将值从一个视图传递给它自己,参数得到空值?

我正试图从下面代码的视图中获取值,并从“视图输入”文本框中获取开始日期值并将其发回,但除了apikey和userkey之外,仍将获得空值。以下是两个视图。

public ActionResult View1(string apiKey, string userId)
        {
            StartGoalViewModel vm = new StartGoalViewModel();//this is a custom model..
            vm.ApiKey = apiKey;
            vm.UserId = userId;
            vm.GoalTypeId =1;
            vm.StartDate = null;
            return View(vm);
        }
VIEW1.ASPX
<% Html.BeginForm(); %>
<%= Html.TextBox("name", Model.StartDate) %>
    <input type="submit" value="Start" />
 <% Html.EndForm(); %>
[HttpPost]
        public ActionResult VIEW1 (StartGoalViewModel fm)
        {
         // I  get fm.StartDate and fmGoaltypeId null...
         //  fm.aspikey and fm.userid have values
     }