单项选择题
You create a Microsoft ASP.NET application by using the Microsoft .NET Framework version 3.5. The application allows users to post comments to a page that can be viewed by other users. You add a SqlDataSource control named SqlDS. You write the following code segment：
01 private void SaveComment（）
02 {
03 string ipaddr；
04 ►
05 SqlDS1.InsertParameters["IPAddress"].DefaultValue = ipaddr；
06 ...
07 SqlDS1.Insert（）；
08 }
You need to ensure that the IP Address of each user who posts a comment is captured alongwith the user’s comment.
Which code segment should you insert at line 04？（）
A.ipaddr = Server["REMOTE_ADDR"].ToString();
B.ipaddr = Session["REMOTE_ADDR"].ToString();
C.ipaddr = Application["REMOTE_ADDR"].ToString();
D.ipaddr = Request.ServerVariables["REMOTE_ADDR"].ToString();
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A.A
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D.D -
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You create a Microsoft ASP.NET application by using the Microsoft .NET Framework version 3.5. The application has a mobile Web form that contains the following ObjectList control： <mobile：ObjectList ID="ObjectListCtrl" OnItemCommand="ObjectListCtrl_ItemCommand" Runat="server"> <Command Name="CmdDisplayDetails" Text="Details" /> <Command Name="CmdRemove" Text="Remove" /> </mobile：ObjectList> You create an event handler named ObjectListCtrl_ItemCommand. You need to ensure that the ObjectListCtrl_ItemCommand handler detects the selection of the CmdDisplayDetails item. Which code segment should you write？（）
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D.D -
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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？（）
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