public class ConfigureAppConfig
{//静态构造,不能实例化static ConfigureAppConfig() { }/**//// <summary>/// 获取AppSettings配置节中的Key值/// </summary>/// <param name="keyName">Key's name</param>/// <returns>Key's value</returns>public static string GetAppSettingsKeyValue(string keyName){return ConfigurationManager.AppSettings.Get(keyName);}/**//// <summary>/// 获取ConnectionStrings配置节中的值/// </summary>/// <returns></returns>public static string GetConnectionStringsElementValue(){ConnectionStringSettings settings = System.Configuration.ConfigurationManager.ConnectionStrings["connectionString"];return settings.ConnectionString;}/**//// <summary>/// 保存节点中ConnectionStrings的子节点配置项的值/// </summary>/// <param name="elementValue"></param>public static void ConnectionStringsSave(string ConnectionStringsName, string elementValue){System.Configuration.Configuration config = ConfigurationManager.OpenExeConfiguration(ConfigurationUserLevel.None);config.ConnectionStrings.ConnectionStrings["connectionString"].ConnectionString = elementValue;config.Save(ConfigurationSaveMode.Modified);ConfigurationManager.RefreshSection("connectionStrings");}/**//// <summary>/// 判断appSettings中是否有此项/// </summary>private static bool AppSettingsKeyExists(string strKey, Configuration config){foreach (string str in config.AppSettings.Settings.AllKeys){if (str == strKey){return true;}}return false;}/**//// <summary>/// 保存appSettings中某key的value值/// </summary>/// <param name="strKey">key's name</param>/// <param name="newValue">value</param>public static void AppSettingsSave(string strKey, string newValue){System.Configuration.Configuration config = ConfigurationManager.OpenExeConfiguration(ConfigurationUserLevel.None);if (AppSettingsKeyExists(strKey, config)){config.AppSettings.Settings[strKey].Value = newValue;config.Save(ConfigurationSaveMode.Modified);ConfigurationManager.RefreshSection("appSettings");}}
}