And assign a different group name to the validators on those section.

1) If you are initiating an ajax call or initiating a callback from java-script, and you want to validate certain section/part of the page.

AJAX also played a key role, for partial post back, initiate a call to server etc, which requires to validate a part of the page.

So in these scenarios our earlier approach of validation would not work.

Validation plays a key role whenever we take a inputs from the user. NET provides us few validator controls that are used a lot in web applications.

Now a days, in our application, we used to have several section in our web pages.

This tutorial covers Validating User Input with C# covers Overview of ASP.

NET Validation Controls , Using the Simple Validators , Using the Complex Validators and Summarizing Results with the Validation Summary Control.

An application service method should first check (validate) input and then use it. NET Boilerplate provides a good infrastructure to automatically validate all inputs of an application for; See Disabling Validation section to disable validation if needed. NET Boilerplate supports data annotation attributes. Assume that we're developing a Task application service that is used to create a task and gets an input as shown below: Here, Description property is marked as Required. There are also many attributes (like Max Length, Min Length, Regular Expression...) in System. It also throws Abp Validation Exception if any of the input properties are invalid. NET MVC's validation but notice that an application service class is not derived from Controller, it's a plain class and can work even out of a web application. In addition to ICustom Validate, ABP also supports . You can also implement it to perform additional custom validations. While using this site, you agree to have read and accepted our terms of use and privacy policy. The risk from using it lies entirely with the user. It's better to check a form first in the client and show invalid fields to the user.But, server-side validation is more critical and unavoidable. NET Boilerplate also checks if input is null and throws Abp Validation Exception if so.