创建自定义配置节

创建一个继承 System.Configuration.ConfigurationSection 类的公共类，如下面的代码示例所示。

using System;
using System.Collections;
using System.Text;
using System.Configuration;
using System.Xml;

namespace MyConfigSectionHandler
{
    public class MyHandler : ConfigurationSection
    {
        public MyHandler()
        {
        }

        public MyHandler(String attribVal)
        {
            MyAttrib1 = attribVal;
        }

        [ConfigurationProperty("myAttrib1", DefaultValue = "Clowns", IsRequired = true)]
        [StringValidator(InvalidCharacters = "~!@#$%^&*()[]{}/;'\"|\\", MinLength = 1, MaxLength = 60)]
        public String MyAttrib1
        {
            get
            { return (String)this["myAttrib1"]; }
            set
            { this["myAttrib1"] = value; }
        }

        [ConfigurationProperty("myChildSection")]
        public MyChildConfigElement MyChildSection
        {
            get
            { return (MyChildConfigElement)this["myChildSection"]; }
            set
            { this["myChildSection"] = value; }
        }
    }

 

//ConfigurationElement 类

//注意：此类在 .NET Framework 2.0 版中是新增的。
//表示配置文件中的配置元素。

    public class MyChildConfigElement : ConfigurationElement
    {
        public MyChildConfigElement()
        {
        }

        public MyChildConfigElement(String a1, String a2)
        {
            MyChildAttribute1 = a1;
            MyChildAttribute2 = a2;
        }

        [ConfigurationProperty("myChildAttrib1", DefaultValue = "Zippy", IsRequired = true)]
        [StringValidator(InvalidCharacters = "~!@#$%^&*()[]{}/;'\"|\\", MinLength = 1, MaxLength = 60)]
        public String MyChildAttribute1
        {
            get
            { return (String)this["myChildAttrib1"]; }
            set
            { this["myChildAttrib1"] = value; }
        }

        [ConfigurationProperty("myChildAttrib2", DefaultValue = "Michael Zawondy", IsRequired = true)]
        [StringValidator(InvalidCharacters = "~!@#$%^&*()[]{}/;'\"|\\", MinLength = 1, MaxLength = 60)]
        public String MyChildAttribute2
        {
            get
            { return (String)this["myChildAttrib2"]; }
            set
            { this["myChildAttrib2"] = value; }
        }
    }
}

ASP.NET 配置文件添加自定义节处理程序

将 sectionGroup 元素和 section 元素添加到 Web.config 文件的 configSections 元素中，如下面的代码示例所示

 

<configuration>
<!-- Configuration section-handler declaration area. -->
<configSections>
<sectionGroup name="myCustomGroup">
<section
name="myCustomSection"
type="MyConfigSectionHandler.MyHandler, MyCustomConfigurationHandler, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null"
allowLocation="true"
allowDefinition="Everywhere"
/>
</sectionGroup>
<!-- Other <section> and <sectionGroup> elements. -->
</configSections>
<!-- Configuration section settings area. -->
</configuration>

在 Web.config 文件的配置节设置区域中添加自定义配置元素。

 

<configuration>
<!-- Configuration section-handler declaration area. -->
<!-- Configuration section settings area. -->
<myCustomGroup>
<myCustomSection myAttrib1="Clowns">
<myChildSection
myChildAttrib1="Zippy"
myChildAttrib2="Michael Zawondy "/>
</myCustomSection>
</myCustomGroup>
<!-- Other configuration settings, like <system.web> -->
</configuration>

以编程方式访问自定义配置数据

 

<%@ Page Language="C#" %>

<script runat="server">
    protected void Button1_Click(object sender, EventArgs e)
    {
        MyConfigSectionHandler.MyHandler config =
            (MyConfigSectionHandler.MyHandler)System.Configuration.ConfigurationManager.GetSection(
            "myCustomGroup/myCustomSection");
       
        StringBuilder sb = new StringBuilder();

        sb.Append("<h2>Attributes in the myCustomSection Element:</h2>");
        sb.AppendFormat("myAttrib1 = {0}<br/>", config.MyAttrib1.ToString());
        sb.Append("<h2>Attributes in the myChildSection Element:</h2>");
        sb.AppendFormat("myChildAttrib1 = {0}<br/>", config.MyChildSection.MyChildAttribute1.ToString());
        sb.AppendFormat("myChildAttrib2 = {0}<br/>", config.MyChildSection.MyChildAttribute2.ToString());

        Label1.Text = sb.ToString();
        Label1.Visible = true;
    }
</script>

<html  >
<head runat="server">
    <title>Untitled Page</title>
</head>
<body>
    <form id="form1" runat="server">
    <div>
   
    <h1>Enumerate MyCustomSection</h1>
    <asp:Label ID="Label1" runat="server"
        Text="" />
    <br />
    <asp:Button ID="Button1" runat="server"
        Text="Get Custom Config Info"
        OnClick="Button1_Click" />

    </div>
    </form>
</body>
</html>