config.cs

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using System;
using System.Collections.Generic;
using System.Text;
using System.Configuration;

namespace APLib.Common.Configuration
{
	public abstract class Config<T> : IConfig where T : ConfigSection, new()
	{
		/// <summary>
		/// 程序文件名
		/// </summary>
		private string exePath;
		/// <summary>
		/// 配置段名称
		/// </summary>
		private string sectionName;
		/// <summary>
		/// 配置段对象
		/// </summary>
		protected T section;
		/// <summary>
		/// 配置文件对象
		/// </summary>
		protected System.Configuration.Configuration config;
		/// <summary>
		/// 配置段创建标志
		/// </summary>
		private bool created;
		/// <summary>
		/// 获取配置段创建标志
		/// true配置段已创建,false配置段未创建
		/// </summary>
		public bool Created { get { return created; } }
		/// <summary>
		/// 错误描述
		/// </summary>
		protected string lastError;
		/// <summary>
		/// 获取错误描述
		/// </summary>
		public string LastError { get { return lastError; } }

		/// <summary>
		/// 构造函数
		/// </summary>
		/// <param name="sectionName">配置段名称</param>
		public Config(string sectionName, string exePath)
		{
			this.sectionName = sectionName;
			this.exePath = exePath;
		}

		/// <summary>
		/// 打开配置文件并创建配置对象
		/// </summary>
		private void Create()
		{
			config = ConfigurationManager.OpenExeConfiguration(exePath);
			if (config.Sections[sectionName] == null)
			{
				section = new T();
				created = false;
			}
			else
			{
				section = config.GetSection(sectionName) as T;
				created = true;
			}
		}
		/// <summary>
		/// 关闭配置文件
		/// </summary>
		private void Close()
		{
			section = null;
			config = null;
		}

		public void Load()
		{
			try
			{
				Create();
				OnLoad();
				lastError = null;
			}
			catch(Exception e)
			{
				lastError = e.Message;
			}
			finally
			{
				Close();
			}
		}
		
		public void Save()
		{
			try
			{
				Create();
				OnSave();
				if (!created)
					config.Sections.Add(sectionName, section);
				config.Save();
				lastError = null;
			}
			catch (Exception e)
			{
				lastError = e.Message;
			}
			finally
			{
				Close();
			}
		}

		/// <summary>
		/// 加载自定义配置
		/// 用户必须重载此函数以加载自定义配置
		/// </summary>
		protected abstract void OnLoad();
		/// <summary>
		/// 保存自定义配置
		/// 用户必须重载此函数以保存自定义配置
		/// </summary>
		protected abstract void OnSave();
	}
}