You create a Microsoft ASP.NET application by using the Microsoft .NET Framework version 3.5. The application runs on Microsoft IIS 6.0. You create a page named oldPage.aspx.  
You need to ensure that the following requirements are met when a user attempts to access the page： 
the browser displays the URL of the oldPage.aspx page. the browser displays the page named newPage.aspx   
Which code segment should you use？（）

You create a Microsoft ASP.NET application by using the Microsoft .NET Framework version 3.5. You create a page that contains the following code fragment：  
<asp：ListBox ID="lstLanguages" AutoPostBack="true" runat="server" />   
You write the following code segment in the code-behind file for the page：  
void BindData（object sender， EventArgs e） {  
lstLanguages.DataSource = 
CultureInfo.GetCultures（CultureTypes.AllCultures）；  
lstLanguages.DataTextField = "EnglishName"； 
lstLanguages.DataBind（）；  
}  
You need to ensure that the lstLanguages ListBox control maintains the selection of the user during postback. 
Which line of code should you insert in the constructor of the page？（）

You create a Microsoft ASP.NET application by using the Microsoft .NET Framework version 3.5. You create a page that contains the following control：  
<asp：Calendar EnableViewState="false" ID="calBegin" runat="server" />   
You write the following code segment in the code-behind file for the page：  
void LoadDate（object sender， EventArgs e） {  
if （IsPostBack） {  
calBegin.SelectedDate = （DateTime）ViewState["date"]；
  } 
}   
void SaveDate（object sender， EventArgs e） {
ViewState["date"] = calBegin.SelectedDate；  
}  
You need to ensure that the calBegin Calendar control maintains the selected date. 
Which code segment should you insert in the constructor of the page？（）

You create a Microsoft ASP.NET application by using the Microsoft .NET Framework version 3.5. You create a Web page that has a GridView control named GridView1. The GridView1 control displays the data from a database named Region and a table named Location. You write the following code segment to populate the GridView1 control：  
01 protected void Page_Load（object sender， EventArgs e）  
02 {  
03   string connstr；  
04  
05   SqlDependency.Start（connstr）；  
06   using （SqlConnection connection =  
07     new SqlConnection（connstr））  
08   {  
09     SqlCommand sqlcmd = new SqlCommand（）；  
10     DateTime expires = DateTime.Now.AddMinutes（30）；  
11     SqlCacheDependency dependency = new  
12       SqlCacheDependency（"Region"， "Location"）； 
13     Response.Cache.SetExpires（expires）；  
14     Response.Cache.SetValidUntilExpires（true）；  
15     Response.AddCacheDependency（dependency）；  
16 ► 
17     sqlcmd.Connection = connection；  
18     GridView1.DataSource = sqlcmd.ExecuteReader（）；  
19     GridView1.DataBind（）；  
20   }  
21 } 
You need to ensure that the proxy servers can cache the content of the GridView1 control. 
Which code segment should you insert at line 16？（）