Is parameter for controller method with name Message forbidden? - asp.net-core

Question

I have an application with feedback form which is processing by FeedbackController.
#model ClientMessageDto
...
...
<form class="contact-form form-horizontal" asp-action="Enrol" asp-controller="Feedback" asp-anti-forgery="true">
<div class="col-sm-6 col-sm-offset-3">
<div class="form-group">
<label asp-for="Name"></label>
<input asp-for="Name" class="form-control">
</div>
<div class="form-group">
<label asp-for="Email"></label>
<input asp-for="Email" class="form-control">
</div>
<div class="form-group">
<label asp-for="Phone"></label>
<input asp-for="Phone" class="form-control">
</div>
<div class="form-group">
<label asp-for="Message"></label>
<textarea asp-for="Message" class="form-control" rows="2"></textarea>
</div>
<div class="form-group">
<button type="submit" name="submit" class="btn btn-primary btn-lg pull-right">
Send request
</button>
</div>
</div>
</form>
And I have a controller method which should receive DTO from my form
Route("enrol")]
[HttpPost]
[AllowAnonymous]
[ValidateAntiForgeryToken]
public async Task<IActionResult> Enrol([FromForm]ClientMessageDto message)
{
if (ModelState.IsValid)
{
return RedirectToAction("Index", "Home", new {area = ""});
}
return View(clientMessage);
}
This method always receives object with empty fields even if I use [FromForm] attribute.
But it works if I change parameter name to whatever except message (something like messageDto or clientMessage works properly).
Is it ok and 'message' word is forbidden or I should report it as a bug?

Answer 1

This isn't a bug with MVC, it simply due to the conflict between the message parameter that your action method is taking and the Message form field. That's confusing the default model binder. You could probably write your own custom model binder, but as you've already figured out, it's a lot easier to rename either the action method parameter or the form field.