在sharepoint上自动刷新Excel工作表

I have a setup on sharepoint with an excel data file linked to another excel file containing charts and pivot tables based on this first file. Both files are saved together in a shared folder. I then have a site page which contains the pivots and charts displayed as web parts. I want to be able to refresh only the data file and then see the pivot file and subsequent sit page update without having to open and click refresh on any of the files.I have a setup on sharepoint with an excel data