Html.BeginForm出错

Question

我正在开发一个asp.net MVC应用程序，在渲染Html.BeginForm（）之后我遇到了一个奇怪的错误。

代码：

@using (Html.BeginForm("ValidateData", "Assurity", FormMethod.Post, new { @class = "form-horizontal" }))        
        {            
            <div class="form-group">
                @Html.LabelFor(m => m.FirstName, new { @for = "firstName", @class = "label_16 col-sm-2 control-label" })                        
                <div class="col-sm-6">
                    @Html.TextBoxFor(m => m.FirstName, new { @class = "form-control input-lg label_16", @placeholder = @Resources.PSI.FirstNamePlaceHolder })
                    @Html.ValidationMessageFor(m => m.FirstName, null, new { @class = "label_16" })
                </div>
            </div>
            <div class="form-group">
                @Html.LabelFor(m => m.Surname, new { @for = "Surname", @class = "label_16 col-sm-2 control-label" })                        
                <div class="col-sm-6">
                    @Html.TextBoxFor(m => m.Surname, new { @class = "form-control input-lg label_16", @placeholder = @Resources.PSI.SurnamePlaceHolder })
                    @Html.ValidationMessageFor(m => m.Surname, null, new { @class = "label_16" })
                </div>
            </div>
            <div class="spacer_30 clearfix hidden-xs"></div>
            <div class="spacer_10 clearfix visible-xs"></div>
            <div class="form-group">
                <div class="col-sm-offset-2 col-sm-8 text-right">
                    <button type="submit" class="btn btn-default btn-xlg btn-responsive label_18 label_900_White_shadow" >CONFIRM</button>
                </div>
            </div>
        }

它呈现一个像：

的html

<form action="/" class="form-horizontal" method="post">            <div class="form-group">
                <label class="label_16 col-sm-2 control-label" for="firstName">First Name</label>                        
                <div class="col-sm-6">
                    <input class="form-control input-lg label_16" data-val="true" data-val-required="The First Name field is required." id="FirstName" name="FirstName" placeholder="Enter here your first name" type="text" value="">
                    <span class="field-validation-valid label_16" data-valmsg-for="FirstName" data-valmsg-replace="true"></span>
                </div>
            </div>
            <div class="form-group">
                <label class="label_16 col-sm-2 control-label" for="Surname">Surname</label>                        
                <div class="col-sm-6">
                    <input class="form-control input-lg label_16" data-val="true" data-val-required="The Surname field is required." id="Surname" name="Surname" placeholder="Enter here your surname" type="text" value="">
                    <span class="field-validation-valid label_16" data-valmsg-for="Surname" data-valmsg-replace="true"></span>
                </div>
            </div>
            <div class="spacer_30 clearfix hidden-xs"></div>
            <div class="spacer_10 clearfix visible-xs"></div>
            <div class="form-group">
                <div class="col-sm-offset-2 col-sm-8 text-right">
                    <button type="submit" class="btn btn-default btn-xlg btn-responsive label_18 label_900_White_shadow">CONFIRM</button>
                </div>
            </div>
</form>

那么，为什么没有控制器和动作名称渲染表单？这段代码有什么问题？

更新：

public virtual ActionResult ValidateData()
        {
            return View(MVC.Assurity.Views.DefaultPSI, new PSIViewModel());
        }

        [HttpPost]
        [AcceptVerbs(HttpVerbs.Post)]
        public virtual async Task<ActionResult> ValidateData(PSIViewModel vm)
        {

路线：

routes.MapRoute(name: "Default", url: "{controller}/{action}/{id}", defaults:
                new
                {
                    controller = MVC.Assurity.Name,
                    action = MVC.Assurity.ActionNames.ValidateData,
                    id = UrlParameter.Optional
                });