自定义配置节点(web.config)

1.web.config配置如下

<configuration>
  <configSections>
    <sectionGroup name="testGroup">
      <section name="root" type="CustomSectionInConfigDemo.RootConfiguration, CustomSectionInConfigDemo"/>
    </sectionGroup>
  </configSections>
  <testGroup>
    <root rootName="Test" closed="false">
      <siteAdmin adminId="1" adminName="admin A" />
      <siteUsers>
        <siteUser userId="1" userName="user A" />
        <siteUser userId="2" userName="user B" />
      </siteUsers>
    </root>
  </testGroup>

  <system.web>
    <compilation debug="true" targetFramework="4.0" />
  </system.web>
</configuration>

2.与上面web.config中自定义结点所对应的类定义如下：

/// <summary>
    /// 规则1：根结点(siteSetting结点)继承ConfigurationSection
    /// 规则2：代表单一子节点的siteAdmin类, siteUser类，继承自ConfigurationElement类 
    /// 规则3：包含多个同名子节点的siteUsers类，继承自ConfigurationElementCollection类 
    /// </summary>
    //对应root结点
    public class RootConfiguration : ConfigurationSection
    {
        //根结点本身的属性1
        [ConfigurationProperty("rootName")]
        public String RootName
        {
            get { return this["rootName"] as String; }
            set { this["rootName"] = value; }
        }
        //根结点本身的属性2
        [ConfigurationProperty("closed", IsRequired = true)]
        public Boolean Closed
        {
            get { return (Boolean)this["closed"]; }
            set { this["closed"] = value; }
        }
        //根结点中的子结点1
        [ConfigurationProperty("siteAdmin")]
        public SiteAdmin SiteAdmin
        {
            get { return this["siteAdmin"] as SiteAdmin; }
            set { this["siteAdmin"] = value; }
        }
        //根结点中的子结点2[该结点是一个容器，包含多个结点]
        [ConfigurationProperty("siteUsers")]
        public SiteUsers SiteUsers
        {
            get { return this["siteUsers"] as SiteUsers; }
            set { this["siteUsers"] = value; }
        }
    }
    //对应siteAdmin结点
    public class SiteAdmin : ConfigurationElement
    {
        [ConfigurationProperty("adminId", IsRequired = true)]
        public Int32 AdminId
        {
            get { return (Int32)this["adminId"]; }
            set { this["adminId"] = value; }
        }

        [ConfigurationProperty("adminName")]
        public String AdminName
        {
            get { return this["adminName"] as String; }
            set { this["adminName"] = value; }
        }
    }
    //对应siteUser同名结点
    public class SiteUser : ConfigurationElement
    {
        [ConfigurationProperty("userId", IsRequired = true)]
        public Int32 UserId
        {
            get { return (Int32)this["userId"]; }
            set { this["userId"] = value; }
        }

        [ConfigurationProperty("userName")]
        public String UserName
        {
            get { return this["userName"] as String; }
            set { this["userName"] = value; }
        }
    }

    //子结点2[容器结点]
    public class SiteUsers : ConfigurationElementCollection
    {
        //需重写以下四个方法
        protected override ConfigurationElement CreateNewElement()
        {
            //容器结点下的同名结点，所对应的元素名为"siteUser"
            return new SiteUser();
        }
        protected override String ElementName
        {
            get
            {
                return "siteUser";
            }
        }
        protected override object GetElementKey(ConfigurationElement element)
        {
            SiteUser siteUser = element as SiteUser;
            return siteUser.UserId;
        }
        public override ConfigurationElementCollectionType CollectionType
        {
            get
            {
                return ConfigurationElementCollectionType.BasicMap;
            }
        }        
    }

3.读取web.config中自定义结点代码如下:

            RootConfiguration siteSetting = (RootConfiguration)ConfigurationManager.GetSection("testGroup/root");

            Response.Write(siteSetting.RootName + "," + siteSetting.Closed.ToString());
            Response.Write("<br/>");

            Response.Write(siteSetting.SiteAdmin.AdminId.ToString() + "," + siteSetting.SiteAdmin.AdminName);
            Response.Write("<br/>");

            foreach (SiteUser u in siteSetting.SiteUsers)
            {
                Response.Write(u.UserId.ToString() + "," + u.UserName);
                Response.Write("<br/>");
            }