This is a demonstration of Excel formats supported by RadGrid (HTML, ExcelML and BIFF).They are all based on different standards and specifications so there are differences in the supported features.
You can use the external buttons or the built-in button (BIFF format) in the command item to export the grid to Excel.
Below you can find a brief description of these three Excel formats.
This format is based on the Microsoft Office HTML format. It can be styled via both inline CSS and stylesheets.
Based on the Microsoft Office XML speardsheet format. Supports styling through server-side API, compatible with the original specification.
Microsoft's binary XLS format is called BIFF. It has a convenient server-side API and is based on the Export Infrastructure which means that you have complete control over the exported content.
XLSX format is the latest export format. It is based on the Telerik document processing libraries which allow you to export RadGrid in Excel xlsx format introduced by Microsoft in Excel 2007.