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Validating data in asp

Now, we are going to discuss the validation available in data annotation only by one.

Introduction Validating user input has always been a challenging task for the Web developers.

We not only want validation of logic executing in the browser, but we also must validate the logic running on the Server.

In these scenarios you should disable request validation for the smallest surface possible. NET Web Forms applications prior to v4.5, you will need to disable request validation at the page level.

Be aware that when doing this all input values (cookies, query string, form elements) handled by this page will not be validated by ASP.

For keeping this article simple and easily understandable, I am dividing data annotation validation in two parts. Prerequisite For easy understanding of this article, you should have minimal ASP. At least, you should be aware about controller view models etc.

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With these attributes in place, if someone tries to submit the page without proving the , they will see the default error, shown above.

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When we talk about the validation in MVC framework context, we primarily focus on validating the model value. We will see how annotations go beyond just validation.Note Data annotations are the attributes that we can find in the namespace.These attributes provide Server side validation and the framework also supports client side validation.The client side logic gives the users instant feedback on the information they entered into a Web page and is an expected feature in today’s applications.Meanwhile, the server validation logic is in place because you should never trust information arriving from the network.NET MVC Application and named it as This is the initial set up and we need to run this data annotation validation project.