C#实现appSettings节点读取与修改的方法

public static string GetAppSettingsValue(string key)

ConfigurationManager.RefreshSection("appSettings");

return ConfigurationManager.AppSettings[key] ?? string.Empty;

public static bool UpdateAppSettings(string key, string value)

var _config = ConfigurationManager.OpenExeConfiguration(ConfigurationUserLevel.None);

if (!_config.HasFile)

throw new ArgumentException("程序配置文件缺失！");

KeyValueConfigurationElement _key = _config.AppSettings.Settings[key];

if (_key == null)

_config.AppSettings.Settings.Add(key, value);

else

_config.AppSettings.Settings[key].Value = value;

_config.Save(ConfigurationSaveMode.Modified);

return true;