private void btn_selectApplication_unit_Click(object sender, RoutedEventArgs e)
        {
            string name      = this.nametext.Text;
            string group     = this.cbb_group.Text;
            int    membermin = 0;
            int    membermax = 0;

            if (this.members_10.IsChecked == true)
            {
                membermin = 1;
                membermax = 10;
            }
            if (this.members_20.IsChecked == true)
            {
                membermin = 11;
                membermax = 20;
            }
            if (this.members_30.IsChecked == true)
            {
                membermin = 21;
                membermax = 30;
            }
            if (this.members_40.IsChecked == true)
            {
                membermin = 31;
                membermax = 40;
            }
            if (this.members_40up.IsChecked == true)
            {
                membermin = 41;
                membermax = 0;
            }

            Application_unit_ViewModel                   application_Unit_ViewModel  = new Application_unit_ViewModel();
            List <Application_unit_ViewModel>            Application_unit_ViewModels = application_Unit_ViewModel.SelectApplication_unit(name, group, membermin, membermax);
            ObservableCollection <application_Unit_list> application_Unit_lists      = new ObservableCollection <application_Unit_list>();

            foreach (var row in Application_unit_ViewModels)
            {
                application_Unit_lists.Add(new application_Unit_list()
                {
                    運用單位     = row.Application_unit,
                    組別       = row.Group,
                    運用單位聯絡電話 = row.Application_phone_no,
                    負責人      = row.Principal,
                    負責人聯絡電話  = row.Principal_phone_no,
                    志工總人數    = row.Total_volunteers
                });
            }

            this.dg_Application_unit.ItemsSource = application_Unit_lists;
        }