单项选择题 Certkiller.com has employed you as a system administrator. You make sue of .NET Frameworkv3.5 to create an ASP.NET application. The application contains a Web form file. This file isnamed MovieReviews.aspx.  The file is linked to a LinqDataSource DataSource named LinqDataSource1. LinqDataSource1contains a primary key named TestMovieID. The application also contains a DetailsView controlthat is named CKDetailsView. The code below is included in the MovieReviews.aspx file. （The linenumbers is included for reference purposes） 01 <asp：DetailsView ID="DView1" runat="server"DataSourceID="LinqDS1"0304 /> 05 <Fields> 06  <asp：BoundField DataField="TestID" HeaderText="No" InsertVisible="False" 08  ReadOnly="True" SortExpression="TestID" /> 09  <asp：BoundField DataField="Name" HeaderText="Name" 10  SortExpression="Name" /> 11  <asp：BoundField DataField="Cat" HeaderText="Category" SortExpression="Cat" /> 13  <asp：CommandField ShowDeleteButton="false" ShowEditButton="True"  14.  ShowInsertButton="True" /> 15 </Fields> 16 </asp：DetailsView>  All Certkiller clients makes use of DView1. To ensure productivity you need to make sure that theyare able to insert and update content in the control. It is vital that you ensure the prevention ofduplivcation of the link button controls for the Edit and New operations. You thus need todetermine the appropriate code fragment you need to insert at line 3.  What should you do？（）

单项选择题 You work as a Web Developer at Certkiller.com. You are in the process of creating a Webapplication.  You decide to make use of Microsoft ASP.NET 3.5 in order to create the application. The followingmarkup is present on the page：  <asp：TextBox ID="_statusTextBox" runat="server"/>  <asp：Button ID="_button" runat="server" Text="Filter"/>  <asp：SqlDataSource ID="_sqlDataSource" runat="server"   ConnectionString="<%$ ConnectionStrings：Certkiller %>"  SelectCommand="GetUsers" SelectCommandType="StoredProcedure"  FilterExpression="Active=1 AND Name LIKE ’{0}%’">  <FilterParameters>  <asp：ControlParameter ControlID="_statusTextBox"/>  </FilterParameters>  </asp：SqlDataSource>  <asp：GridView ID="_CKGridView" runat="server" DataSourceID="_sqlDataSource"/>  The page is used to retrieve the Users from a company database. However， only the active usersare displayed. The TextBox control allows you to also filter users by status. You do not specify astatus when you click the Filter button. You notice that the page does not filter by active users andshows all the users that are retrieved from the database. You need to make the necessary settingsto ensure that only the active users are being displayed on the page when a status is notspecified.  What should you do？（）

单项选择题 You work as a Web Developer at Certkiller.com. You are in the process of creating a Webapplication using Microsoft ASP.NET 3.5.  This application will be part of a solution that contains a Windows Communication Foundation （WCF） service project. The Web application will be used to make calls to a service identified in theWCF service project. Management is planning to host the Web application on a separate serverfrom the WCF service. They want the WCF service to perform remotely. You need to add areference to the WCF service.  What should you do？（）