Although the DevExpress ASP.NET Spreadsheet (ASPxSpreadsheet) provides a built-in means to manage (create, open and save) files via the File ribbon tab, an external file management control can also be used with the Spreadsheet.
This demo illustrates how to use an external ASPxFileManager control to navigate a document hierarchy and select a file to open. Documents can be opened from a specific folder on the server ("DocumentBrowsing"), and can also be uploaded to this folder from an end-user's computer. The selected document is opened within the ASPxSpreadsheet by using the Open method.