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MVC1003: Route attributes cannot be applied to page models

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Value
Rule ID MVC1003
Fix is breaking or non-breaking Non-breaking

Cause

An attribute implementing IRouteTemplateProvider was applied to a Razor Page model.

Rule description

Razor Page models are identified after routing is completed, and consequently cannot contribute a route. Applying a route attribute such as Route to a Razor Page model is not supported.

[Route("/my-page-route")]
public class IndexModel : PageModel
{
    public IActionResult OnGet() => Page();
}

How to fix violations

Remove the route attribute from the page model. Routes can be specified for a Razor Page using an @page directive or by using conventions. For more information, see custom routes in Razor Pages.

When to suppress warnings

Don't suppress warnings from this rule.