Net Framework Applictaion Configuration Note

在应用程序开发过程都要遇到编写XML的配置文件。一般在windows应用程序下面有个app.config XML文件，在Web Application 下面有个web.config已经机器的配置文件machine.config

1. 配置文件的基本内容，包括configuation root，然后是configuration sections

<configuration>
  <configSections>
    <section name="enterpriseLibrary.ConfigurationSource" type="Microsoft.Practices.EnterpriseLibrary.Common.Configuration.ConfigurationSourceSection, Microsoft.Practices.EnterpriseLibrary.Common, Version=2.0.0.0, Culture=neutral, PublicKeyToken=null" />
  </configSections>
  <enterpriseLibrary.ConfigurationSource selectedSource="File Configuration Source">
    <sources>
      <add name="File Configuration Source" type="Microsoft.Practices.EnterpriseLibrary.Common.Configuration.FileConfigurationSource, Microsoft.Practices.EnterpriseLibrary.Common, Version=2.0.0.0, Culture=neutral, PublicKeyToken=null"
        filePath="path\to\external.config" />
    </sources>
  </enterpriseLibrary.ConfigurationSource>
</configuration>

2. 在程序中编程获得configuration setting

using System.Configuration;


string config = ConfigurationManager.AppSettings["config data"];

3. 自定义配置文件处理方式,定义一个类实现IConfigurationSectionHandler 或者使用ConfigurationSection
具体的见MSDN
How to: Create Custom Configuration Sections Using IConfigurationSectionHandler
How to: Create Custom Configuration Sections Using ConfigurationSection