asp.net – Ajax.ActionLink调用控制器两次

<td id = @tdTag>
   @Ajax.ActionLink("LL-" + item.getProjectAbbreviation(item.projectID.Value) + "-" + item.prjLessonID,"Details",new { id = item.lessonID },new AjaxOptions
                        {
                          HttpMethod = "POST",UpdateTargetId = "details",InsertionMode = InsertionMode.InsertAfter,OnSuccess = "showDetails()"

                         })

我的控制器看起来像这样…

public ActionResult Details(int id)
    {
        using (LLDataContext storeDB = new LLDataContext())
        {
            var lesson = (from l in storeDB.lessons
                          where l.lessonID == id
                          select l).SingleOrDefault();

            return PartialView(lesson);

        }
    }