artlogic.cs

来自「基于Asp.net、MS sql sever 2000、C# 论坛系统源码」· CS 代码 · 共 123 行

using System;
using Stella.Model;
using Stella.Utility;
using Stella.SQLServerDAL;

namespace Stella.BusinessLogic
{
	/// <summary>
	/// 处理帖子变化事件的委托
	/// </summary>
	/// <remarks>
	/// 该委托主要用来负责监视帖子的变化
	/// </remarks>
	public delegate void  TopicChangedEventHandler(Art art);

	/// <summary>
	/// 帖子操作
	/// </summary>
	public class ArtLogic
	{
		/// <summary>
		/// 构造函数
		/// </summary>
		/// <param name="handler">订阅事件方提供得委托</param>
		/// <remarks>
		/// 接受的委托方法提供使缓存失效的功能
		/// </remarks>
		public ArtLogic(TopicChangedEventHandler handler)
		{
			TopicChanged+=handler;
		}

		/// <summary>
		/// 构造函数
		/// </summary>
		public ArtLogic()
		{}

		/// <summary>
		/// 帖子改变事件
		/// </summary>
		/// <remarks>
		/// 若此事件发布，则说明数据库已经改变，需要重新缓存数据
		/// </remarks>
		public event TopicChangedEventHandler TopicChanged;


		/// <summary>
		/// 更新帖子的资料
		/// </summary>
		/// <param name="art">要更新的帖子</param>
		public void Update(Art art)
		{
			ArtAccess aa=new ArtAccess();
			aa.Update(art);
		}

		/// <summary>
		/// 添加帖子
		/// </summary>
		/// <param name="art">要添加的帖子</param>
		public void Create(TopArt art)
		{
			DebugHelper.CheckCondition(TopicChanged!=null,"没有任何类订阅监视数据库改变的TopicChanged事件！");
			ArtAccess aa=new ArtAccess();
			aa.Create(art);

			TopicChanged(art);
		}

		/// <summary>
		/// 添加帖子
		/// </summary>
		/// <param name="art">要添加的帖子</param>
		public void Create(CommonArt art)
		{
			DebugHelper.CheckCondition(TopicChanged!=null,"没有任何类订阅监视数据库改变的TopicChanged事件！");
			ArtAccess aa=new ArtAccess();
			aa.Create(art);

			TopicChanged(art);
		}

		/// <summary>
		/// 删除帖子
		/// </summary>
		/// <param name="art">要删除的帖子</param>
		public void Remove(Art art)
		{
			DebugHelper.CheckCondition(TopicChanged!=null,"没有任何类订阅监视数据库改变的TopicChanged事件！");

			ArtAccess aa=new ArtAccess();
			aa.Remove(art);
			
			TopicChanged(art);
		}

		/// <summary>
		/// 置顶
		/// </summary>
		/// <param name="art">要置顶的帖子</param>
		public void Up(Art art)
		{
			DebugHelper.CheckCondition(TopicChanged!=null,"没有任何类订阅监视数据库改变的TopicChanged事件！");

			ArtAccess aa=new ArtAccess();
			aa.Up(art);
			
			TopicChanged(art);
		}

		/// <summary>
		/// 查找帖子信息
		/// </summary>
		/// <param name="art">要填充的帖子</param>
		public void SelectInfo(Art art)
		{
			ArtAccess aa=new ArtAccess();
			aa.SelectInfo(art);
		}
	}
}