用户可以在配置文件中添加自定义节,但添加的自定义节也必须由用户编写自定义类来读取,该自定义类必须实现IConfigurationSectionHandler 接口,一个简单的示例代码如下:
自定义类:
using System;using System.Xml;using System.Collections;using System.Configuration;using System.Collections.Specialized; namespace WebApp
{
/// <summary>
/// Summary description for MyConfiguration.
/// </summary> public class MyConfiguration : IConfigurationSectionHandler { public static string Name; public static string Password; public MyConfiguration() { } public Object Create(Object parent, object configContext, XmlNode section) { NameValueCollection settings; try { NameValueSectionHandler baseHandler = new NameValueSectionHandler(); settings = (NameValueCollection)baseHandler.Create(parent, configContext, section); } catch { settings = null; } if ( settings == null ) { } else { Name = settings["Name"]; Password = settings["Password"]; } return settings; } }
}
相应的配置文件:
<?xml version="1.0" encoding="utf-8" ?><configuration> <configSections> <section name="WebAppConfiguration" type="WebApp.MyConfiguration, WebApp" /> </configSections> <WebAppConfiguration> <add key="Name" value="root" /> <add key="Password" value="MyRoot" /> </WebAppConfiguration></configuration>
读取配置文件的示例代码:
private void Page_Load(object sender, System.EventArgs e) { System.Configuration.ConfigurationSettings.GetConfig("WebAppConfiguration"); Response.Write(MyConfiguration.Name + "," + MyConfiguration.Password); }
说明: 在System.Configuration.ConfigurationSettings.GetConfig("WebAppConfiguration");语句被执行时,MyConfiguration类的Creat方法将被Framework自动调用,MyConfiguration.Name和MyConfiguration.Password的值被修改.
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