GroupDocs.Metadata for .NET provides functionality that allows working with different kinds of spreadsheet formats such as XLS, XLSX, ODS, etc. For the full list of supported document formats please refer to Supported Document Formats.
Detecting the exact type of a document The following sample of code will help you to detect the exact type of a loaded spreadsheet and extract some additional file format information.
Load a Spreadsheet document Extract the root metadata package Use the FileType property to obtain file format information AdvancedUsage....Signature Product Solution GroupDocs...information about digital signatures associated with a spreadsheet...