asp.net技术内幕的书配源码

				
				
				Sub Button_Click( s As Object, e As EventArgs )
				  If IsValid Then
				    Response.Redirect( "ThankYou.aspx" )
				  End If
				End Sub
				
				
				
				
				RegularExpressionValidatorLength.aspx
				
				
				
				
				Enter your last name:
				(no more than 10 characters)
				
								  id="txtLastname"
				  Columns="50"
				  Runat="Server"/>
				
								  ControlToValidate="txtLastname"
				  Display="Dynamic"
				  Text="Your last name can contain
				        a maximum of 10 characters and no spaces!"
				  ValidationExpression="\S{0,10}"
				  Runat="Server" />
				
				
								  Text="Submit"
				  OnClick="Button_Click"
				  Runat="Server"/>