How to RedirectToAction specifying the action http method?-CodePudding

I want to execute a POST action by redirecting to another controller. My issue is how to do it with two same name actions.

CartLinesController.cs

// GET: CartLines/Create
    public IActionResult Create(){}

   [HttpPost]
   [ValidateAntiForgeryToken]
   public async Task<IActionResult> Create(parameters){}

I'm calling these actions from another controller.

ProductsController.cs

public IActionResult AddToCart(int id)
    {
        TempData["ProductId"] = id;
        return RedirectToAction("Create", "CartLines");
    }

The issue is this RedirectToAction is calling the GET: Create action instead of the POST one. Is there a way to specify this?

CodePudding user response：

You should do it manually. First of all redirect to a GET route. In that route, return a HIDDEN form with auto-submit (maybe javascript wise) to your POST action with POST method.

See this, HTTP-redirection does not support POST out of the box.

CodePudding user response：

HTTP doesn't support redirection to a page using POST. When you redirect somewhere, the HTTP "Location" header tells the browser where to go, and the browser makes a GET request for that page.

You can redirect to the Get method first, and pass a bool value to distinguish whether to execute automatically or manually. For example:

public IActionResult AddToCart(int id)
{
    TempData["ProductId"] = id;
    return RedirectToAction("Create", "CartLines",new { parameter = true});
}

public IActionResult Create(bool? parameter)
{
    ViewData["parameter"] = parameter;
    return View();
}

Then judge whether ViewData["parameter"] exists in the view, and if so, use JavaScript to automatically call the post method.