thanks for your answer, I need to be more precise.
the use case is, that the end user is able to upload an excel file directly from the dashboard via "Upload" Button.
Imagine a dashboard with invoices and the end user receives an excel with new invoices and saves the excel in a local folder. In his invoices dashboard he has a button "upload new invoices" and when pressing this button, a file dialog appears to choose the excel from his local folder. The excel always has the same format, so assume that it can be loaded. Within the workflow the app reloads after choosing the file.