How to call SQL procedure in c# without parameters

Question

I made a table whrere from I want to get sum of total days (din) group by PtR number. here is query: ALTER   PROCEDURE  getdays   @tr_ptr nvarchar(6), @tr_din nvarchar(2), @Total  int   output    AS    BEGIN    SELECT  Total =  SUM  ( CONVERT ( int , tr_din))  FROM  Treatments  GROUP   BY  tr_ptr   END    I want to get sum result in my label of form by clicking the button, please guide me how to complete this job

Amit Gupta · Answer

Sp has an input parameter, you can't get the output without passing them.
https://www.c-sharpcorner.com/UploadFile/rohatash/get-out-parameter-from-a-stored-procedure-in-Asp-Net/