Asp.net 通过ViewBag传递用户ID

我试图在创建操作中保存标识UserID

控制器GET请求如下所示：

// GET: Owners/Create
public ActionResult Create()
{
    ViewBag.RegUser = User.Identity.GetUserId();
    return View();
}

@Html.HiddenFor(model => model.RegUserID, new { @value = ViewBag.RegUser })

// POST: Owners/Create
// To protect from overposting attacks, please enable the specific properties you want to bind to, for 
// more details see http://go.microsoft.com/fwlink/?LinkId=317598.
[HttpPost]
[ValidateAntiForgeryToken]
public ActionResult Create([Bind(Include = "OwnerID,OwnerName,ContactName,PhysicalAddress1,PhysicalAddress2,PhysicalCity,PhysicalState,PhysicalCountry,PhysicalPostCode,PostalAddress1,PostalAddress2,PostalCity,PostalState,PostalCountry,PostalPostCode,Phone,Mobile,Fax,Email,RegUserID")] Owner owner)
{
    if (ModelState.IsValid)
    {
        db.Owners.Add(owner);
        db.SaveChanges();
        return RedirectToAction("Index");
    }

    return View(owner);
}

@Html.HiddenFor(model => model.RegUserID)

意见如下:

// GET: Owners/Create
public ActionResult Create()
{
    ViewBag.RegUser = User.Identity.GetUserId();
    return View();
}

@Html.HiddenFor(model => model.RegUserID, new { @value = ViewBag.RegUser })

// POST: Owners/Create
// To protect from overposting attacks, please enable the specific properties you want to bind to, for 
// more details see http://go.microsoft.com/fwlink/?LinkId=317598.
[HttpPost]
[ValidateAntiForgeryToken]
public ActionResult Create([Bind(Include = "OwnerID,OwnerName,ContactName,PhysicalAddress1,PhysicalAddress2,PhysicalCity,PhysicalState,PhysicalCountry,PhysicalPostCode,PostalAddress1,PostalAddress2,PostalCity,PostalState,PostalCountry,PostalPostCode,Phone,Mobile,Fax,Email,RegUserID")] Owner owner)
{
    if (ModelState.IsValid)
    {
        db.Owners.Add(owner);
        db.SaveChanges();
        return RedirectToAction("Index");
    }

    return View(owner);
}

@Html.HiddenFor(model => model.RegUserID)

控制员职位申请如下：

// GET: Owners/Create
public ActionResult Create()
{
    ViewBag.RegUser = User.Identity.GetUserId();
    return View();
}

@Html.HiddenFor(model => model.RegUserID, new { @value = ViewBag.RegUser })

// POST: Owners/Create
// To protect from overposting attacks, please enable the specific properties you want to bind to, for 
// more details see http://go.microsoft.com/fwlink/?LinkId=317598.
[HttpPost]
[ValidateAntiForgeryToken]
public ActionResult Create([Bind(Include = "OwnerID,OwnerName,ContactName,PhysicalAddress1,PhysicalAddress2,PhysicalCity,PhysicalState,PhysicalCountry,PhysicalPostCode,PostalAddress1,PostalAddress2,PostalCity,PostalState,PostalCountry,PostalPostCode,Phone,Mobile,Fax,Email,RegUserID")] Owner owner)
{
    if (ModelState.IsValid)
    {
        db.Owners.Add(owner);
        db.SaveChanges();
        return RedirectToAction("Index");
    }

    return View(owner);
}

@Html.HiddenFor(model => model.RegUserID)

但是，保存记录时，RegUserID为空

如果我在@Html Helper上断开，则该值被分配给model.RegUserID，我可以在视图中看到用户ID：

ViewBag.RegUser "7318611e-7e2e-4ee2-9c7b-51b20f0806d8"  dynamic {string}

---

我做错了什么？

为什么不创建一个空的Owner对象并发送get方法，而不是像这样在ViewBag中传递它：

// GET: Owners/Create
public ActionResult Create()
{
    Owner owner = new Owner();
    owner.RegUserId = User.Identity.GetUserId();
    return View(owner);
}

