public AdmBitacoraViewModel()
{
BLL.Bitacora bllBitacora = new BLL.Bitacora();
FechaDesde = DateTime.Now;
FechaHasta = DateTime.Now;
_coleccionCompleta = bllBitacora.ObtenerBitacoras();
ColeccionBitacora = new SortablePageableCollection <BE.Bitacora>(_coleccionCompleta);
//ListaTipoEventos = new ObservableCollection<string>(ObtenerTiposEventos());
GoToNextPageCommand = new RelayCommand(a => ColeccionBitacora.GoToNextPage());
GoToPreviousPageCommand = new RelayCommand(a => ColeccionBitacora.GoToPreviousPage());
}