public ListStaffpage()
{
InitializeComponent();
ProgressBar_.IsEnabled = true;
ProgressBar_.Visibility = Visibility.Visible;
Thread thread = new Thread(delegate()
{
ObservableCollection <Staff> staffs = new ObservableCollection <Staff>();
staffs = manage.LoadData_Staff();
Dispatcher.Invoke(() =>
{
liststaff.ItemsSource = staffs;
ProgressBar_.IsEnabled = false;
ProgressBar_.Visibility = Visibility.Hidden;
});
});
thread.Start();
}