你可能感興趣的試題

You create a Microsoft ASP.NET application by using the Microsoft .NET Framework version 3.5. The application contains the following code segment：  
public class CapabilityEvaluator  { 
public static bool ChkScreenSize（System.Web.Mobile.MobileCapabilities cap， String arg） { int screenSize = cap.ScreenCharactersWidth * cap.ScreenCharactersHeight；  
return screenSize < int.Parse（arg）；
  } 
}   
You add the following device filter element to the Web.config file：  
<filter name="FltrScreenSize" 
  type="MyWebApp.CapabilityEvaluator，MyWebApp"   
method="ChkScreenSize" />   
You need to write a code segment to verify whether the size of the device display is less than 80 characters. 
Which code segment should you use？（）

You create a Microsoft ASP.NET application by using the Microsoft .NET Framework version 3.5. You create an AJAX-enabled Web form by using the following code fragment：  
<asp：ScriptManager ID="scrMgr" runat="server" />  
<asp：UpdatePanel runat="server" ID="updFirstPanel" UpdateMode="Conditional">  
<ContentTemplate>  
<asp：TextBox runat="server" ID="txtInfo" />  
<asp：Button runat="server" ID="btnSubmit" Text="Submit" /> 
 </ContentTemplate>  
</asp：UpdatePanel>  
<asp：UpdatePanel runat="server" ID="updSecondPanel" UpdateMode="Conditional">  <ContentTemplate> ... 
</ContentTemplate>  
</asp：UpdatePanel>   
When the updFirstPanel UpdatePanel control is updated， a dynamic client script is registered. You write the following code segment in the code-behind file of the Web form：  
01 protected void Page_Load（object sender， EventArgs e）  
02 {  
03   if（IsPostBack）  
04   {  
05     string generatedScript = ScriptGenerator.GenerateScript（）；  
06 ► 
07   }  
08 }   
You need to ensure that the client-script code is registered only when an asynchronous postback is issued on the updFirstPanel UpdatePanel control. 
Which code segment should you insert at line 06？ （）