PreviousPage用法

<% @ Page Language = " C# "  AutoEventWireup = " true "   CodeFile = " Default.aspx.cs "  Inherits = " _Default "   %>

<! 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 >
         < asp:TextBox ID = " TextBox1 "  runat = " server " ></ asp:TextBox >
         < asp:Button ID = " Button1 "  runat = " server "  PostBackUrl = " ~/test.aspx "  Text = " Button "   />
     </ div >
     </ form >
</ body >
</ html >

<% @ Page Language = " C# "  AutoEventWireup = " true "  CodeFile = " test.aspx.cs "  Inherits = " test "   %>

<! 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 >
         < asp:Label ID = " Label1 "  runat = " server "  Text = " Label " ></ asp:Label >     
     </ div >
     </ form >
</ body >
</ html >

using  System;
using  System.Collections;
using  System.Configuration;
using  System.Data;
using  System.Linq;
using  System.Web;
using  System.Web.Security;
using  System.Web.UI;
using  System.Web.UI.HtmlControls;
using  System.Web.UI.WebControls;
using  System.Web.UI.WebControls.WebParts;
using  System.Xml.Linq;

public   partial   class  test : System.Web.UI.Page
{
    protected void Page_Load(object sender, EventArgs e)
    {
        string text;
        text = ((TextBox)PreviousPage.FindControl("TextBox1")).Text;
        Label1.Text = text;
    }
}