DataTable 实现行列转换

  /// <summary>
        /// 将DataTable行列转换
        /// </summary>
        /// <param name="src">要转换的DataTable</param>
        /// <param name="columnHead">要作为Column的哪列</param>
        /// <returns></returns>
        public static DataTable Col2Row(DataTable src, int columnHead)
        {
            DataTable result = new DataTable();
            DataColumn myHead = src.Columns[columnHead];
            result.Columns.Add(myHead.ColumnName);
            for (int i = 0; i < src.Rows.Count; i++)
            {
                result.Columns.Add(src.Rows[i][myHead].ToString());
            }
            //
            foreach (DataColumn col in src.Columns)
            {
                if (col == myHead)
                    continue;
                object[] newRow = new object[src.Rows.Count + 1];
                newRow[0] = col.ColumnName;
                for (int i = 0; i < src.Rows.Count; i++)
                {
                    newRow[i + 1] = src.Rows[i][col];
                }
                result.Rows.Add(newRow);
            }
            return result;
        }

        public static DataTable Col2Row(DataTable src, string columnHead)
        {
            for (int i = 0; i < src.Columns.Count; i++)
            {
                if (src.Columns[i].ColumnName.ToUpper () == columnHead.ToUpper())
                    return Col2Row(src, i);
            }
            return new DataTable();
        }