private void btn_ok_Click(object sender, RoutedEventArgs e)
        {
            //ini buttonselect
            Button      button = sender as Button;
            Model_Sales item   = button.DataContext as Model_Sales;

            Console.WriteLine("KLIK VIEW: " + item.KodeSales + " - " + item.NamaSales);

            if (OnSalesPilihChanged != null)
            {
                OnSalesPilihChanged.Invoke(this, new SalesPilihArgs(item.KodeSales, item.NamaSales));
            }


            Close();
        }
        private void TampilDaftarSearch(string input)
        {
            Model_Login m    = new Model_Login();
            bool        stat = false;

            bool ada = false;

            list_daftar_sales.Clear();

            grid_progress.Visibility = Visibility.Visible;

            BackgroundWorker worker = new BackgroundWorker();

            worker.WorkerReportsProgress = true;
            worker.ProgressChanged      += delegate
            {
            };
            worker.DoWork += delegate
            {
                try
                {
                    using (SqlConnection connection = new SqlConnection(Setting_variabel.mykoneksi_sql))
                    {
                        connection.Open();

                        String sqlQuery = "select Kode,Nama from SalesPerson where username like '%" + input + "%' or nama like '%" + input + "%' or Kode like '%" + input + "%' and Aktif=1";
                        using (SqlCommand command = new SqlCommand(sqlQuery, connection))
                        {
                            SqlDataReader reader = command.ExecuteReader();

                            while (reader.Read())
                            {
                                Model_Sales item = new Model_Sales();
                                item.KodeSales = reader.GetString(0);
                                item.NamaSales = reader.GetString(1);


                                App.Current.Dispatcher.Invoke((Action) delegate // <--- HERE
                                {
                                    list_daftar_sales.Add(item);
                                });


                                ada = true;
                            }

                            stat = true;
                            reader.Close();
                        }

                        m.Keterangan = "Unable to process your request";

                        connection.Close();
                    }
                }
                catch (Exception e)
                {
                    m.Keterangan = "Unable to process your request: " + e.Message;
                    Console.WriteLine("" + e.Message + " " + e.StackTrace);
                }
            };
            //worker.ProgressChanged += worker_ProgressChanged;
            worker.RunWorkerCompleted += delegate
            {
                grid_progress.Visibility = Visibility.Collapsed;

                m.IsSukses = stat;

                if (m.IsSukses == true)
                {
                    if (ada == false)
                    {
                        MessageBox.Show("Could not found \"" + input + "\"",
                                        "Information", MessageBoxButton.OK, MessageBoxImage.Information);
                    }
                }
                else
                {
                    MessageBox.Show("" + m.Keterangan, "Warning", MessageBoxButton.OK, MessageBoxImage.Warning);
                }
            };
            worker.RunWorkerAsync();
        }