Basic usage

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The Validator component is part of Telerik UI for ASP.NET Core, a professional grade UI library with 110+ components for building modern and feature-rich applications. To try it out sign up for a free 30-day trial.


The Telerik UI for ASP.NET Core Validator is a component that supports a wide range of validation rules for different types of data input, and it also offers the option for setting custom rules. The Validator control is useful in any situation that requires user input. This demo showcases a Form component which is a common scenario for need of validation. The Validator rules used here are for required fields, and specific formats such as email and phone number. The demo also gives an example of a custom rule applied to the start time input.

This Validator example is part of unique collection of hundreds of ASP.NET Core demos, with which you can see all Telerik ASP.NET Core components and their features in action. View the source code of each of them or directly adapt and edit them, including their theme appearance, in Telerik REPL for ASP.NET Core.

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