Validating forms in html
You would add the validation check/message directly to your view, in the form group for the user input: The html helper Validation Message For will look at your model and grab the message you've listed as being for validation and will display it when the user attempts to post the page.Along with the other data annotation on your model variables and a Model State check, it will prevent the user from going forward until the fields have content that meets your checks and prevent the rest of the controller method from executing in the event that something null gets past your checks.attribute works with the following input types: text, search, url, tel, email, and password.Tip: Use the global title attribute to describe the pattern to help the user.Joshua Studley is a Sr UI Engineer at Kelley Blue Book.
While we should still use server-side validation, I’m going to discuss how we can make the most of client-side validation to reduce the number server requests.
You may use the html helper methods to render the input fields as well.
The helpers will generate the markup needed to show validation error messages.
Make sure you have the relevant code for showing the vlaidation messages in your view.
You may use the Validation Summary or/and Validation For helper methods as needed.