VB.NET Enable AutoFilter in protected Excel

Question

I'm trying to enable the filter option when protecting the worksheet but I couldn't able to.

         If Trial Then
             'add filter on header
             oSheet.Range("A2").AutoFilter()
             oSheet.EnableAutoFilter = True
             oSheet.Range("A1:A1").Style.Locked = True
             oSheet.Protect("SamplePassword")
         Else
             oSheet.Range("A1:" & colAlpha & count).AutoFilter()
         End If

This is the option I want to enable - which allow the user to filter even the Excel is protected.

As you can see, I tried to apply [EnableAutoFilter] in my code but it does not work. Below is my sample result

The filter has applied, but I couldn't select to filter - only default to all. Please let me know if you have done something similar before, I've been trying to google all day long and still no luck. Much appreciate!

Answer 1

I've done some additional research and found out there is a method applicable to the above question

Worksheet.Protect method

As here mentioned, instead of just applying Protect("Password"), you can define different types of parameters, as below:

oSheet.Protect("SamplePassword", False, True, True, True, False, False, False, False, False, False, False, False, False, True, False)

and refer to the documentation for reference to turn on / off on "Setting"