单项选择题
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" />
| English | Chinese | Japan | Korean | - 73 - Test Information Co., Ltd. All rights reserved. <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. (Line numbers are included
for reference only.)
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?()
A.A
B.B
C.C
D.D
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