I receive an output in “mht”, saving it using IO no problem, then open it using excel so problem too. Trying to open it through aspose I got a problem regarding using LoadOption as XLS or MHT, it give the same problem:
System.Convert.FromBase64String(String s) at ..(Stream , String ,
String , Encoding ) at ..(StreamReader , Encoding ) at
..(Stream , Encoding ) at ..(Stream , Workbook , LoadOptions )
at Aspose.Cells.Workbook.(Stream , LoadOptions , Boolean ) at
Aspose.Cells.Workbook.(String , LoadOptions ) at
Aspose.Cells.Workbook…ctor(String file, LoadOptions loadOptions).