读取配置文件中的自定义节

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.