themelogic.cs

来自「基于Asp.net、MS sql sever 2000、C# 论坛系统源码」· CS 代码 · 共 92 行

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

namespace Stella.BusinessLogic
{
	/// <summary>
	/// 版块操作
	/// </summary>
	public class ThemeLogic
	{
		/// <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 ThemeLogic(DBChangedEventHandler handler)
		{
			DBChanged+=handler;
		}

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

		/// <summary>
		/// 数据库改变事件
		/// </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 DBChangedEventHandler DBChanged;

		/// <summary>
		/// 创建新版块
		/// </summary>
		/// <param name="district">乘放待添加的版块的集合</param>
		public void Create(District district)
		{
			DebugHelper.CheckCondition(DBChanged!=null,"没有任何类订阅监视数据库改变的DBChanged事件！");
			ThemeAccess ta=new ThemeAccess();
			ta.Create(district);

			DBChanged();
		}

		/// <summary>
		/// 更新版块的资料
		/// </summary>
		/// <param name="theme">要更新的版块</param>
		public void Update(Theme theme)
		{
			DebugHelper.CheckCondition(DBChanged!=null,"没有任何类订阅监视数据库改变的DBChanged事件！");
			ThemeAccess ta=new ThemeAccess();
			ta.Update(theme);
			
			DBChanged();
		}

		/// <summary>
		/// 删除版块
		/// </summary>
		/// <param name="id">该版块的id</param>
		public void Remove(int id)
		{
			DebugHelper.CheckCondition(DBChanged!=null,"没有任何类订阅监视数据库改变的DBChanged事件！");
			ThemeAccess ta=new ThemeAccess();
			ta.Remove(id);
			
			DBChanged();
		}

		/// <summary>
		/// 使用主题填充版块
		/// </summary>
		/// <param name="theme">要填充的版块</param>
		/// <param name="pageSize">每页大小</param>
		/// <param name="pageNumber">当前页数</param>
		public void FillWithTopics(Theme theme,int pageSize,int pageNumber)
		{
			ThemeAccess ta=new ThemeAccess();
			ta.FillWithTopics(theme,pageSize,pageNumber);
		}

	}
}