Developing Applications with ASP.NET Core/

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HTTP POST and PUT

HTTP POST and PUT

Learn to create action methods for creating and updating data via JSON Web APIs.

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POST

You will create an action method to handle POST requests and call it PostUser(). It will take the object User as an input parameter.

Code snippet

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[HttpPost]
public async Task<ActionResult<User>> PostUser(User user)
{
    _context.Users.Add(user);
    await _context.SaveChangesAsync();
    return CreatedAtAction("GetUser", new { id = user.ID }, user);
}

Explanation

The method is annotated with [HttpPost]. This will help the framework identify the request type. The route will be /Api/User with request type POST.

Your action method return type is Task<ActionResult<User>>. Break this down to get a better understanding of what is going on:

  • ActionResult<>: The return type could be User but that would not be able to handle exceptions. A different return type is needed for exceptions. To
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