MVP设计模式

相比较而言我喜欢MVP  V视图，p中介者，m模型，轻量设计模式，将藕合降到最低还是很不错的，今天小小的学习了下~~流个念~~

psb、

处理流程

第一由mvp.aspx发起请求(一般该页面会继承一个视图接口)ProductPresenter类接收请求，并传递到合适的模型上

第2模型ProductService接收请求并开始处理

第3~4为后台处理数据

第5返回处理数据到ProductPresenter类

第六ProductPresenter在返回到页面mvp.aspx

代码--没有经过修改~~凑合看吧

using System;
namespace Chapter2.Web.Interface
{
    /// <summary>
    /// 视图接口
    /// </summary>
    public interface IProductView
    {
        void DesplayProducts(System.Collections.Generic.List<Chapter2.Repository.Product> data);
    }
}
using System;
using System.Data;
using System.Configuration;
using System.Collections;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;

/// <summary>
/// IProductView继承试图操作
/// </summary>
public partial class Default4 : System.Web.UI.Page, Chapter2.Web.Interface.IProductView
{
    private Chapter2.Web.Presenter.ProductPresenter preseter=null;
    protected override void OnInit(EventArgs e)
    {
        base.OnInit(e);
        //--初实化
        preseter = new Chapter2.Web.Presenter.ProductPresenter();
        preseter.Init(this);
    
    }
    protected void Page_Load(object sender, EventArgs e)
    {
        if (!Page.IsPostBack)
        {
           // preseter.Init(this);
            preseter.LoadProductsByCategory(1);   
        }


    }


    public void DesplayProducts(System.Collections.Generic.List<Chapter2.Repository.Product> data)
    {
        this.GridView1.DataSource = data;
        this.GridView1.DataBind();
    }
    protected void DropDownList1_SelectedIndexChanged(object sender, EventArgs e)
    {
        int Category =Convert.ToInt16(DropDownList1.SelectedValue);
        preseter.LoadProductsByCategory(Category);
    }
}
<%@ Page Language="C#" AutoEventWireup="true" CodeFile="mvp.aspx.cs" Inherits="Default4" %>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<html xmlns="http://www.w3.org/1999/xhtml" >
<head runat="server">
    <title>无标题页</title>
</head>
<body>
    <form id="form1" runat="server">
    <div>
        查询<asp:DropDownList ID="DropDownList1" runat="server" AutoPostBack="True" OnSelectedIndexChanged="DropDownList1_SelectedIndexChanged">
            <asp:ListItem>1</asp:ListItem>
            <asp:ListItem>2</asp:ListItem>
            <asp:ListItem>3</asp:ListItem>
            <asp:ListItem>4</asp:ListItem>
            <asp:ListItem>5</asp:ListItem>
            <asp:ListItem>6</asp:ListItem>
        </asp:DropDownList>
        <asp:GridView ID="GridView1" runat="server">
        </asp:GridView>
        &nbsp;
    
    </div>
    </form>
</body>
</html>
using System;
using System.Data;
using System.Configuration;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;
namespace Chapter2.Web.Presenter
{
    /// <summary>
    /// ProductPresenter控制器
    /// </summary>
    public class ProductPresenter
    {
        Chapter2.Service.ProductService service= null;
        private Chapter2.Web.Interface.IProductView view = null;

        
        public ProductPresenter()
        {
            service = new Chapter2.Service.ProductService();
            //
            // TODO: 在此处添加构造函数逻辑
            //
        }
        public void Init(Chapter2.Web.Interface.IProductView inputView)
        {
            view = inputView;
        }
        public void LoadProductsByCategory(int categoryid)
        {
            System.Collections.Generic.List<Chapter2.Repository.Product> data = service.GetAllProductsFrom(categoryid);
            if(data!=null&&data.Count>0)
            {
             this.view.DesplayProducts(data);
            
            }
        
        }
    }
}
using System;
using System.Collections.Generic;
using Chapter2.Repository;
namespace Chapter2.Service
{

    /// <summary>
    /// ProductService 的摘要说明
    /// </summary>
    public sealed class ProductService
    {
        private Chapter2.Repository.IProductRepository productRepository = null;
        private Chapter2.Cache.ICacheStorage cache = null;
        public ProductService()
        {
            productRepository = Chapter2.Factory.RepositoryFactory.GetRepository();
            cache=Chapter2.Factory.CacheFactory.GetCache();
     
        }


        public List<Product> GetAllProductsFrom(int categoryId)
        {

            List<Product> l = new List<Product>();
            try
            {
                string cacheKey = string.Format("products_in_category_{0}", categoryId);
                l = cache.Get(cacheKey) as List<Product>;
                if (l == null)
                {
                    l = productRepository.getProductsFrom(categoryId);
                    if (l != null && l.Count > 0)
                    {
                        cache.Add(cacheKey, l);
                    }
                
                }
            }
            catch (System.Exception exp)
            { 
            }
            finally
            { 
            }
            return l;
        }
    }
}
using System;
using System.Collections.Generic;
namespace Chapter2.Repository
{

    /// <summary>
    /// IProductRepository 的摘要说明
    /// </summary>
    public interface IProductRepository
    {
        List<Product> getProductsFrom(int categoryId);
    
    }
}
using System;
using System.Collections.Generic;
namespace Chapter2.Repository
{
    /// <summary>
    /// liujiaRepository 的摘要说明
    /// </summary>
    public sealed class liujiaRepository : IProductRepository
    {
        public liujiaRepository()
        {
            //
            // TODO: 在此处添加构造函数逻辑
            //
        }


        public List<Product> getProductsFrom(int categoryId)
        {

            List<Product> l = new List<Product>();
            Product p = new Product();
            p.CategoryId=categoryId;
            l.Add(p);
            return l;
        }
    }
}
【推广】 免费学中医，健康全家人
原文地址：https://www.cnblogs.com/angellapples/p/3283704.html