Chapter 8. Validation Controls
OBJECTIVES
Investigate the validation controls provided by ASP.NET
Create Web forms that validate data
Before ASP.NET, validating the data users entered onto a Web page either required complex script code that ran in the client browser or a roundtrip to the server to run code on the server side to determine the validity of the data. Things are a lot simpler in ASP.NET. Here, you'll find a series of controls—the validation controls—that make validating data on either the client or server side much simpler.
If your users view your page using an “up-level” browser (that is, IE 4.0 or higher), ASP.NET can render script so that the browser can perform client-side validation. If not, ASP.NET can only validate the controls' ...
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