Submit button action in MVC controller - asp.net-core

Question

I'm trying to find out the best way to create a submit and add button action in a controller.
I have a HttpGet for Create (Submit) but not sure how to do a HttpPost or if Get or Post is even needed:
[HttpGet]
public IActionResult Create()
{
var drafList = _drService.GetDraft().ToList();
var IndexViewModel = new IndexViewModel();
IndexViewModel.Draft = draftList;
IndexViewModel.Published = _drService.GetPublished();
IndexViewModel.Current = _drService.GetCurrent();
return View(IndexViewModel);
}
<div class="row">
<div class="col-md-4">
<form asp-action="Create">
<div asp-validation-summary="ModelOnly" class="text- danger"></div>
<div class="form-group">
<div class="col-md-3">
<label for="asof">As of:</label>
</div>
<div class="col-md-9">
<input name="AsOf" type="date" title="AsOf" class="form-control" />
</div>
</div>
<div class="clearfix col-md-12"></div>
<div class="clearfix col-md-12"></div>
<div class="form-group">
<div class="col-md-2">
<label for="title">Title:</label>
</div>
<div class="col-md-9 col-md-offset-1">
<input type="text" class="form-control" id="title" />
</div>
<div class="col-md-6">
<input type="submit" value="Add" class="btn btn-primary" />
</div>
</div>
</form>
</div>
</div>
I expect when clicking the Add button to perform the actions in the controller and add the record.

Answer 1

I think you can make a controller action with the same name (create() in this case) but with the [httpPost] prefix on the action so that the form would call the post create action when submitted

Answer 2

GET is for non-destructive actions, i.e. the same GET request should return the same response when repeated. For a create, you need to use a POST. Basically, you need to add an action like:
[HttpPost]
public async Task<IActionResult> Create(IndexViewModel model)
{
if (!ModelState.IsValid)
return View(model);
// map the data posted (`model`) onto your entity class
var entity = new MyEntity
{
Foo = model.Foo,
Bar = model.Bar
};
_context.Add(entity);
await _context.SaveChangesAsync();
return RedirectToAction("Index");
}