We are trying to merge 2 or more .xlsx file into a single workbook with multiple sheets (one for each sheet in the input workbook files).
There is an example program in the \Aspose.Cells-for-.NET-master\Examples\Data\CellsHelperClass\MergeFiles folder with the following code snippet:
// Merge the files in the output file. Supports only .xls files
CellsHelper.MergeFiles(files, cacheFile, dest);
the problem is it only supports .xls files. Is there a way to do this for .xlsx files as well?