MVC4 PartialViewResult返回视图而不是PartialView

Question

I have an LogInOrRegister page in my application, that calls 2 child actions LogInOrRegister.cshtml

@{
    ViewBag.Title = "Log in";
}

@Html.Action("Login", "Account", new { returlUrl = ViewBag.ReturnUrl})
@Html.Action("Register", new { returlUrl = ViewBag.ReturnUrl})

@section Scripts {
    @Scripts.Render("~/bundles/jqueryval")
}

The Login PartialView is:

@model Com.WTS.Portal.Models.LoginModel
<hgroup class="title">
    <h1>@ViewBag.Title</h1>
</hgroup>

<section id="loginForm">
<h2>Use a local account to log in.</h2>
@using (Html.BeginForm(new { ReturnUrl = ViewBag.ReturnUrl })) {
    @Html.AntiForgeryToken()
    @Html.ValidationSummary(true)

    <fieldset>
    <legend>Log in Form</legend>
    <ol>
        <li>
            @Html.LabelFor(m => m.Email)
            @Html.TextBoxFor(m => m.Email)
            @Html.ValidationMessageFor(m => m.Email)
        </li>
        <li>
            @Html.LabelFor(m => m.Password)
            @Html.PasswordFor(m => m.Password)
            @Html.ValidationMessageFor(m => m.Password)
        </li>
        <li>
            @Html.CheckBoxFor(m => m.RememberMe)
            @Html.LabelFor(m => m.RememberMe, new { @class = "checkbox" })
        </li>
    </ol>
    <input type="submit" value="Log in" />
    </fieldset>
}
</section>

My AccountController.cs contains the following code:

    [AllowAnonymous]
    public PartialViewResult Login(string returnUrl)
    {
        ViewBag.ReturnUrl = returnUrl;
        return PartialView();
    }

    [HttpPost]
    [AllowAnonymous]
    [ValidateAntiForgeryToken]
    public PartialViewResult Login(LoginModel model, string returnUrl)
    {
        if (ModelState.IsValid && WebSecurity.Login(model.Email, model.Password, persistCookie: model.RememberMe))
        {
            RedirectToLocal(returnUrl);
        }

        // If we got this far, something failed, redisplay form
        ModelState.AddModelError("", "The user name or password provided is incorrect.");
        return PartialView(model);
    }

I see correctly the 2 partial view the I GET the page LogInOrRegister.cshtml

When I submit the form, if there is validation errors in the form, the view is displayed (no layout) instead of the partial view that should be part of the LogInOrRegster

Any idea ?

Answer 1

Ok, I found te solution. By passing route parameters to the partial view form :

@using (Html.BeginForm(new { ReturnUrl = ViewBag.ReturnUrl }))

I think we change the behaviour of the child action. Only by removing the route attribute :

@using (Html.BeginForm())

The PartialView is rendered in its container. Also, we can define the POST action as ChildActionOnly, it still work:

[HttpPost]
[AllowAnonymous]
[ValidateAntiForgeryToken]
[ChildActionOnly]
public PartialViewResult Login(LoginModel model, string returnUrl)

Answer 2

因此，如果您查看https://stackoverflow.com/a/10253786/30850中的讨论，您将看到使用了ChildActionOnlyAttribute，以便可以在视图内呈现Action，但无法将其提供给浏览器。

Answer 3

If the return type is PartialViewResult ,specify the partialview name along with model in the method public PartialViewResult Login(LoginModel model, string returnUrl) otherwise use ActionResult as return type. ActionResult is an abstract class where as PartialViewResult is a subclass.