Server-side validation and clint side validation.
How can use validation in mvc ?
2047
10-Jan-2019
Aryan Kumar
18-Jun-2023Sure, I can help you with that.
Validation in MVC is the process of checking that the data submitted by the user is valid. This is done to ensure that the data is correct and that it meets the requirements of the application.
There are two main ways to use validation in MVC:
Here is an example of how to use data annotation attributes to validate a property in a model class:
C#
The Required attribute specifies that the Name property must have a value. The StringLength attribute specifies that the Name property must be a string with a maximum length of 100 characters.
When the user submits the data, the MVC framework will evaluate the data annotation attributes and display any errors to the user. For example, if the user leaves the Name property blank, the MVC framework will display an error message to the user.
Here is an example of how to use client-side validation to validate a property in a view:
HTML
The NameError element is a hidden element that will be displayed if the Name property is invalid. The client-side validation code will check the value of the Name property and display an error message if the value is invalid.
Shrikant Mishra
17-Jan-2019Hi friends,
Today I'm going to describe the use of validation in asp.net MVC. If you have used validation control in ASP.NET, it will be easy for you. So let's start it...
First of all, we should discuss about to validation. Like as :
What is validation?
That is the process of evaluating software during the development process or at the end of the development process to determine whether it satisfies specified business requirements. The validation testing ensures that the product actually meets the client's needs. This can also be defined as to demonstrate that the product fulfills its intended use when deployed on an appropriate environment.
Using the Data Annotation Validator Attributes
If we use the Data Annotations Model Binder, we use validator attributes to perform validation. where System.ComponentModel.DataAnnotations namespace includes the following validator attributes:
Note : When we need validation are not satisfied by any of the standard validators then you always have the option of creating a custom validator attribute by inheriting a new validator attribute from the base Validation attribute.
That is the goal of the web form validation is to ensure that the user provided necessary and properly formatted information needed to successfully complete an operation. Into this article, we will go beyond the validation itself and explore different validation and error feedback techniques, methods and approaches.
SERVER-SIDE VALIDATION
Into the server-side validation, information is being sent to the server and validated using one of the server-side languages. Whether the validation fails, the response is then sent back to the client, the page that contains the web form is refreshed and feedback is shown. That method is secure because it will work even if JavaScript is turned off in the browser and it can’t be easily bypassed by malicious users. Through the other hand, users will have to fill in the information without getting a response until they submit the form. It results in a slow response from the server.
Model.cs
create.cshtml
CLIENT-SIDE VALIDATION
Here we know that Server-side validation is enough to have a successful and secure form validation. But, for better user experience, however, you might consider using client-side validation. These type of validation are done on the client using script languages such as JavaScript. Through, the using script languages user’s input can be validated as they type. It means a more responsive, visually rich validation. By the client-side validation, the form never gets submitted if validation fails. The validation is being handled in JavaScript methods that you create (or within frameworks/plugins) and users get immediate feedback if validation fails.
By the client-side validation, the form never gets submitted if validation fails. The validation is being handled in JavaScript methods that you create (or within frameworks/plugins) and users get immediate feedback if validation fails.
The major drawback of client-side validation is that it relies on JavaScript. Whether the users turn JavaScript off, they can easily bypass the validation. It is why validation should always be implemented on both the client and server. Through combining server-side and client-side methods we can get the best of the two: fast response, more secure validation and better user experience.
Useful resources
Here are some of the frameworks, plugins, and tutorials that might help you easily implement validation in your forms.