I tried to convert *.xls to *.html and it works. When I converted it back to *.xls, error appears:This file's format is not supported or you don't specify a correct format.
Here is my code:
Aspose.Cells.Workbook wb1 = new Aspose.Cells.Workbook();
Currently, Aspose.Cells doesn't support the conversion from HTML to XLS. We are working on this and we will release this feature in our future version.
Well, currently we are doing some important tasks regarding Excel 2007 file formats and after finishing them, we will start developing this feature. It will take around 2~3 months to complete this feature. We will update you after implementing this feature.