在C# (ASP.NET核心MVC)中从两个不同的下拉列表中传递2个值-不确定

public class LocationViewModel
{
    public string SelectedCountry { get; set; }
    public string SelectedCity { get; set; }

    public List<SelectListItem> Countries { get; set; }
    public List<SelectListItem> Cities { get; set; }
}

public class HomeController : Controller
{
    public IActionResult Index()
    {
        var model = new LocationViewModel
        {
            Countries = new List<SelectListItem>
            {
                new SelectListItem { Value="US", Text="United States" },
                new SelectListItem { Value="CA", Text="Canada" }
            },
            Cities = new List<SelectListItem>
            {
                new SelectListItem { Value="NYC", Text="New York City" },
                new SelectListItem { Value="LA", Text="Los Angeles" }
            }
        };
        return View(model);
    }

    [HttpPost]
    public IActionResult SubmitLocation(LocationViewModel model)
    {
        if (ModelState.IsValid)
        {
            // 处理提交的国家和城市值
            string selectedCountry = model.SelectedCountry;
            string selectedCity = model.SelectedCity;
            // 进行后续操作，例如保存到数据库
        }
        return View(model);
    }
}

@model LocationViewModel

<form asp-action="SubmitLocation" method="post">
    <div>
        <label asp-for="SelectedCountry">Country:</label>
        <select asp-for="SelectedCountry" asp-items="Model.Countries"></select>
    </div>
    <div>
        <label asp-for="SelectedCity">City:</label>
        <select asp-for="SelectedCity" asp-items="Model.Cities"></select>
    </div>
    <button type="submit">Submit</button>
</form>