] { { 1, 2, 3, 4 }, { 5, 6, 7, 8 }, { 9, 10, 11, 12 }, { 13, 14, 11, 12 }, { 15, 16, 11, 17, }, { 5, 6, 7,9 } };

            Console.WriteLine("没排序前的二维数组：");
            Print(o);

            Console.WriteLine("根据第3,4列升序排序后的数组：");
            Order.Orderby(o, new int[] { 2,3 },0);
            Print(o);

            Console.WriteLine("根据第3,4列降序序排序后的数组：");
            Order.Orderby(o, new int[] { 2, 3 }, 1);
            Print(o);
           
            Console.Read();

        }
        static void Print(object[,] values)
        {
            int k;
            for (int i = 0; i < values.GetLength(0);i++ )
            {
                for (k = 0; k < values.GetLength(1);k++ )
                {
                    Console.Write(values[i,k]);
                    Console.Write("  ");
                }
                Console.WriteLine(" ");
            }
        }</span>

没排序前的二维数组：
1 2 3 4
5 6 7 8
9 10 11 12
13 14 11 12
15 16 11 17
5 6 7 9
根据第3,4列升序排序后的数组：
1 2 3 4
5 6 7 8
5 6 7 9
13 14 11 12
9 10 11 12
15 16 11 17
根据第3,4列降序序排序后的数组：
15 16 11 17
9 10 11 12
13 14 11 12
5 6 7 9
5 6 7 8
1 2 3 4

原文地址：http://www.cnblogs.com/xuanfeng/archive/2008/11/20/1334636.html