private void dictSelector_SelectedIndexChanged(object sender, EventArgs e) { if (dictSelector.SelectedItem == ciEnglish_Chinese) { if (!File.Exists(Gib.hostpath + "\\ConciseOxfordEnglishChineseDictionary.db")) { dictSelector.SelectedItem = ciNone; FrmDownload_Dict frm = new FrmDownload_Dict(); frm.ShowDialog(this); } else { dictConnection = new SQLiteConnection("Data Source =" + Gib.hostpath + "\\ConciseOxfordEnglishChineseDictionary.db"); dictConnection.Open(); } } }