你可以试下用Free Spire.XLS来读取Excel中的超链接
http://www.e-iceblue.cn/spirexls/read-hyperlinks-in-excel.html

你先判断下这几行，是不是合并单元格，应该是这几行合并到一起了

cell.IsMergedCell

        /// <summary>
        /// 获取合并单元格的值
        /// </summary>
        /// <param name="sheet"></param>
        /// <param name="rowIndex"></param>
        /// <param name="columnIndex"></param>
        /// <returns></returns>
        public static object GetFirstMergedValue(ISheet sheet, int rowIndex, int columnIndex)
        {
            ICell cell = sheet.GetRow(rowIndex).GetCell(columnIndex);
            if (null != cell && !cell.IsMergedCell)
            {
                return GetCellValue(cell);
            }
            object result = null;
            for (int i = 0; i < sheet.NumMergedRegions; i++)
            {
                CellRangeAddress cellrange = sheet.GetMergedRegion(i);
                if (columnIndex >= cellrange.FirstColumn && columnIndex <= cellrange.LastColumn && rowIndex >= cellrange.FirstRow && rowIndex <= cellrange.LastRow)
                {
                    ICell firstCell = sheet.GetRow(cellrange.FirstRow).GetCell(cellrange.FirstColumn);
                    result = GetCellValue(firstCell);
                    return result;
                }
            }
            return result;
        }