Javascript 是否正在html.textboxfor（）中获取值？

我的aspx中有这个：

 <div class="col2-input" id="Launch-Height-value">
  <input type="hidden" name="Launch-Height" id="Launch-Height" value="<%: Model.LaunchHeight %>" />
  <%:  Html.TextBoxFor(model => model.LaunchHeight) %>
</div>
<div class="col3">
  <div id="save-launch-height">
    <a href="javascript:saveLaunchHeight();" class="button">Save</a>
  </div>
</div>

在视图中，我可以更改宽度值并单击保存，它会更新html.textboxfor，但仅此而已

然后httpget进入控制器

 [HttpGet]
[NoCache]
public JsonResult UpdateLaunchWidth(int scormModuleId, short value)
{
    if (value > 0)
    {
        var module = ZincService.ScormService.GetScormModule(scormModuleId);
        if (module != null)
        {
            try
            {
                module.LaunchWidth = value;
                ZincService.ScormService.UpdateScormModuleSettings(module);
                ZincService.SaveChanges();
                return Json(new { success = true }, JsonRequestBehavior.AllowGet);
            }
            catch (Exception ex)
            {
                Logger.Error(ex, "Error setting new value for LaunchWidth property for scorm module with Id " + scormModuleId);
                return Json(new { success = false }, JsonRequestBehavior.AllowGet);
            }
        }
        else
            return Json(new { success = false }, JsonRequestBehavior.AllowGet);
    }
    else
        return Json(new { success = false }, JsonRequestBehavior.AllowGet);
} 

这不会保存我的新值。我没有写这段代码，所以不能对它的工作原理做太多的改变。。如果我能在html.textboxfor中得到值。。。 请帮忙

---

谢谢

不用太担心，我整理好了谢谢

  function updateSaveButtons() {
  if ($("#LaunchWidth").val() != $("#PassScoreHidden").val())
      $("#save-pass-score-button").show();
   }

 [HttpGet]
[NoCache]
public JsonResult UpdateLaunchWidth(int scormModuleId, short value)
{
    if (value > 0)
    {
        var module = ZincService.ScormService.GetScormModule(scormModuleId);
        if (module != null)
        {
            try
            {
                module.LaunchWidth = value;
                ZincService.ScormService.UpdateScormModuleSettings(module);
                ZincService.SaveChanges();
                return Json(new { success = true }, JsonRequestBehavior.AllowGet);
            }
            catch (Exception ex)
            {
                Logger.Error(ex, "Error setting new value for LaunchWidth property for scorm module with Id " + scormModuleId);
                return Json(new { success = false }, JsonRequestBehavior.AllowGet);
            }
        }
        else
            return Json(new { success = false }, JsonRequestBehavior.AllowGet);
    }
    else
        return Json(new { success = false }, JsonRequestBehavior.AllowGet);
}