public void LoadData(object sender, DoWorkEventArgs e)
{
doctorList = hmsfac.getDoctor();
nurseList = hmsfac.getNurse();
patientList = hmsfac.getPatient();
roomList = hmsfac.getRoom();
indpatList = hmsfac.getIndoorPatient();
prescList = hmsfac.getPrescriptions();
billpatlist = hmsfac.getBills();
this.Dispatcher.Invoke(new Action(delegate
{
dataGrid_Doctor.ItemsSource = doctorList;
dataGrid_Nurse.ItemsSource = nurseList;
dataGrid_Patient.ItemsSource = patientList;
dataGrid_Room.ItemsSource = roomList;
dataGrid_IndoorPatients.ItemsSource = indpatList;
dataGrid_Patients_Bill.ItemsSource = billpatlist;
specialization_update.ItemsSource = hmsfac.getCategories();
governedbytxt_update.ItemsSource = nurseList;
cboselroom_no.ItemsSource = roomList;
patname_bill.ItemsSource = patientList;
patname_bill.SelectedValuePath = "pat_id";
patname_bill.DisplayMemberPath = "pat_name";
patcombobox_updatedoc.ItemsSource = doctorList;
}));
}