自定义节的配置文件 myCustom.config 如下：

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

<configuration>

<configSections>

<section name="myCustomSection" type="CustomConfig.MyCustomSection, CustomConfig"/>

</configSections>

<myCustomSection myFirstSetting="1" mySecondSetting="A" />

</configuration>

其中 section 节的书写格式：

<section name="section name"

type="configuration section handler class, assembly file name, version, culture, public key token"

allowDefinition= "Everywhere|MachineOnly|MachineToApplication|MachineToWebRoot"

allowLocation="True|False"

restartOnExternalChanges="True|False" />

关于configSections 的 section 元素（常规设置架构）请参考

http://msdn.microsoft.com/zh-cn/library/ms228245(VS.80).aspx 中有较详细的解释。

那么，我们如何来通过程序读取自定义的配置参数及值呢？其实很简单我们只需要从ConfigurationSection 派生出自己的类即可。程序如下：

using System.Configuration;

namespace CustomConfig

{

public sealed class MyCustomSection : ConfigurationSection

{

public MyCustomSection(){

}

[ConfigurationProperty("myFirstSetting")]

public long MyFirstSetting

{

get

{

return (long)this["myFirstSetting"];

}

set

{

this["myFirstSetting"] = value;

}

}

[ConfigurationProperty("mySecondSetting")]

public string MySecondSetting

{

get{

return (string)this["mySecondSetting"];

}

set{

this["mySecondSetting"] = value;

}

}

}

}

仅需要在表示配置节的属性的前边加上ConfigurationProperty 属性标记即可。

测试程序如下：

static void Main(string[] args)

{

ExeConfigurationFileMap fileMap = new ExeConfigurationFileMap();

fileMap.ExeConfigFilename = @"myCustom.config";

Configuration config = ConfigurationManager.OpenMappedExeConfiguration(

fileMap, ConfigurationUserLevel.None);

MyCustomSection section = config.Sections["myCustomSection"] as MyCustomSection;

if (section != null)

{

Console.WriteLine("My first Setting: {0}", section.MyFirstSetting);

Console.WriteLine("My second setting: {0}", section.MySecondSetting);

}

Console.ReadKey();

}

程序输出：

My first Setting: 1

My second setting: A

在属性标记中还可以设置默认值、最小值、最大值等等。如：

[ConfigurationProperty("myFirstSetting", DefaultValue = (long)1, IsRequired = true)]

[LongValidator(MinValue = 1, MaxValue = 10000, ExcludeRange = false)]

设置 myFirstSetting　的默认值是1 且是必须的。LongValidator　设置配置文件中值的范围只能是在[1-10000]之间。

[ConfigurationProperty("mySecondSetting", DefaultValue="A",IsRequired=true)]

[StringValidator(InvalidCharacters="~!@#$%^&*(){}/;'|\\",MinLength=1,MaxLength=60)]

StringValidator中设置有无效的字符及字符串的长度。

代码文件:

Xing 学习笔记 2008-6-24整理