事件气泡和MVP:ASP.NET

我正在努力学习MVP

它在ASP.NET中使用web窗体。我有两个用户控件CurrentTimeView.ascx和MonthViewControl.ascx。CurrentTimeView显示时间。在同一控件中有一个用于添加天数的文本框。新得到的日期称为"结果日期"。当点击按钮添加天数时，会引发一个事件"myBtAddDaysClickedEvent"。

在MonthViewControl上，有一个标签显示"结果日期"的月份。目前，我正在为变量"monthValueToPass"设置一个示例值（因为我不知道如何正确执行）如何设置monthValueToPass变量的值，使其符合MVP模型

string monthValueToPass = "TEST";
monthPresenter.SetMonth(monthValueToPass);

期望创建易于进行单元测试且不违反MVP架构的MVP

注意：虽然这是一个简单的例子，但我希望在GridView控件中使用MVP和验证机制对数据绑定给出scalablt的答案。

注意：视图可以完全独立于演示者吗？

注意：每个用户控件在这里都是单独的视图

注意：同一演示者是否可以有多个视图（比如根据其权限为不同用户提供不同的控件？）

指南

1. 模型视图演示者-指导原则

--完整代码-

using System;
public interface ICurrentTimeView
{
    //Property of View
    DateTime CurrentTime 
    {
        set; 
    }
    //Method of View
    void AttachPresenter(CurrentTimePresenter presenter);
}
using System;
public interface IMonthView
{
    //Property of View
    string MonthName 
    {
        set; 
    }
    //Method of View
    //View interface knows the presenter
    void AttachPresenter(MonthPresenter presenter);     
}
using System;
public class CurrentTimePresenter 
{
    private ICurrentTimeView view;
    //Constructor for prsenter
    public CurrentTimePresenter(ICurrentTimeView inputView) 
    {
        if (inputView == null)
        {
            throw new ArgumentNullException("view may not be null");
        }
    }
    this.view = inputView;
}
//Method defined in Presenter
public void SetCurrentTime(bool isPostBack) 
{
    if (!isPostBack) 
    {
        view.CurrentTime = DateTime.Now;
    }
}
//Method defined in Presenter
public void AddDays(string daysUnparsed, bool isPageValid) 
{
    if (isPageValid) 
    {
        view.CurrentTime = DateTime.Now.AddDays(double.Parse(daysUnparsed));           
    }
}
using System;
public class MonthPresenter
{
    private IMonthView monthView;
    //Constructor for prsenter
    public MonthPresenter(IMonthView inputView)
    {
        if (inputView == null)
        {
           throw new ArgumentNullException("view may not be null");
        }
        this.monthView = inputView;
    }

    //Method defined in Presenter
    //How does presenter decides the required value.
    public void SetMonth(string monthValueInput) 
    {
       if (!String.IsNullOrEmpty(monthValueInput))
       {
          monthView.MonthName = monthValueInput;
       }
       else
       {
       }        
    }   
}

用户控制1

<%@ Control Language="C#" AutoEventWireup="true" CodeFile="CurrentTimeView.ascx.cs" Inherits="Views_CurrentTimeView" %>
<asp:Label id="lblMessage" runat="server" /><br />
<asp:Label id="lblCurrentTime" runat="server" /><br />
<br />
<asp:TextBox id="txtNumberOfDays" runat="server" />
<asp:Button id="btnAddDays" Text="Add Days" runat="server" OnClick="btnAddDays_OnClick" ValidationGroup="AddDays" />
using System;
using System.Web.UI;
public partial class Views_CurrentTimeView : UserControl, ICurrentTimeView
{
   //1. User control has no method other than view defined method for attaching presenter
   //2. Properties has only set method
   private CurrentTimePresenter presenter;
   // Delegate 
   public delegate void OnAddDaysClickedDelegate(string strValue);
   // Event 
   public event OnAddDaysClickedDelegate myBtnAddDaysClickedEvent;
   //Provision for getting the presenter in User Control from aspx page.
   public void AttachPresenter(CurrentTimePresenter presenter)
   {
       if (presenter == null)
       {
         throw new ArgumentNullException("presenter may not be null");
       }
       this.presenter = presenter;
   }
   //Implement View's Property
   public DateTime CurrentTime
   {
      set
      {
        //During set of the property, set the control's value
        lblCurrentTime.Text = value.ToString();
      }
   }
   //Event Handler in User Control
   protected void btnAddDays_OnClick(object sender, EventArgs e)
   {
      if (presenter == null)
      {
         throw new FieldAccessException("presenter null");
      }
      //Ask presenter to do its functionality
      presenter.AddDays(txtNumberOfDays.Text, Page.IsValid);
      //Raise event
      if (myBtnAddDaysClickedEvent != null)
      {
        myBtnAddDaysClickedEvent(string.Empty);
      }
   }     
}

