public void LoginButtonHandler() { IsRunning = true; SqlEESettings.LoginPossible = false; try { CT.LoginButtonHandler(); } catch (Exception e) { SIEEMessageBox.Show(e.Message, "Login error", MessageBoxImage.Error); } finally { IsRunning = false; } DataLoaded = true; SqlEESettings.LoginPossible = true; SelectedTab = 1; }