User parameter - how to feed data

Hello everybody,

I am trying to build a flow app: 

• The user has an Excel file with 3 columns. 
• the flow app must show the values of theses columns as one parameter (I want to have the chance to filter the list using one of the 3 columns). 

My Problem is to get the contents of the excel file. If I try it with the User Paramters Window, I can import from dataset or reader formats. But with these options I do not get the contents but the headers or the name of the readers.

I can save the contents of the File in a SQL Database. But I do not know how I can read them and show them in the user parameter List.

Has anyone any Idea, how I can get a List with a filter to show those values of the excel?

Thanks in advance!

Manuel