MVC Post Action方法没有触发

我目前正在研究插入 MVC 5 应用程序的记录功能。由于某种原因，post action 方法不会触发。我在 View 上创建了一个按钮，应该触发 post action 方法。不知道为什么它不开火。表单元素在局部视图中，按钮控件不是承载局部视图的主视图。

这是代码

主视图

@model CC.GRP.MCRequest.ViewModels.NewRequestViewModel


<div class="newrequest">
    @Html.Partial("~/Views/Request/RequestHeaderView.cshtml");
</div>


<div id="buttonalign" class="buttonalign" >
     <button type="button" class="btn btn-primary">Submit</button>
     <button type="button" class="btn btn-default" onclick="location.href='@Url.Action("Request_Insert", "Request")'" >Save as draft</button>

 </div>

请求头视图

@model CC.GRP.MCRequest.ViewModels.NewRequestViewModel
    @using (Html.BeginForm())
    {

    <div id="NewRequest">
        <div class="row">
            <div class="col-md-4">
                <div class="form-group">
                    @Html.LabelFor(model => model.RequestID, htmlAttributes: new { @class = "control-label col-md-4" })
                    <div class="col-md-6">
                        <div class="editor-field">
                            @Html.EditorFor(model => model.RequestID, new { htmlAttributes = new { @class = "form-control", style = "width:100%", @readonly = "readonly" } })

                        </div>
                        @Html.ValidationMessageFor(model => model.RequestID, "", new { @class = "text-danger" })
                    </div>
                </div>
                <div class="clearfix"></div>
                <div class="form-group">

                    @Html.LabelFor(model => model.Name1, htmlAttributes: new { @class = "control-label col-md-4" })

                    <div class="col-md-6">
                        <div class="editor-field">
                            @(Html.Kendo().ComboBoxFor(model => model.Name1)

                 .HtmlAttributes(new { style = "width:100%" })
                .DataTextField("Name1")
                .DataValueField("CustomerMasterDataId")

                .DataSource(dataSource => dataSource
                .Read(read => read.Action("RequestHeader_CustomerData", "Request").Type(HttpVerbs.Post))
                )
                  .Events(e =>
                  {
                      e.Change("onCustomerComboChange");
                  })
                            )
                        </div>
                        @Html.ValidationMessageFor(model => model.CustomerNumber, "", new { @class = "text-danger" })
                    </div>
                </div>
                <div class="clearfix"></div>
                <div class="form-group">
                    @Html.LabelFor(model => model.CustomerNumber, htmlAttributes: new { @class = "control-label col-md-4" })
                    <div class="col-md-6">
                        <div class="editor-field">
                            @Html.EditorFor(model => model.CustomerNumber, new { htmlAttributes = new { @class = "form-control", style = "width:100%", @readonly = "readonly" } })

                        </div>
                        @Html.ValidationMessageFor(model => model.CustomerNumber, "", new { @class = "text-danger" })
                    </div>
                </div>
          </div>
        </div>

请求控制器

   [HttpPost]
        public ActionResult Request_Insert(NewRequestViewModel userVM)
        {
            NewRequestViewModel newReqeustViewModel = new NewRequestViewModel();
            if (!ModelState.IsValid)
            {
                return null;
            }
            requestRepository.CreateRequest(Mapper.Map<Request>(userVM));
            //return Json(requestRepository.CreateRequest(userVM));
            return View("NewRequestView", newReqeustViewModel);
        }