public Klijent() { }

        public Klijent(DataRow red)
        {
            this.KlijentID = (int)red[0];
            this.Ime = (string)red[1];
            this.Prezime = (string)red[2];
            this.Adresa = (string)red[3];
            this.GradID = (int)red[4];
            this.Telefon = (string)red[5];
            this.Email = (string)red[6];
            this.Aktivan = Convert.ToBoolean(red[7]);
        }