MVC ViewModel没有被发送回控制器

Question

我见过这个问题的多个实例。尽管如此，我仍然无法弄清楚这个post方法没有将模型传回控制器的问题。我已经查看了传递给控制器​​的模型之间的命名约定，以及如果我删除它们是否传入了只读字段。除此之外，它可能是BindAttribute，将多选的RoleIds绑定到模型。

这是我的代码：

模特：

 public class UserDetail
{
    public Guid Id { get; set; }
    public List<string> RoleIds { get; set; }
    public string DomainName { get; set; }

    public string Name { get; set; }
    public string FirstName { get; set; }
    public string LastName { get; set; }
    public string UserName { get; set; }
    public string EmailAddress { get; set; }
    public string PhysicalDeliveryOfficeName { get; set; }
    public string TenantDisplayId { get; set; }
    public Boolean InitPassword { get; set; }
    public Boolean Active { get; set; }
    public Boolean SystemAdmin { get; set; }
    public ICollection<RoleDetail> Roles { get; set; }
    public IEnumerable<SelectedRoles> SelectedRoles { get; set; }
    public MultiSelectList RoleOptions { get; set; }


    public UserDetail()
    {
        Id = Id;
        RoleIds = RoleIds;
        FirstName = FirstName;
        LastName = LastName;
        Name = Name;
        Active = Active;
        EmailAddress = EmailAddress;
        SystemAdmin = SystemAdmin;
    }
}

cshtml：

@model IzendaEmbedded.Models.UserDetail



 @using (Html.BeginForm("EditActiveDirectoryUser","ActiveDirectory", 
 FormMethod.Post, new {userDetail = Model}))
{
@Html.AntiForgeryToken()

<div class="form-horizontal">
    <nav aria-label="breadcrumb">
        <ol class="breadcrumb" style="height: 100px; padding-top: 20px; padding-left: 140px; background-color: #FFFFFF">
            <li class="breadcrumb-item" style="font-family: arial; font-size:40px"><a href=@Url.Action("Index", "Home")>Izenda</a></li>
            <li class="breadcrumb-item active" aria-current="page" style="font-family: arial; font-size:40px"><a href=@Url.Action("Parse", "ActiveDirectory")>Active Directory</a></li>
            <li class="breadcrumb-item active" aria-current="page" style="font-family: arial; font-size:40px">Edit Izenda User</li>
        </ol>
    </nav>

    <hr />
    @Html.ValidationSummary(true, "", new { @class = "text-danger" })

    <div class="form-group">
        @Html.LabelFor(model => model.Name, htmlAttributes: new { @class = "control-label col-md-2" })
        <div class="col-md-4">
            @Html.EditorFor(model => model.Name, new { htmlAttributes = new { @class = "form-control", @readonly = "readonly" } })
            @Html.ValidationMessageFor(model => model.Name, "", new { @class = "text-danger" })
        </div>
    </div>

    <div class="form-group">
        @Html.LabelFor(model => model.UserName, "Account Name", htmlAttributes: new { @class = "control-label col-md-2" })
        <div class="col-md-4">
            @Html.EditorFor(model => model.UserName, new { htmlAttributes = new { @class = "form-control", @readonly = "readonly" } })
            @Html.ValidationMessageFor(model => model.UserName, "", new { @class = "text-danger" })
        </div>
    </div>

    <div class="form-group">
        @Html.LabelFor(model => model.FirstName, "First Name", htmlAttributes: new { @class = "control-label col-md-2" })
        <div class="col-md-4">
            @Html.EditorFor(model => model.FirstName, new { htmlAttributes = new { @class = "form-control", @readonly = "readonly" } })
            @Html.ValidationMessageFor(model => model.FirstName, "", new { @class = "text-danger" })
        </div>
    </div>

    <div class="form-group">
        @Html.LabelFor(model => model.LastName, "Last Name", htmlAttributes: new { @class = "control-label col-md-2" })
        <div class="col-md-4">
            @Html.EditorFor(model => model.LastName, new { htmlAttributes = new { @class = "form-control", @readonly = "readonly" } })
            @Html.ValidationMessageFor(model => model.LastName, "", new { @class = "text-danger" })
        </div>
    </div>

    <div class="form-group">
        @Html.LabelFor(model => model.EmailAddress, "Email Address", htmlAttributes: new { @class = "control-label col-md-2" })
        <div class="col-md-4">
            @Html.EditorFor(model => model.EmailAddress, new { htmlAttributes = new { @class = "form-control", @readonly = "readonly" } })
            @Html.ValidationMessageFor(model => model.EmailAddress, "", new { @class = "text-danger" })
        </div>
    </div>

    <div class="form-group">
        @Html.LabelFor(model => model.Roles, htmlAttributes: new { @class = "control-label col-md-2" })
        <div class="col-md-4">
            @Html.ListBoxFor(model => model.RoleIds, Model.RoleOptions, new {@class = "form-control"})
        </div>
    </div>

    <div class="form-group">
        @Html.LabelFor(model => model.Active, htmlAttributes: new { @class = "control-label col-md-2" })
        <div class="col-md-4">
            <div class="checkbox">
                @Html.EditorFor(model => model.Active)
                @Html.ValidationMessageFor(model => model.Active, "", new { @class = "text-danger" })
            </div>
        </div>
    </div>

    <div class="form-group">
        <div class="col-md-offset-2 col-md-4">
            <input type="submit" value="Save" class="btn btn-default" />
        </div>
    </div>
</div>
}

控制器发布方法：

 [HttpPost]
    public async Task<ActionResult> EditActiveDirectoryUser([Bind(Include = 
    "Id, Name, RoleIds")] UserDetail userDetail)
    {

    //save logic 
    }