c# 配置文件之configSections配置(三）

使用IConfigurationSectionHandler配置configSections

·步骤1：定义一个实体类

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace ConsoleApplication1
{
    /// <summary>
    /// 说明:
    /// 创建日期：2016/10/27 8:54:11
    /// 创建人：曹永承
    /// </summary>
    public class Conn
    {
        public string DataBase { get; set; }

        public string Server { get; set; }

        public string UserId { get; set; }

        public string Password { get; set; }

        public override string ToString()
        {
            return string.Format("server={0};database={1};user id={2};password={3}", Server, DataBase, UserId, Password);
        }
    }
}

步骤2：定义一个ConnSectionHandler类实现IConfigurationSectionHandler接口

using System.Configuration;
using System.Xml;

namespace ConsoleApplication1.config
{
    /// <summary>
    /// 说明:
    /// 创建日期：2016/10/27 8:52:35
    /// 创建人：曹永承
    /// </summary>
    public class ConnSectionHandler : IConfigurationSectionHandler
    {
        public object Create(object parent, object configContext, XmlNode section)
        {
            Conn conn = new Conn();

            if (section != null)
            {
                foreach (XmlNode node in section.ChildNodes)
                {
                    switch (node.Name)
                    {
                        case "server":
                            conn.Server = node.SelectSingleNode("@value").InnerText;
                            break;
                        case "database":
                            conn.DataBase = node.SelectSingleNode("@value").InnerText;
                            break;
                        case "userid":
                            conn.UserId = node.SelectSingleNode("@value").InnerText;
                            break;
                        case "password":
                            conn.Password = node.SelectSingleNode("@value").InnerText;
                            break;
                    }
                    
                }
            }

            return conn;
        }
    }
}

步骤3：配置xml

<configSections>
  <section name="conn" type="ConsoleApplication1.config.ConnSectionHandler,ConsoleApplication1"/>
</configSections>
<conn>
  <server value="(local)"/>
  <database value="testDB"/>
  <userid value="sa"/>
  <password value="123456"/>
</conn>

步骤4：测试代码

Conn conn = ConfigurationManager.GetSection("conn") as Conn ;
Console.WriteLine(conn); 
Console.ReadKey();

输出结果：