private void BtnSearchPatient_Click(object sender, RoutedEventArgs e) { PatientList selectPatient = new PatientList(); if (selectPatient.ShowDialog() == true) { this.SystemCase = new Case(selectPatient.SelectedPatient) { Status = "Wartet", Location = "Wartezimmer" }; this.DataContext = this.SystemCase; this.btnEditData.IsEnabled = true; this.btnAddNewParameters.IsEnabled = true; } }