public void PopulateTabel()
        {
            List <CijferTabel> lstCijfers = new List <CijferTabel>();
            string             sScore     = "";

            DataTable dtCijfers = db.CijferlijstOphalen(user);

            foreach (DataRow row in dtCijfers.Rows)
            {
                switch (row[0].ToString())        //Switch voor de verschillende vakken & de ID's
                {
                case "10":
                    sScore = "20 van de 20";
                    break;

                case "9.6":
                    sScore = "19 van de 20";
                    break;

                case "9.2":
                    sScore = "18 van de 20";
                    break;

                case "8.8":
                    sScore = "17 van de 20";
                    break;

                case "8.4":
                    sScore = "16 van de 20";
                    break;

                case "8":
                    sScore = "15 van de 20";
                    break;

                case "7.5":
                    sScore = "14 van de 20";
                    break;

                case "7.1":
                    sScore = "13 van de 20";
                    break;

                case "6.8":
                    sScore = "12 van de 20";
                    break;

                case "6.3":
                    sScore = "11 van de 20";
                    break;

                case "5.9":
                    sScore = "10 van de 20";
                    break;

                case "5.5":
                    sScore = " 9 van de 20";
                    break;

                case "5":
                    sScore = " 8 van de 20";
                    break;

                case "4.5":
                    sScore = " 7 van de 20";
                    break;

                case "4":
                    sScore = " 6 van de 20";
                    break;

                case "3.5":
                    sScore = " 5 van de 20";
                    break;

                case "3":
                    sScore = " 4 van de 20";
                    break;

                case "2.5":
                    sScore = " 3 van de 20";
                    break;

                case "2":
                    sScore = " 2 van de 20";
                    break;

                case "1.5":
                    sScore = " 1 van de 20";
                    break;

                case "1":
                    sScore = " 0 van de 20";
                    break;

                default:
                    sScore = "Kan niet worden opgehaald";
                    break;
                }

                lstCijfers.Add(new CijferTabel()
                {
                    Vak = row[2].ToString(), Lesonderwerp = row[1].ToString(), Cijfer = row[0].ToString(), Score = sScore
                });
            }

            dgCijfers.ItemsSource = lstCijfers;
        }