MVP中的会话管理-简化示例

我在asp页面中有一个文本框，它是一个具体的视图。用户输入一个2000个字符长的字符串。当按下保存按钮时，该值将保存到数据库中。保存页面后，我重定向到另一个页面，输入的值显示为标签。我曾经在会话中存储文本框的值。当我在MVP中使用它时，我该如何处理它？

1） 如何在TextInputPage中使用MVP概念设置会话的值？

2） 如何在使用MVP概念阅读会话后在标签中显示结果？

注意：在向会话添加值之前，需要进行一些处理（文本附加）。

如果你能用代码示例回答，而不是指向另一篇文章，那就太好了。这是新来的人学习的最简单的例子（我认为：-）。

using System;
namespace ViewInterfaces
{
public interface ITextView
{
    string InputtedText { get; }
    event EventHandler ButtonClickedEvent;
}

}

<form id="form1" runat="server">
<div>
    <asp:TextBox ID="txtInput" runat="server"></asp:TextBox>
&nbsp;<asp:Button ID="btnGoToResult" runat="server" Text="Go To Result" 
        onclick="btnGoToResult_Click" />
</div>
</form>

using System;
using ViewInterfaces;
using Presenter;
using Model;
public partial class TextInputPage : System.Web.UI.Page, ITextView
{
public event EventHandler ButtonClickedEvent;
private TextPresenter listPresenter;
protected void Page_Load(object sender, EventArgs e)
{
    TextModel modelController = new TextModel();
    listPresenter = new TextPresenter(this, modelController);
    this.listPresenter.OnViewLoaded();
}
public string InputtedText
{
    get
    {
        return txtInput.Text;
    }
}

protected void btnGoToResult_Click(object sender, EventArgs e)
{
    if (ButtonClickedEvent != null)
    {
        //Riase the event
        ButtonClickedEvent(this, e);
    }

    //Session does not use any MVP now.
    if (txtInput.Text.Length > 0 && txtInput.Text.Length <= 100)
    {
        Session["TextInput"] = "1-100 "+txtInput.Text;
    }
    else if (txtInput.Text.Length > 100 && txtInput.Text.Length <= 1000)
    {
        Session["TextInput"] = "101-1000" + txtInput.Text;
    }
    else
    {
        Session["TextInput"] = "1001 - 2000" + txtInput.Text;
    }

    //Redircting currenlty does not use any MVP concept
    Response.Redirect("/SessionTestWebSite/ResultOutputPage.aspx");
}

}

  <form id="form1" runat="server">
    <div>
    <asp:Label ID="lblResult" runat="server" Text="Label"></asp:Label>
</div>
</form>
using System;
public partial class ResultOutputPage : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
    //Does not use MVP now
    lblResult.Text = (string) Session["TextInput"];
}

}

using System;
using ViewInterfaces;
using Model;
namespace Presenter
{
public class TextPresenter
{
    private ITextView viewObj;
    private TextModel contactsModelController;
    public TextPresenter(ITextView view, TextModel controller)
    {
        viewObj = view;
        contactsModelController = controller;
    }
    //Presenter Method 
    public virtual void OnViewLoaded()
    {
        //Event subscription
        viewObj.ButtonClickedEvent += new EventHandler(DetailView_EditClicked);
    }
    void DetailView_EditClicked(object sender, EventArgs e)
    {
        //Calling Model's Functionality
        contactsModelController.StoreText(viewObj.InputtedText);
    }
}

}

namespace Model
{
public class TextModel
{
    public void StoreText(string inputString)
    {
        //Store to database
    }
}

}

参考文献：mvp会话响应请求

public interface ITextView
{
    string InputtedText { get; }
    string SessionTextEntry { get; set; }
    void RedirectToTestPage();
    event EventHandler ButtonClickedEvent;
}

public partial class TextInputPage : System.Web.UI.Page, ITextView
{
    ...
    public string SessionTextEntry 
    { 
        get { return (string)Session["TextInput"]; }
        set { Session["TextInput"] = value; }
    }
    public void RedirectToTestPage()
    {
        Response.Redirect("/SessionTestWebSite/ResultOutputPage.aspx");
    }
    ...
}

public class TextPresenter
{
    ...
    void DetailView_EditClicked(object sender, EventArgs e)
    {
        //Calling Model's Functionality
        contactsModelController.StoreText(viewObj.InputtedText);
        // Save to session and redirect
        viewObj.SessionTextEntry = GetTextForSession(viewObj.InputtedText);
        viewObj.RedirectToTestPage();
    }
    // data processing logic
    private string GetTextForSession(string inputtedText)
    {
        if (inputtedText.Length > 0 && inputtedText.Length <= 100)
            return "1-100 " + inputtedText;
        if (inputtedText.Length > 100 && inputtedText.Length <= 1000)
            return "101-1000" + inputtedText;
        return "1001 - 2000" + inputtedText;
    }
    ...
}