VAGSuite.frmMain.UpdateOpenViewers C# (CSharp) Method

        private void UpdateOpenViewers(string filename)
        {
            try
            {
                // convert feedback map in memory to byte[] in stead of float[]
                foreach (DevExpress.XtraBars.Docking.DockPanel pnl in dockManager1.Panels)
                {
                    if (pnl.Text.StartsWith("Symbol: "))
                    {
                        foreach (Control c in pnl.Controls)
                        {
                            if (c is MapViewerEx)
                            {
                                MapViewerEx vwr = (MapViewerEx)c;
                                if (vwr.Filename == filename || filename == string.Empty)
                                {
                                    UpdateViewer(vwr);
                                }
                            }
                            else if (c is DevExpress.XtraBars.Docking.DockPanel)
                            {
                                DevExpress.XtraBars.Docking.DockPanel tpnl = (DevExpress.XtraBars.Docking.DockPanel)c;
                                foreach (Control c2 in tpnl.Controls)
                                {
                                    if (c2 is MapViewerEx)
                                    {
                                        MapViewerEx vwr2 = (MapViewerEx)c2;
                                        if (vwr2.Filename == filename || filename == string.Empty)
                                        {
                                            UpdateViewer(vwr2);
                                        }
                                    }
                                }
                            }
                            else if (c is DevExpress.XtraBars.Docking.ControlContainer)
                            {
                                DevExpress.XtraBars.Docking.ControlContainer cntr = (DevExpress.XtraBars.Docking.ControlContainer)c;
                                foreach (Control c3 in cntr.Controls)
                                {
                                    if (c3 is MapViewerEx)
                                    {
                                        MapViewerEx vwr3 = (MapViewerEx)c3;
                                        if (vwr3.Filename == filename || filename == string.Empty)
                                        {
                                            UpdateViewer(vwr3);
                                        }
                                    }
                                }
                            }
                        }

                    }
                }
            }
            catch (Exception E)
            {
                Console.WriteLine("Refresh viewer error: " + E.Message);
            }
        }