private void comboBox1_SelectedIndexChanged(object sender, EventArgs e) { switch (this.comboBox1.SelectedIndex) { case 0: ConfigManager.SaveCurrentDBType(DBType.sqlserver); this.txtConnString.Text = ConfigManager.GetDBConnectString(DBType.sqlserver); break; case 1: ConfigManager.SaveCurrentDBType(DBType.sqlite); this.txtConnString.Text = ConfigManager.GetDBConnectString(DBType.sqlite); break; } }