Validating User Input Forms

In this chapter, we explore the essential aspect of ensuring the accuracy and integrity of data submitted through forms in Blazor applications. With effective validation, you’ll prevent erroneous data entry and enhance user interactions and application security. Throughout this chapter, we will explore a comprehensive range of techniques and strategies you can employ while validating user inputs.

We begin with the fundamental process of adding validation to a form, setting the stage for more complex validation scenarios. You will learn how Blazor handles basic validation scenarios and how you can extend them to meet specific domain needs. After that, we explore the use of data annotations for form validation. You’ll uncover how to simplify form validation using built-in annotations and how to leverage them to enforce rules and constraints directly on data models, reducing boilerplate code. Right after, you will see how to implement custom...