单项选择题 YouworkasanASP.NETWebApplicationDeveloperforSomeCompany.ThecompanyusesVisualStudio.NET2010asitsapplicationdevelopmentplatform.YouarecreatinganASP.NETWebapplicationusing.NETFramework4.0.TheWebapplicationcomprisesaclassnamedEmployeewithpropertiesnamedasFirstName，LastName，andAge.YouaddaWebpageinwhichyougetalistofEmployeeobjectsanddisplaythoseobjectsinaGridViewcontrol.YouarerequiredtoaddcodesothattheGridViewrowishighlightedinredcoloriftheageoftheemployeeislessthan21years.Whatwillyoudotoaccomplishthis？（）

单项选择题 YouworkasanASP.NETWebApplicationDeveloperforSomeCompany.ThecompanyusesVisualStudio.NET2010asitsapplicationdevelopmentplatform.YoucreateanASP.NETWebapplicationusing.NETFramework4.0.YoucreateaWebpageintheapplication.TheWebpagewillgetlargesetsofdatafromadatasource.YouaddaDataPagercontroltothepage.YouarerequiredtodisplaynavigationcontrolsthatenableyoutocreateacustompagingUlfortheDataPagercontrol.Whatwillyoudo？（）

单项选择题 WhicheventoftheGridViewclassoccurswhentheEditbuttonofarowisclicked，butbeforetheGridViewcontrolenterseditmode？（）