【发布时间】：2011-09-14 13:48:48
【问题描述】：
我正在使用 C# 在 Framework 4.0 下开发应用程序。
在我的应用程序中，我想创建不是 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 中引用此文件。
我想在运行时加载它并读取它的内容。
我的意思的一个例子是 log4net，它允许您在 log4net.config 文件中写入配置。
任何人都可以在不编写模仿框架中存在的代码的代码的情况下帮助如何做到这一点吗？
更新：
根据Kaido的回答，我编写了实用程序类，它可以读取自定义配置文件，并且能够在文件系统上的文件更改时刷新配置内容。
该类中的用法如下：
-
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"]; -
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空且文件存在。您可以更改代码以使这些验证内联在代码中（尽管我建议使用 PostSharp 将应用程序分离到各个方面）。
代码如下：
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
}
}
【问题讨论】：
标签： c# configuration configuration-files