private void BtnUpdateCustomer_Click(object sender, RoutedEventArgs e)
{
if (!Validation())
{
return;
}
Customer customer = new Customer
{
Id = cr.Id,
FullName = tbCustomerFullName.Text,
CreateDate = DateTime.Today,
PhoneNumber = tbPhoneNumber.Text,
Address = tbAddress.Text
};
dr.UpdateCustomer(customer);
btnAddCustomer.Visibility = Visibility.Visible;
btnUpdateCustomer.Visibility = Visibility.Hidden;
btnDeleteCustomer.Visibility = Visibility.Hidden;
FillDG();
ResetTextBox();
}