How to change tabletools property value dynamically?

Question

Hello Friends,
 I am using Jquery datatable in MVC. I need to export table to export excel with "All" & Displayed option. I have dropdown with "all" & "displayed" option. Based on the dropdown value changed need to set tabletools property "oSelectorOpts" value in datatable. 

 Simply I need to export data to excel with "All" & "Displayed" record for any kind of situation like sorted record, searched record...

 Can anyone give me your suggestions please

Thanks in advance...