新增一自增列

      /// <summary>
        /// 为m_DataTable新增一自增列
        /// </summary>
        private void AddAutoIncrementComunm()
        {
            DataColumn col = new DataColumn(NewColumnName, typeof(System.Int32));
            col.AutoIncrement = true;
            col.AutoIncrementSeed = 1;
            col.AutoIncrementStep = 1;
            m_DataTable.Columns.Add(col);
            //循环为新增列的每一行赋值
            for (int i = 0; i < m_DataTable.Rows.Count; i++)
            {
                m_DataTable.Rows[i][NewColumnName] = i + 1;
            }
        }