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The runtime looks for Razor Pages files in the Pages folder by default. Index is the default page when a URL doesn't include a page. Writing a basic form Razor Pages is designed to make common patterns used with web browsers easy to implement when building an app.
Consider a page that implements a basic "contact us" form for the Contact model: For the samples in this document, the DbContext is initialized in the Startup.
UseInMemoryDatabase "name" ; services. The PageModel class allows separation of the logic of a page from its presentation.
It defines page handlers for requests sent to the page and the data used to render the page. This separation allows you to manage page dependencies through dependency injection and to unit test the pages. You can add handler methods for any HTTP verb.
The most common handlers are: OnGet to initialize state needed for the page. OnPost to handle form submissions. The Async naming suffix is optional but is often used by convention for asynchronous functions.
The OnPostAsync code in the preceding example looks similar to what you would normally write in a controller. The preceding code is typical for Razor Pages. Most of the MVC primitives like model bindingvalidationand action results are shared.
The previous OnPostAsync method: Check for validation errors. If there are no errors, save the data and redirect.
If there are errors, show the page again with validation messages. Client-side validation is identical to traditional ASP.
In many cases, validation errors would be detected on the client, and never submitted to the server. When the submitted form has validation errors that are passed to the servertheOnPostAsync handler method calls the Page helper method.
Page returns an instance of PageResult.
Returning Page is similar to how actions in controllers return View. PageResult is the default return type for a handler method.Learn to interact with Azure services through quick tutorials. Visual Studio. Minute Tutorials.
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