private void frmPrincipal_Load(object sender, EventArgs e)
        {
            cmbUsuarios.DataSource    = null;
            cmbUsuarios.ValueMember   = "idUser";
            cmbUsuarios.DisplayMember = "username";
            cmbUsuarios.DataSource    = AppUserDAO.GetLista();

            cmbNegociosProd.DataSource    = null;
            cmbNegociosProd.ValueMember   = "idBusiness";
            cmbNegociosProd.DisplayMember = "name";
            cmbNegociosProd.DataSource    = BusinessDAO.GetLista();

            cmbNegocios.DataSource    = null;
            cmbNegocios.ValueMember   = "idBusiness";
            cmbNegocios.DisplayMember = "name";
            cmbNegocios.DataSource    = BusinessDAO.GetLista();

            cmbProds.DataSource    = null;
            cmbProds.ValueMember   = "idProduct";
            cmbProds.DisplayMember = "name";
            cmbProds.DataSource    = ProducDAO.GetProdsNeg();

            dgUsuarios.DataSource = null;
            dgUsuarios.DataSource = AppUserDAO.GetLista();

            dgNegocios.DataSource = null;
            dgNegocios.DataSource = BusinessDAO.GetLista();
        }
 void actualizarDatos()
 {
     cmbUsuarios.DataSource     = AppUserDAO.GetLista();
     dgUsuarios.DataSource      = AppUserDAO.GetLista();
     cmbNegociosProd.DataSource = BusinessDAO.GetLista();
     dgNegocios.DataSource      = BusinessDAO.GetLista();
     cmbNegocios.DataSource     = BusinessDAO.GetLista();
     dgOrdenes.DataSource       = AppOrderDAO.GetLista();
     cmbProds.DataSource        = ProducDAO.GetProdsNeg();
 }