我有这个表单在我的页面上。它是为了添加一些项目到DB。项目需要为自己的导演，所以我传递工人的SelectList到这个表单。

<form asp-controller="Project" asp-action="Edit" method="post">
...some other fields...
@if (ViewBag.workers != null)
    {
        <div>
            <label asp-for="director">Director</label>
            <select asp-for="director" asp-items=@ViewBag.workers>
            </select>
            <span asp-validation-for="director"></span>
        </div>
    }
...
</form>

选择标签工作，有我的工人。但当我试图提交，我有错误“* 导演字段是必需的。*”

我用js检查了表单，它有来自select选项的数据，但我的后处理程序没有。

有哈德勒的密码

[HttpPost]
    public IActionResult Edit(Project model)
    {
        // here model hasn't director field
        if (ModelState.IsValid)
        {
            dataManager.project.SaveProject(model);
            return RedirectToAction(nameof(HomeController.Index), nameof(HomeController).Replace("Controller", ""));
        }
        ViewBag.workers = new SelectList(dataManager.worker.GetAllWorkers(), nameof(Worker.id), nameof(Worker.name));
        return View(model);
    }

和项目类代码

public class Project
{
    [Required] public Guid id { set; get; }
    
    [Required] public string name { set; get; }
    
    public string customer { set; get; }

    public string executor { set; get; }

    public Worker director { set; get; }

    public DateTime start { set; get; }

    public DateTime end { set; get; }

    public uint priority { set; get; }
}