1,利用ConfigurationManager和WebConfigurationManager操作配置文件。

//打开配置文件    Configuration config = WebConfigurationManager.OpenWebConfiguration("~");    //获取appSettings节点    AppSettingsSection appSection = (AppSettingsSection)config.GetSection("appSettings");    //在appSettings节点中添加元素    appSection.Settings.Add("addkey1", "key1's value");     //删除appSettings节点中的元素    appSection.Settings.Remove("addkey1");    //修改appSettings节点中的元素    appSection.Settings["addkey2"].Value = "Modify key2's value";    config.Save();

            
              
              
           
     //获取到appSettings节点下所有的add节点的值，已键值对的方式获得Configuration config = WebConfigurationManager.OpenWebConfiguration(Request.ApplicationPath);AppSettingsSection appSettings = (AppSettingsSection) config.GetSection("appSettings");string[] appKeys = appSettings.Settings.AllKeys;for (int i = 0; i < appSettings.Settings.Count; i++){//这里只进行简单的输出Response.Write(appSettings.Settings[appKeys[i]].Value);Response.Write("
");} //获得某一个key的值Configuration config = WebConfigurationManager.OpenWebConfiguration(Request.ApplicationPath);AppSettingsSection appSettings = (AppSettingsSection)config.GetSection("appSettings");string pateTitle= appSettings.Settings["pagetitle"].Value; //获取key为patetitle的value值string siteLogo＝ appSettings.Settings["siteLogo"].Value; //获取key为sitelogo的value值

 在ASP.NET2.0里提供了两种方式对数据库连接字符串加密，一种是使用asp_regii命令，一种是通过代码，下面显示的是通过代码方式对数据库连接字符串加密，代码如下：

Configuration config = WebConfigurationManager.OpenWebConfiguration(Request.ApplicationPath);ConfigurationSection configSection = config.GetSection("connectionStrings");if (configSection.SectionInformation.IsProtected){
    //如果已经加密，就不用再加密了configSection.SectionInformation.UnprotectSection();config.Save();}else{configSection.SectionInformation.ProtectSection ("DataProtectionConfigurationProvider");config.Save();}