单项选择题 You create a Microsoft ASP.NET application by using the Microsoft .NET Framework version 3.5.  You derive a new validation control from the BaseValidator class.  The validation logic for the control is implemented in the Validate method in the following manner. protected static bool Validate(string value) {  ...  }  You need to override the method that validates the value of the related control.  Which override method should you use?（）

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? （）

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 void CustomValidator1_ServerValidate(  object source, ServerValidateEventArgs args) {  DateTime dt = String.IsNullOrEmpty(args.Value)  DateTime.Now : Convert.ToDateTime(args.Value);  args.IsValid = (DateTime.Now - dt).Days < 10;  }  You need to validate the value of TextBox1.  Which code fragment should you add to the Web page?（）