void FildCombobox(){
    String sql="SELECT INDEX_REGION,CODE_REGION FROM REGIONS ORDER BY INDEX_REGION ";
    try{
    PreparedStatement pst;
 
 
     DefaultComboBoxModel<String> model= new DefaultComboBoxModel<>();
 
     model.addElement("");
 
 
     pst=Myconnection.prepareStatement(sql);
 
     ResultSet rs=pst.executeQuery();
 
 
      while(rs.next()){
 
          int TextCodeRegion=rs.getInt("CODE_REGION");
          model.addElement("CODE_REGION");
 
 
 
      }
       TextCode_Region.setModel(model);
    }catch(SQLException e){
        JOptionPane.showMessageDialog(null, "Erreur"+e);