Import and export Microsoft Excel workbooks in high-fidelity, with a compiled assembly that reads and writes in the widely-interoperable XLS/XLSX file format. Your web application can run completely independently of Excel.
Flip simple shape types horizontally or vertically, or change their outline or fill colors.
Bring the portability of workbook files in Microsoft Excel 2010 compatible file formats (.XLS, .XLSX and ExcelML) that run independently of Microsoft Excel, so it does not need to be installed on the client or server.
This is neither a wrapper around native OLE file system libraries, nor a callback to server-side code.