如果在MVC Core 3.1中使用asp-for属性，则在POST之后未设置该值

我有简单的视图模型：

public class GogViewModel
{
  [Required]
  public string Name { get; set; }

  public bool IsBeta { get; set; }

  public string Result { get; set; }
}

和控制器：

[HttpGet]
public IActionResult Index()
{
  return View(new GogViewModel());
}

[HttpPost]
[ValidateAntiForgeryToken]
public IActionResult Index(GogViewModel model)
{
  if (ModelState.IsValid)
  {
    model.Result = DoSomething();
  }

  return View(model);
}

和视图：

@model GogViewModel
<div>
  <form method="post">
    @Html.AntiForgeryToken()

    <div class="form-group row">
      <label class="col-sm-2 col-form-label" asp-for="Name">Release name</label>
      <div class="col-sm-10">
        <input type="text" class="form-control" asp-for="Name" placeholder="paste release name here" />
      </div>
    </div>
    <div class="form-group row">
      <label class="col-sm-2 col-form-label" asp-for="Result">Result</label>
      <div class="col-sm-9">
        <input type="text" class="form-control-plaintext" readonly="readonly" asp-for="Result" />
         <p>@Model.Result</p> <!-- it works here means the value is printed -->
      </div>
      <div class="col-sm-1">
        <button type="button" class="btn btn-outline-info copy float-right" data-target="Result"><i class="far fa-copy"></i></button>
      </div>
      <div class="clearfix"></div>
    </div>
    <input type="submit" class="btn btn-success" value="Fix it" />
  </form>
</div>

POST请求后不以某种方式输出结果。

为什么呢 我的错在哪里？