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? （）

You create a Microsoft ASP.NET application by using the...

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?（）

You create a Microsoft ASP.NET application by using the...

单项选择题

You create a Microsoft ASP.NET application by using the Microsoft .NET Framework version 3.5. 
You create a custom control named OrderForm. 
You write the following code segment. 
Public Delegate Sub _ 
CheckOrderFormEventHandler(ByVal e As EventArgs) 
Private Shared ReadOnly CheckOrderFormKey As New Object() 
public event CheckOrderFormEventHandler 
Public Custom Event CheckOrderForm As CheckOrderFormEventHandler 
AddHandler(ByVal value As CheckOrderFormEventHandler) 
Events.[AddHandler](CheckOrderFormKey, value) 
End AddHandler 
| English | Chinese | Japan | Korean | - 21 - Test Information Co., Ltd. All rights reserved. RemoveHandler(ByVal value As CheckOrderFormEventHandler) 
Events.[RemoveHandler](CheckOrderFormKey, value) 
End RemoveHandler 
RaiseEvent(ByVal e As EventArgs) 
End RaiseEvent 
End Event 
You need to provide a method that enables the OrderForm control to raise the CheckOrderForm event. 
Which code segment should you use?（）

You create a custom control named OrderForm.  You write...

单项选择题

You create a custom control named OrderForm. 
You write the following code segment. 
public delegate void 
CheckOrderFormEventHandler(EventArgs e); 
private static readonly object CheckOrderFormKey 
= new object(); 
public event CheckOrderFormEventHandler 
CheckOrderForm { 
add { 
Events.AddHandler(CheckOrderFormKey, value); 
} 
remove { 
Events.RemoveHandler(CheckOrderFormKey, 
value); 
} 
} 
You need to provide a method that enables the OrderForm control to raise the CheckOrderForm event. 
Which code segment should you use?（）