【XML】配置文件—webconfig

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(); 

 <appSettings>

       <add key="pagetitle" value="Job Site Starter Kit (Ver.1.0)"></add>

        <add key="sitelogo" value="logo.gif"></add>

        <add key="advertiseemail" value="sales@somesite.com"></add>

     </appSettings>

//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("<BR>");
}

 //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();
}