EntityFrameWork Core - Stored Procedure

Question

Every time I execute this code from Swagger I get the same error! Must declare the scalar variable "@typecard"

            var TypeCardp = new SqlParameter("@typecard", System.Data.SqlDbType.Int).Value = agent.TypeCard;  
            var AgentNamep = new SqlParameter("@Agentname", System.Data.SqlDbType.NVarChar).Value =   
            agent.AgentName;  
            var Birthday = new SqlParameter("@Birthday", System.Data.SqlDbType.DateTime2).Value = agent.Birthdate;  
            var Gender1 = new SqlParameter("@Gender1", System.Data.SqlDbType.Bit).Value = agent.Gender1;  
            var Gender2 = new SqlParameter("@Gender2", System.Data.SqlDbType.Bit).Value = agent.Gender2;  
            var SubscriptionTitle = new SqlParameter("@SubscriptionTitle",                                   
            System.Data.SqlDbType.UniqueIdentifier).Value = agent.SubscriberTitle;  
            var Phone = new SqlParameter("@Phone", System.Data.SqlDbType.NVarChar).Value = agent.Phone;  
            var Password = new SqlParameter("@Password", System.Data.SqlDbType.NVarChar).Value =   
            agent.LoginPassword;  
            var CityGuide = new SqlParameter("@CityGuide", System.Data.SqlDbType.UniqueIdentifier).Value =   
            agent.CityGuide;  
            var DistrictGuide = new SqlParameter("@DistrictGuide", System.Data.SqlDbType.UniqueIdentifier).Value =   
            agent.DistrictGuide;  
            var InstituteGuide = new SqlParameter("@InstituteGuide", System.Data.SqlDbType.UniqueIdentifier).Value =   
            agent.InstituteGuide;  
            var NearestPoint = new SqlParameter("@NearestPoint", System.Data.SqlDbType.NVarChar).Value =   
            agent.NearestPoint;  
            var FatherName = new SqlParameter("@FatherName", System.Data.SqlDbType.NVarChar).Value =   
            agent.FatherName;  
            var FLatitude = new SqlParameter("@FLatitude", System.Data.SqlDbType.Float).Value = agent.FixedLatitude;  
            var FLongitude = new SqlParameter("@FLongitude", System.Data.SqlDbType.Float).Value =   
            agent.FixedLongitude;  
            var Subscriptioner = new SqlParameter("@Subscriptioner", System.Data.SqlDbType.UniqueIdentifier).Value   
             = agent.Subscriptioner;  
            var NotificationChannel = new SqlParameter("@NotificationChannel",   
            System.Data.SqlDbType.NVarChar).Value = agent.NotificationChannel;  
            var CarName = new SqlParameter("@CarName", System.Data.SqlDbType.NVarChar).Value = agent.CarName;  
            var NumberOfSeats = new SqlParameter("@NumberOfSeats", System.Data.SqlDbType.Int).Value =   
            agent.NumberOfSeats;  
            var Color = new SqlParameter("@Color", System.Data.SqlDbType.UniqueIdentifier).Value = agent.Color;  
            var SubBrand = new SqlParameter("@SubBrand", System.Data.SqlDbType.UniqueIdentifier).Value =   
            agent.SubBrand;  
            var FuelType0 = new SqlParameter("@FuelType0", System.Data.SqlDbType.Bit).Value = agent.FuelType0;  
            var FuelType1 = new SqlParameter("@FuelType1", System.Data.SqlDbType.Bit).Value = agent.FuelType1;  
            var DocumentNumber = new SqlParameter("@DocumentNumber", System.Data.SqlDbType.NVarChar).Value   
            = agent.DocumentNumber;  
            var BrandGuide = new SqlParameter("@BrandGuide", System.Data.SqlDbType.UniqueIdentifier).Value =   
            agent.BrandGuide;  
  
            context.Database.ExecuteSqlRaw("exec Prc_InsertAgent @typecard, @Agentname, @Birthday, @Gender1,   
                @Gender2, @SubscriptionTitle, @Phone, @Password, @CityGuide, @DistrictGuide, @InstituteGuide,   
                @NearestPoint, @FatherName, @FLatitude, @FLongitude, @Subscriptioner, @NotificationChannel,   
                @CarName, @NumberOfSeats, @Color, @SubBrand, @FuelType0, @FuelType1, @DocumentNumber,   
                @BrandGuide", TypeCardp, AgentNamep, Birthday, Gender1, Gender2, SubscriptionTitle, Phone,   
                Password, CityGuide, DistrictGuide, InstituteGuide, NearestPoint, FatherName, FLatitude, FLongitude,   
               Subscriptioner, NotificationChannel, CarName, NumberOfSeats, Color, SubBrand, FuelType0, FuelType1,   
               DocumentNumber, BrandGuide);  

I'm using the same approach to execute a SP with less fields than this one

            public void AddCity(City CityName)  
            {  
                //throw new NotImplementedException();  
                var param = new SqlParameter("@cardname", CityName.Name);  
                var param1 = new SqlParameter("@latitude", CityName.Latitude);  
                var param2 = new SqlParameter("@longitude", CityName.Longitude);  
                context.Database.ExecuteSqlRaw("exec AddCity @cardname, @latitude,   
               @longitude", param, param1, param2);  
            }  

and it's working perfectly

Answer 1

Make sure agent.TypeCard is not null. Set a breakpoint and use the watch window or immediate window to check the agent property value(s).