读取C#(Framework 4.0)中的自定义配置文件

我正在Framework 4.0下用C#开发一个应用程序。

在我的应用程序中，我想创建一个单独的配置文件，而不是app.config文件。配置文件包含我们为该产品开发的自定义配置部分。

我不想使用configSource从app.config引用此文件。

我想在运行时加载它并读取它的内容。

我的意思是log4net，它允许您在log4net.config文件中写入配置。

有人能帮助如何在不编写模仿框架中现有代码的代码的情况下做到这一点吗？

更新：

根据Kaido的回答，我编写了一个实用程序类，该类读取自定义配置文件，并能够在文件系统上的文件更改时刷新Config内容。

此类中的用法如下：

1. 获取配置文件内容

   // Create configuration reader that reads the files once
   var configFileReader = new CustomConfigurationFileReader("c:''myconfig.config");
   var config = configFileReader.Config;
   // Do any action you want with the config object like:
   config.GetSection("my.custom.section");
   // or,
   var someVal = config.AppSettings.Settings["someKey"];
   

2. 当配置文件更改时获取通知

   // Create configuration reader that notifies when the configuraiton file changes
   var configFileReader = new CustomConfigurationFileReader("c:''myconfig.config", true);
   // Register to the FileChanged event
   configFileReader.FileChanged += MyEventHandler;
   ...
   private void MyEventHanler(object sender, EventArgs e)
   {
        // You can safely access the Config property here, it is already contains the new content
   }
   

在代码中，我使用PostSharp来验证构造函数输入参数，以验证日志文件是否为null以及该文件是否存在。您可以更改代码，使这些验证在代码中内联（尽管我建议使用PostSharp将应用程序分离为方面）。

这是代码：

    using System;
    using System.Configuration;
    using System.IO;
    using CSG.Core.Validation;
    namespace CSG.Core.Configuration
    {
        /// <summary>
        /// Reads customer configuration file
        /// </summary>
        public class CustomConfigurationFileReader
        {
            // By default, don't notify on file change
            private const bool DEFAULT_NOTIFY_BEHAVIOUR = false;
            #region Fields
            // The configuration file name
            private readonly string _configFileName;
            /// <summary>
            /// Raises when the configuraiton file is modified
            /// </summary>
            public event System.EventHandler FileChanged;
            #endregion Fields
            #region Constructor
            /// <summary>
            /// Initialize a new instance of the CustomConfigurationFileReader class that notifies 
            /// when the configuration file changes.
            /// </summary>
            /// <param name="configFileName">The full path to the custom configuration file</param>
            public CustomConfigurationFileReader(string configFileName)
                : this(configFileName, DEFAULT_NOTIFY_BEHAVIOUR)
            {            
            }        
            /// <summary>
            /// Initialize a new instance of the CustomConfigurationFileReader class
            /// </summary>
            /// <param name="configFileName">The full path to the custom configuration file</param>
            /// <param name="notifyOnFileChange">Indicate if to raise the FileChange event when the configuraiton file changes</param>
            [ValidateParameters]
            public CustomConfigurationFileReader([NotNull, FileExists]string configFileName, bool notifyOnFileChange)
            {
                // Set the configuration file name
                _configFileName = configFileName;
                // Read the configuration File
                ReadConfiguration();
                // Start watch the configuration file (if notifyOnFileChanged is true)
                if(notifyOnFileChange)
                    WatchConfigFile();
            }
            #endregion Constructor        
            /// <summary>
            /// Get the configuration that represents the content of the configuration file
            /// </summary>
            public System.Configuration.Configuration Config
            {
                get;
                set;
            }
            #region Helper Methods
            /// <summary>
            /// Watch the configuraiton file for changes
            /// </summary>
            private void WatchConfigFile()
            {
                var watcher = new FileSystemWatcher(_configFileName);
                watcher.Changed += ConfigFileChangedEvent;
            }
            /// <summary>
            /// Read the configuration file
            /// </summary>
            public void ReadConfiguration()
            {
                // Create config file map to point to the configuration file
                var configFileMap = new ExeConfigurationFileMap
                {
                    ExeConfigFilename = _configFileName
                };
                // Create configuration object that contains the content of the custom configuration file
                Config = ConfigurationManager.OpenMappedExeConfiguration(configFileMap, ConfigurationUserLevel.None);
            }        
            /// <summary>
            /// Called when the configuration file changed.
            /// </summary>
            /// <param name="sender"></param>
            /// <param name="e"></param>
            private void ConfigFileChangedEvent(object sender, FileSystemEventArgs e)
            {
                // Check if the file changed event has listeners
                if (FileChanged != null)
                    // Raise the event
                    FileChanged(this, new EventArgs());
            }
            #endregion Helper Methods
        }
    }

 // Map the roaming configuration file. This
      // enables the application to access 
      // the configuration file using the
      // System.Configuration.Configuration class
      ExeConfigurationFileMap configFileMap =
        new ExeConfigurationFileMap();
      configFileMap.ExeConfigFilename = 
        roamingConfig.FilePath;
      // Get the mapped configuration file.
      Configuration config =
        ConfigurationManager.OpenMappedExeConfiguration(
          configFileMap, ConfigurationUserLevel.None);

namespace HelloWorld
{
    #region NameSpaces
    using System;
    using Cinchoo.Core.Configuration;
    #endregion NameSpaces
    [ChoConfigurationSection("sample")]
    public class SampleConfigSection : ChoConfigurableObject
    {
        #region Instance Data Members (Public)
        [ChoPropertyInfo("name", DefaultValue="Mark")]
        public string Name;
        [ChoPropertyInfo("message", DefaultValue="Hello World!")]
        public string Message;
        #endregion
    }
    static void Main(string[] args)
    {
        SampleConfigSection sampleConfigSection = new SampleConfigSection();
        Console.WriteLine(sampleConfigSection.ToString());
    }
}

<?xml version="1.0" encoding="utf-8"?>
<configuration>
  <configSections>
    <section name="sample" type="Cinchoo.Core.Configuration.ChoNameValueSectionHandler, Cinchoo.Core, Version=1.0.0.0, Culture=neutral, PublicKeyToken=b7dacd80ff3e33de" />
  </configSections>
  <sample>
    <add key="name" value="Mark" />
    <add key="message" value="Hello World!" />
  </sample>
</configuration>