I'm trying to read an Excel file with extension .xlsx which is created using Spreadsheetgear2017 and I'm getting an exception stating Corrupt open XML file.
Here I'm sure that the sheet doesnt contain any Cell comments and form controls as the sheet itself was created using Spreadsheetgear2017.
I tried to save the file in .xls format but when I open the downloaded file, there is a popup stating "The file format and extension of filename.xls file don't match. The file could be corrupted."
Here I'm using GetWorkBook(value) method.
where am I missing out ?