在Net2.0以上的版本对自定义configSection是件相对容易的事情.

比如,我们要创建以下自定义的配置节ConfigSectionsLib

<configuration>

<configSections>

<section name="ConfigSectionsLib" type="ConfigSectionsLib.IPSection,ConfigSectionsLib"/>

</configSections>

<ConfigSectionsLib configSource="ConfigFiles\IPAllow.config" />

......

<configuration>

IPAllow.config文件结构如下:

<?xml version="1.0" encoding="utf-8" ?>

<ConfigSectionsLib>

<IPItemElement>

<IPItem Name="1" IP="192.168.1.1"></IPItem>

<IPItem Name="2" IP="192.168.1.2"></IPItem>

<IPItem Name="3" IP="192.168.1.3"></IPItem>

<IPItem Name="4" IP="192.168.1.4"></IPItem>

</IPItemElement>

</ConfigSectionsLib>

我们该如何开始呢,

首先应该建个项目(名称空间为ConfigSectionsLib,  DLL文件名:ConfigSectionsLib.dll)

创建类:IPSection 让它继承ConfigurationSection

代码如下:

using System;

using System.Collections.Generic;

using System.Text;

using System.Configuration;

using System.ComponentModel;

namespace ConfigSectionsLib

{

public class IPSection : ConfigurationSection

{

/// <summary>

/// Gets the IPItemElement element.

/// </summary>

[ConfigurationProperty("IPItemElement")]

public IPItemElementCollection IPItems

{

get { return (IPItemElementCollection)this["IPItemElement"]; }

}

}

}

这代表我们要创建一个IPItems属性,这个属性是个IPItemElementCollection集合,它的定义在下面:

[ConfigurationCollection(typeof(IPItemElement), AddItemName = "IPItem", CollectionType = ConfigurationElementCollectionType.BasicMap)]

public class IPItemElementCollection : ConfigurationElementCollection

{

public IPItemElement this[int index]

{

get { return (IPItemElement)base.BaseGet(index); }

set

{

if (base.BaseGet(index) != null)

{

base.BaseRemoveAt(index);

}

base.BaseAdd(index, value);

}

}

public new IPItemElement this[string name]

{

get { return (IPItemElement)base.BaseGet(name); }

}

protected override ConfigurationElement CreateNewElement()

{

return new IPItemElement();

}

protected override object GetElementKey(ConfigurationElement element)

{

return (element as IPItemElement).Name;

}

public override ConfigurationElementCollectionType CollectionType

{

get { return ConfigurationElementCollectionType.BasicMap; }

}

protected override string ElementName

{

get { return "IPItem"; }

}

}

如果想创建跟appSettings和connectionStrings一样的配置节,就是由<add/>子节组成的配置节,

你可以这样定义IPItemElementCollection

[ConfigurationCollection(typeof(IPItemElement),  CollectionType = ConfigurationElementCollectionType.AddRemoveClearMap)]

public class IPItemElementCollection : ConfigurationElementCollection

{

public IPItemElement this[int index]

{

get { return (IPItemElement)base.BaseGet(index); }

set

{

if (base.BaseGet(index) != null)

{

base.BaseRemoveAt(index);

}

base.BaseAdd(index, value);

}

}

public new IPItemElement this[string name]

{

get { return (IPItemElement)base.BaseGet(name); }

}

protected override ConfigurationElement CreateNewElement()

{

return new IPItemElement();

}

protected override object GetElementKey(ConfigurationElement element)

{

return (element as IPItemElement).Name;

}

       // 将下面的注释

// public override ConfigurationElementCollectionType CollectionType

// {

//     get { return ConfigurationElementCollectionType.BasicMap; }

//  }

// protected override string ElementName

// {

//      get { return "IPItem"; }

//  }

}

这种形式的配置节将以以下的形式出现:

<ConfigSectionsLib>

<IPItemElement>

<Add Name="1" IP="192.168.1.1"></Add>

<Add Name="2" IP="192.168.1.2"></Add>

<Add Name="3" IP="192.168.1.3"></Add>

<Add Name="4" IP="192.168.1.4"></Add>

</IPItemElement>

</ConfigSectionsLib>

剩下的就是IPItemElement的定义:

public class IPItemElement : ConfigurationElement

{

[ConfigurationProperty("Name", DefaultValue = "")]

public string Name

{

get { return this["Name"] as string; }

}

[ConfigurationProperty("IP", DefaultValue = "")]

public string IP

{

get { return this["IP"] as string; }

}

}

这样就大功告成了,我们就可以写个类来封装对它的访问:

public class CustomIP

{

private string mName;

public string Name

{

get { return mName; }

set { mName = value; }

}

private string mIP;

public string IP

{

get { return mIP; }

set { mIP = value; }

}

}

public class SectionSetting

{

static IPSection ipSection = ConfigurationManager.GetSection("ConfigSectionsLib") as IPSection;

public static List<CustomIP> GetCustomIPList()

{

List<CustomIP> lst = new List<CustomIP>();

foreach (IPItemElement item in ipSection.IPItems)

{

CustomIP cip = new CustomIP();

cip.IP = item.IP;

cip.Name = item.Name;

lst.Add(cip);

}

//这边返回的就是所有子节的集合

return lst;

}

}