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单项选择题 You create a Microsoft ASP.NET application by using the Microsoft .NET Framework version 3.5.  You add a TextBox control named TextBox1.  You write the following code segment for validation.  Protected Sub _  | English | Chinese | Japan | Korean | - 24 - Test Information Co., Ltd. All rights reserved. CustomValidator1_ServerValidate(ByVal source As Object, _  ByVal args As ServerValidateEventArgs)  Dim dt As DateTime = _  IIf([String].IsNullOrEmpty(args.Value), _  DateTime.Now, Convert.ToDateTime(args.Value))  args.IsValid = (DateTime.Now - dt).Days < 10  End Sub  You need to validate the value of TextBox1.  Which code fragment should you add to the Web page? ()

A、

B、

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G、

H、

  • B
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