How to Pass where Condition through Getasync to execute & get the Result in rest API c#

I need to pass the where Condition from xamarin forms (C#) HttpClient for my SQL query which is running on asp.net Web API. Like

select * from salesdetails where locationcode = 4 and entrydate between '1/jul/2017' and '31/jul/2017'

I need to pass the where Condition from using c# HttpClient in xamarin forms. How to do this ??