[单选] You create a Web Form. The Web Form uses the FormView control to enable a user to edit a record in the database. When the user clicks the Update button on the FormView control, the application must validate that the user has entered data in all of the fields. You need to ensure that the Web Form does not update if the user has not entered data in all of the fields. Which code segment should you use? （）

A . Protected Sub FormView1_ItemUpdating(ByVal sender As Object, _ ByVal e As System.Web.UI.WebControls.FormViewUpdateEventArgs) _ Handles FormView1.ItemUpdating Dim entry As DictionaryEntry For Each entry In e.Keys If entry.Value.ToString() = System.String.Empty Then e.Cancel = True Return End If Next entryEnd Sub
B . Protected Sub FormView1_ItemUpdated(ByVal sender As Object, _ ByVal e As System.Web.UI.WebControls.FormViewUpdatedEventArgs) _ Handles FormView1.ItemUpdated Dim entry As DictionaryEntry For Each entry In e.NewValues If entry.Value.Equals("") Then e.KeepInEditMode = True Return End If Next entryEnd Sub
C . Protected Sub FormView1_ItemUpdating(ByVal sender As Object, _ ByVal e As System.Web.UI.WebControls.FormViewUpdateEventArgs) _ Handles FormView1.ItemUpdating Dim entry As DictionaryEntry For Each entry In e.NewValues If entry.Value.Equals("") Then e.Cancel = True Return End If Next entryEnd Sub
D . Protected Sub FormView1_ItemUpdated(ByVal sender As Object, _ ByVal e As System.Web.UI.WebControls.FormViewUpdatedEventArgs) _ Handles FormView1.ItemUpdated Dim entry As DictionaryEntry For Each entry In e.Keys If entry.Value.ToString() = System.String.Empty Then e.KeepInEditMode = True Return End If Next entryEnd Su

You are developing an ASP.NET Web application. You create a master page. The master page requires a region where you can add page-specific content by using theASP.NET page designer. You need to add a control to the master page to define the region. Which control should you add？（） PlaceHolder。 ContentPlaceHolder。 Content。 Substituitio。如果从国家投资主体的角度来看，企业所得税不能作为现金流出量来看待，只有从企业投资主体的角度才将企业所得税列作现金流出量。 Your network consists of an Active Directory forest that contains one domain named contoso.com. All domain controllers run Windows Server 2008 R2 and are configured as DNS servers. You have two The safer ， easier way to help you pass any IT exams. 10 / 90 Active Directory-integrated zones： contoso.com and nwtraders.com. You need to ensure a user is able to modify records in the contoso.com zone. You must prevent the user from modifying the SOA record in the nwtraders.com zone. What should you do（） From the DNS Manager console， modify the permissions of the contoso.com zone.。 From the DNS Manager console， modify the permissions of the nwtraders.com zone.。 From the Active Directory Users and Computers console， run the Delegation of Control Wizard.。 From the Active Directory Users and Computers console， modify the permissions of the Domain Controllers organizational unit （OU）.。 Which of the following commands will cause RIPng to originate a default route advertisement whilesuppressing all other routes？（） Rl（config-if）#ipv6 default-information originate。 Rl（config-router）#ipv6 rip 〈process-name〉 default-information only。 Rl（config）#ipv6 route ：：/0 null 0。 Rl（config-if）#ipv6 rip 〈process-name〉 default-information only。 Rl（config-router）#ipv6 rip route ；：/0 originate。 Rl（config-router）#aggregate-address ：：/0 summarize-route。陶片放逐法 You create a Web Form. The Web Form uses the FormView control to enable a user to edit a record in the database. When the user clicks the Update button on the FormView control, the application must validate that the user has entered data in all of the fields. You need to ensure that the Web Form does not update if the user has not entered data in all of the fields. Which code segment should you use? （）

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