datatable拆分多个

/// <summary>
        /// 分解数据表
        /// </summary>
        /// <param name="originalTab">需要分解的表</param>
        /// <param name="rowsNum">每个表包含的数据量</param>
        /// <returns></returns>
        public static List<DataTable> SplitDataTable(DataTable originalTab, int rowsNum)
        {
            //获取所需创建的表数量
            int tableNum = originalTab.Rows.Count / rowsNum;
            //获取数据余数
            int remainder = originalTab.Rows.Count % rowsNum;
            List<DataTable> ds = new List<DataTable>();
            //如果只需要创建1个表，直接将原始表存入DataSet
            if (tableNum == 0)
            {
                ds.Add(originalTab);
            }
            else
            {
                DataTable[] tableSlice = new DataTable[tableNum];
                for (int c = 0; c < tableNum; c++)
                {
                    tableSlice[c] = new DataTable();
                    foreach (DataColumn dc in originalTab.Columns)
                    {
                        tableSlice[c].Columns.Add(dc.ColumnName, dc.DataType);
                    }
                }
                for (int i = 0; i < tableNum; i++)
                {
                    if (i != tableNum - 1)
                    {

                        for (int j = i * rowsNum; j < ((i + 1) * rowsNum); j++)
                        {
                            tableSlice[i].ImportRow(originalTab.Rows[j]);
                        }
                    }
                    else
                    {
                        for (int k = i * rowsNum; k < ((i + 1) * rowsNum + remainder); k++)
                        {
                            tableSlice[i].ImportRow(originalTab.Rows[k]);
                        }
                    }
                }               
                foreach (DataTable dt in tableSlice)
                {
                    ds.Add(dt);
                }
            }
            return ds;
        }