用户控制2

<%@ Control Language="C#" AutoEventWireup="true" CodeFile="MonthViewControl.ascx.cs" Inherits="Views_MonthViewControl" %>

using System;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
public partial class Views_MonthViewControl : System.Web.UI.UserControl, IMonthView
{
   //1. User control has no method other than view defined method for attaching presenter
   //2. Properties has only set method
   private MonthPresenter presenter;
   //Provision for gettng the presenter in User Control from aspx page.
   public void AttachPresenter(MonthPresenter presenter)
   {
      if (presenter == null)
      {
         throw new ArgumentNullException("presenter may not be null");
      }
      this.presenter = presenter;
   }
   //Implement View's Property
   public string MonthName
   {
      set
      {
        //During set of the popert, set the control's value
        lblMonth.Text = value.ToString();
      }
   }
   protected void Page_Load(object sender, EventArgs e)
   {
   }    
}

ASPX页面

<%@ Page Language="C#" AutoEventWireup="true" CodeFile="ShowMeTheTime.aspx.cs"      Inherits="ShowTime" %>
<%@ Register TagPrefix="mvpProject" TagName="CurrentTimeView" Src="Views/CurrentTimeView.ascx" %>
<%@ Register TagPrefix="month" TagName="MonthView" Src="Views/MonthViewControl.ascx" %>
<!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>PAGE TITLE </title>
</head>
<body>
<form id="form1" runat="server">
    <mvpProject:CurrentTimeView id="ucCtrlcurrentTimeView" runat="server" 
    />
    <br />
    <br />
    <month:MonthView id="ucCtrlMonthView" runat="server" />
</form>
</body>
</html>
using System;
using System.Web.UI;
public partial class ShowTime : Page
{
    CurrentTimePresenter currentTimePresenter;
    MonthPresenter monthPresenter;
    protected void Page_Load(object sender, EventArgs e) 
    {
       HelperInitCurrentTimeView();
       HelperInitMonth();
    }
    private void HelperInitMonth()
    {
       //Create presenter
       monthPresenter = new MonthPresenter(ucCtrlMonthView);
       //Pass the presenter object to user control
       ucCtrlMonthView.AttachPresenter(monthPresenter);
    }
    private void HelperInitCurrentTimeView() 
    { 
       //Cretes presenter by passing view(user control) to presenter.
       //User control has implemented IView
       currentTimePresenter = new CurrentTimePresenter(ucCtrlcurrentTimeView);
        //Pass the presenter object to user control
        ucCtrlcurrentTimeView.AttachPresenter(currentTimePresenter);
        //Call the presenter action to load time in user control.
        currentTimePresenter.SetCurrentTime(Page.IsPostBack);
        //Event described in User Control ???? Subsribe for it.
        ucCtrlcurrentTimeView.myBtnAddDaysClickedEvent += new Views_CurrentTimeView.OnAddDaysClickedDelegate(CurrentTimeViewControl_AddButtonClicked_MainPageHandler);        
    }
    void CurrentTimeViewControl_AddButtonClicked_MainPageHandler(string strValue)
    {
       string monthValue = "l";
       monthPresenter.SetMonth("SAMPLE VALUE");
       //myGridCntrl.CurentCharacter = theLetterCtrl.SelectedLetter;
       //myGridCntrl.LoadGridValues();
    }
}

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