public KategoriBarang GetById(int id)
        {
            KategoriBarang kategoribarang = null;

            using (var conn = new SqlConnection(constr))
            {
                conn.Open();
                String     query = "SELECT*FROM KategoriBarang where ID=@0";
                SqlCommand cmd   = new SqlCommand(query, conn);
                cmd.Parameters.AddWithValue("@0", id);
                SqlDataReader  reader = cmd.ExecuteReader();
                KategoriBarang kb     = null;
                while (reader.Read())
                {
                    kb = new KategoriBarang(reader);
                }
            }
            return(kategoribarang);
        }
        public List <KategoriBarang> getAll()
        {
            List <KategoriBarang> list = new List <KategoriBarang>();

            using (var conn = new SqlConnection(constr))
            {
                conn.Open();
                string         query  = "SELECT*FROM Kategori";
                SqlCommand     cmd    = new SqlCommand(query, conn);
                SqlDataReader  reader = cmd.ExecuteReader();
                KategoriBarang KB     = null;
                while (reader.Read())
                {
                    list.Add(KB);
                }
                conn.Close();
            }
            return(list);
        }