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Validation controls change all that, because almost all the duplicated logic is encapsulated in the controls.
If a client with Internet Explorer 4.0 or later uses your page, it can do the same input validation that takes place on the server without you having to write any special client script.
The properties simply read and write to the objects in this dictionary. And, when we look back at what data validate was part of XAML in WPF and Phone, we can see it still didn’t give us the functionality we need – Validate(), Is Valid, Is Dirty, and Revert(). With – remember this is not necessarily the solution for you – that developers might introduce to deliver these seemingly simple, yet actually complex and super-valuable features to their models.
Most of the approaches were simply capturing exceptions on properties. I hope you can use this or at least be inspired it.
Large data entry pages generally have an area where all errors are listed.
The Validation Summary automatically generates this content by gathering it up from validator controls on the page. It exposes the all-important "Is Valid" property, which you check in server code to determine if all of the user input is OK.
However, it can be almost impossible to guarantee that every user of your site has the required scripting environment.Validator Walk-Through It's Not Voluntary Getting Regular Comparing Apples and Apples Custom Fit The Finale Sample Code Validating user input is a common scenario in a Web-based application.For production applications, developers often end up spending a lot more time and code on this task than we would like. NET page framework, it was important to try and make the task of validating input a lot easer than it has been in the past.NET and walks through an example of adding validation to a page.
(11 printed pages) Introduction The Problem The Objective The Solution-Overview Client Features What Is a Validator?
It generally appears to the user as a piece of text that displays or hides depending on whether the control it is checking is in error.