单项选择题

A.InitB.LoadC.PreInitD.PreLoadYoucreateanASP.NETpagenam……

You create an ASP.NET page named TestPage.aspx that contains validation controls. You need to verify that all input values submitted by the user have been validated by testing the Page.IsValid property. Which page event should you add an event handler to？（）

A.Init
B.Load
C.PreInit
D.PreLoad

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