public void DoZoom(int aPercentage) { if (opened) { if (!_offline) { _Zoom = aPercentage; ctlViewer.Zoom(aPercentage); } else { switch (aPercentage) { case 1: _pdfCtl.FitWidth(); break; case 2: _pdfCtl.FitPage(); break; default: _pdfCtl.SetZoom(aPercentage); break; } } } }