意见如下:

// GET: Owners/Create
public ActionResult Create()
{
    ViewBag.RegUser = User.Identity.GetUserId();
    return View();
}

@Html.HiddenFor(model => model.RegUserID, new { @value = ViewBag.RegUser })

// POST: Owners/Create
// To protect from overposting attacks, please enable the specific properties you want to bind to, for 
// more details see http://go.microsoft.com/fwlink/?LinkId=317598.
[HttpPost]
[ValidateAntiForgeryToken]
public ActionResult Create([Bind(Include = "OwnerID,OwnerName,ContactName,PhysicalAddress1,PhysicalAddress2,PhysicalCity,PhysicalState,PhysicalCountry,PhysicalPostCode,PostalAddress1,PostalAddress2,PostalCity,PostalState,PostalCountry,PostalPostCode,Phone,Mobile,Fax,Email,RegUserID")] Owner owner)
{
    if (ModelState.IsValid)
    {
        db.Owners.Add(owner);
        db.SaveChanges();
        return RedirectToAction("Index");
    }

    return View(owner);
}

@Html.HiddenFor(model => model.RegUserID)

---

无法通过HTML帮助程序为强类型帮助程序指定值

注意：必须将该值指定给属性，然后将其用作隐藏字段。下面给出了一个例子

在您的视图中，创建如下代码

@{
    model.RegUserID = ViewBag.RegUser;
}

@{
    @Html.HiddenFor(model => model.RegUserID)
}

然后创建一个隐藏字段，如下所示

@{
    model.RegUserID = ViewBag.RegUser;
}

@{
    @Html.HiddenFor(model => model.RegUserID)
}

---

在我看来，根本不要添加隐藏字段。在

[HttpPost]Create

中，您可以使用与在

[HttpGet]Create

中相同的方式访问它

// GET: Owners/Create
public ActionResult Create()
{
    return View();
}

// remove RegUserID from Bind Include
[HttpPost]
[ValidateAntiForgeryToken]
public ActionResult Create([Bind(Include = "OwnerID,OwnerName,ContactName,PhysicalAddress1,PhysicalAddress2,PhysicalCity,PhysicalState,PhysicalCountry,PhysicalPostCode,PostalAddress1,PostalAddress2,PostalCity,PostalState,PostalCountry,PostalPostCode,Phone,Mobile,Fax,Email")] Owner owner)
{
    if (ModelState.IsValid)
    {
        owner.RegUser = User.Identity.GetUserId();
        db.Owners.Add(owner);
        db.SaveChanges();
        return RedirectToAction("Index");
    }

    return View(owner);
}

---

与此类似，客户端无法更改

RegUserID

字段。

为什么要这样做，而不是在控制器中设置模型值并将模型传递给视图（无论如何都应该这样做）请显示您的ViewModel

Owner

类和

@html.HiddenFor

帮助程序中呈现的html。还建议您删除可笑的

[Bind（Include=“”）]

属性。默认情况下，所有属性都是绑定的，如果不希望所有属性都使用

[Bind（Exclude=“…”）]

或更好的方法，请使用视图模型[Bind…是在首先使用数据库创建项目时添加的。我是asp.net和MVC新手，因此不知道有什么理由删除它。@StephenMuecke我已经完全删除了绑定。谢谢。如果我这样做，我需要更改视图或POST请求吗？不需要太多，只需要使用Model.RegUser就可以了。而且我也不知道你为什么要这么做在POST方法中提到绑定。通常MVC会绑定您的模型对象。我尝试了这个方法，但效果很好，但下面的答案更清晰。没关系，无论哪个方法对您最有帮助。我只是好奇，您表示希望将UserID传递到GET方法中，但您选择的答案没有传递。实际场景是什么？我正在附加一个用户标识两个表中的一个（所有者或服务公司，取决于注册时的选择）其中包含更多关于它们的信息，并链接到其他表。问题只询问如何将用户ID传递到GET方法，因为我正在学习这些内容，并且不知道更多：-）。幸运的是，你们非常慷慨地提供了建议并帮助我理解。非常感谢！