private void Delete_Click(object sender, RoutedEventArgs e)
 {
     if (this.KlasifikasiKontakSelected == null)
     {
         MessageBox.Show("Contact classification has not been selected !");
     }
     else
     {
         KlasifikasiKontakBLL KlasifikasiKontakBLL = new KlasifikasiKontakBLL();
         if (KlasifikasiKontakBLL.RemoveKlasifikasiKontak(this.KlasifikasiKontakSelected.Id) == true)
         {
             MessageBox.Show("Contact Classification successfully deleted");
             this.LoadKlasifikasiKontak();
             this.KlasifikasiKontakSelected = null;
         }
     }
 }
        private void BtnSave_Click(object sender, RoutedEventArgs e)
        {
            if (CbContactType.Text == "" || txtKlasifikasiKontak.Text == "" || txtNote.Text == "")
            {
                MessageBox.Show("please fill in the blank fields", ("Form Validation"), MessageBoxButton.OK, MessageBoxImage.Error);
                return;
            }
            KlasifikasiKontakBLL KlasifikasiKontakBLL = new KlasifikasiKontakBLL();

            if (this.ContactClasificationForm.isEdit == false)
            {
                if (KlasifikasiKontakBLL.AddKlasifikasiKontak(this.GetData()) > 0)
                {
                    this.ClearForm();
                    MessageBox.Show("Contact Classification successfully added !");
                    this.ContactClasificationForm.LoadKlasifikasiKontak();
                }
                else
                {
                    MessageBox.Show("Contact Classification failed to be added !");
                }
            }
            else
            {
                if (KlasifikasiKontakBLL.EditKlasifikasiKontak(this.GetData()) == true)
                {
                    this.ClearForm();
                    MessageBox.Show("Contact Classification successfully changed !");
                    this.ContactClasificationForm.LoadKlasifikasiKontak();
                }
                else
                {
                    MessageBox.Show("Contact Classification failed to change !");
                }
            }
            this.Close();
        }