As per the functionalities available for sheets in Qliksense,You cant display the filters in the exported pdf file,For showing the same you have to select story option,in which you can take the screenshot of your dashboard with selected filters with resultant data,then you will be get your required output..
Thank you for your response, it has been very helpful. The fact is that with this kind of function, i cant see the selection that I've done.
During visualisation, If I make a selection inside a filter, the function GetCurrentSelections shows me the selected values. Despite this behavior during visualisation, once I made the conversion into a PDF file, the function GetCurrentSelections isn't available