public MainWindow()
{
InitializeComponent();
SpecialeControls();
EnableDisableButtons(false);
ValidatieDeelnemer(grdTop);
beheerControls.AlleTextBoxenNormaal();
}
void MaakVeldenDeelnemersLeeg()
{
lstMailingList.SelectedIndex = -1;
lblId.Content = "";
txtFirstName.Clear();
txtLastName.Clear();
txtEmail.Clear();
txtPhone.Clear();
txtStreet.Clear();
txtStreetNumber.Clear();
txtCity.Clear();
txtPostalCode.Clear();
VulList();
deelnemer_Sel = null;
beheerControls.AlleTextBoxenNormaal();
EnableDisableButtons(false);
}
