在C#中读取自定义配置文件(Framework 4.0)

Question

我正在使用Framework 4.0在C#中开发一个应用程序.

在我的应用程序中,我想创建一个不是app.config文件的单独配置文件.配置文件包含我们为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文件中编写配置.

任何人都可以帮助如何做到这一点,而无需编写模仿框架中存在的代码的代码？

更新:

根据Kaido的回答,我写了一个实用程序类来读取自定义配置文件,并且能够在文件系统上的文件发生更改时刷新Config内容.

本课程的用法如下:

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. 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,以验证日志文件不为null并且文件是否存在.您可以更改代码以在代码中内联进行这些验证(尽管我建议使用PostSharp将应用程序分隔到各个方面).

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
        }
    }

Answer 1

 // 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);

来自http://msdn.microsoft.com/en-us/library/system.configuration.configurationmanager.aspx

Answer 2

在过去,我使用了Nini - http://nini.sourceforge.net/manual.php,它允许您在运行时读/写自定义配置文件(XML/Ini/Registry/.Config).

希望这可以帮助.