1.修改appSettings
Configuration config = ConfigurationManager.OpenExeConfiguration(ConfigurationUserLevel.None); config.AppSettings.Settings.Remove(newKey); config.AppSettings.Settings.Add(newKey, newValue); config.Save(ConfigurationSaveMode.Full); ConfigurationManager.RefreshSection("appSettings");
2.修改connectionStrings
ConnectionStringSettings dbSetting = new ConnectionStringSettings(newName, connString); Configuration config = ConfigurationManager.OpenExeConfiguration(ConfigurationUserLevel.None); config.ConnectionStrings.ConnectionStrings.Remove(newName); config.ConnectionStrings.ConnectionStrings.Add(dbSetting); config.Save(ConfigurationSaveMode.Modified); ConfigurationManager.RefreshSection("connectionStrings");