$("#orderBtn").click(function () {
    var menuMap = {};
    $("#menu-body > tr").each(function () {

        var menu_number = $(this).children(".count").children().val();
        if (menu_number > 0) {
            var menu_id = $(this).attr("id");
            menuMap[menu_id] = {
                "MenuId": menu_id,
                "MenuNumber": menu_number
            };
        }
    });
    var data = JSON.stringify(menuMap);
    var url = "https://localhost:7274/Order/Create";

    $.ajax({
        url: url,
        type: "post",
        data: { "data": data },
        success: function (response) {
        },
        error: function (xhr, status, error) {
        }
    })
});

public class OrderController : Controller
{
   [HttpPost]
   [ValidateAntiForgeryToken]
   public ActionResult Create(string data)
   {}
}

why can’t I request my orderController’s Create Method?

When I use ajax to request , it shows 400 bad request.

I tried to console.log the wrong message,but In three parameter xhr,status,error only status shows error message.