Blazor AutoComplete Example - Form Validation

This example demonstrates integrating the AutoComplete component within an EditForm using Data Annotations validation. It shows how to bind the AutoComplete value to a model property, surface field-level feedback with ValidationMessage, and combine interactive suggestion selection with Blazor's built-in validation pipeline for reliable data entry.

Validation features:

• Place AutoComplete inside an EditForm and bind its Value to a model property.
• Enforce rules via DataAnnotationsValidator so standard attributes (for example, Required) are validated.
• Allow users to type free text or choose a suggestion from the list; selection updates the bound model value.
• Display clear, inline validation messages adjacent to the AutoComplete field when input does not satisfy declared attributes.

Validation rules applied:

• Required — the field must contain a non-empty, valid value before the form submits successfully.

Form behavior and guidance:

• Click the Submit button to trigger form validation and submit the model when all constraints pass.
• Validation messages appear inline and persist until the input is corrected; use ValidationMessage to render field-specific feedback.
• Validation can be extended using additional data annotation attributes (for example, length or custom validators) while preserving the same EditForm pattern.

This concise sample provides a practical reference for combining AutoComplete with Data Annotations validation in Blazor forms. It includes markup and model patterns to simplify adoption and highlights common integration points so developers can validate interactive selection consistently within application workflows.