(The default for this page, if implemented, would be e-mail confirmation.) By default, the Web Forms page automatically validates that malicious users are not attempting to send script to your application even if you do not use validation controls. For information about the difference between these Web project types, see text box can be converted to a date value. The first is the custom validation code that runs when the page is submitted.For more information, see In the first part of the walkthrough, you will create a Web site and a page where you can work with styles. You must always have server-side validation logic for a control as well.The page you create will prompt the user for an e-mail address, the number of people to reserve for, and a preferred date.The page also allows the user to request a telephone confirmation of the reservation.For those whose management has proved resistant to suggestions for improving security in these areas, or who simply need help in composing a message to management that will make your point clearly so that it isn't misunderstood, I hope you find the following checklist of Web security practices helpful.A note about TLS and SSLv3: TLS and SSLv3 are, in fact, almost identical protocols.In the walkthrough, you will create a page for a Web site that allows visitors to request a reservation.Because the purpose of the walkthrough is to illustrate validation, the nature of the reservation is not important (for example, if could be for a restaurant, a community center meeting room, or something else), and the page does not actually process the reservation.
For those of you who haven't considered all these factors in managing your Web resources, I recommend dealing with what you have left unconsidered as quickly as possible.
You will also create a custom validator with code that you write, which illustrates how you can add your own logic to the validation framework in the page.
Finally, you will learn how you can validate user input conditionally, depending on choices that the user makes in a page.
Web applications are notorious for taking practically any type of input, assuming that it's valid, and processing it further.
Not validating input is one of the greatest mistakes that Web-application developers can make.