单项选择题
A.Add the following marktip to UpdatePanel1. <Triggers> <asp:PostBackTrigger ControlID="btnSave" /> </Triggers>
B.Set the UpdateMode property for the UpdatePanel2 to "Always"
C.Add the following markup to UpdatePanel2 <Triggers> <asp:AsyncPostBackTrigger ControlID="btnSave" EventName="Click" /> </Triggers>
D.Set the UpdateMode property for UpdatePanel2 to "Conditional"
单项选择题 YouaredebugginganASP.NETWebapplicationbyusingtheVisualStudiodebugger.TheapplicationisincorrectlyhandlingaSQLExceptionontheloginpage.Youneedtobreakexecutionwheretheexceptionisthrown.Whatshouldyoudo？（）
单项选择题 YouareimplementinganASP.NETWebpage.Thepageincludesseveralcontrols，butonlyaGridViewrequiresviewstate.YousettheGridView…Youneedtoensurethatthepagewillomitunneededviewstate.Wich@Pagedirectiveshouldyouuse？（）
单项选择题 YoudevelopanASP.NETWebpagethatincludesmultipleWebPartZonecontrols，anEditorZone.UsersreportthattheycannotcustomizethelayoutofthepagebymovingWebPartsfromone.YouneedtoensurethatuserscansuccessfullymoveWebPartsfromonezonetoanother.Whatshouldyoudo？（）