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.