jquery - 错误状态: 'Internal Server Error' .错误代码:MVC4 JQgrid编辑和删除中的500

Question

嗨，我开始在 JQgrid 上工作，它对于添加、搜索等都工作得很好，但是当我删除记录时，它会获取我的错误，正如我的帖子所说。它没有进入删除和编辑 Controller 操作本身，我通过在其中放置断点进行检查。我的代码看起来像看法{

  <table id="jQGridDemo">
    </table>
    <div id="jQGridDemoPager">
    </div>
    <script type="text/javascript">
          jQuery("#jQGridDemo").jqGrid({
              url: 'RTGUser/GetUserDetails',
              datatype: "json",
              colNames: ['Id', 'Name', 'Designation', 'City'],
              colModel: [
             { name: 'Id', index: 'Id', width: 40, align:'center', sortable: true, editable:false},
              { name: 'Name', index: 'Name', width: 40, align: 'center', sortable: true, editable: true, edittype: 'text', editrules: { required: true} },
              { name: 'Designation', index: 'Designation', width: 400, align: 'center', sortable: true, editable: true, edittype: 'text', editrules: { required: true} },
              { name: 'City', index: 'City', width: 150, align: 'center', sortable: true, editable: true, edittype: 'text', editrules: { required: true} }
              ],

            mtype: 'POST',
            loadonce: true,
            rowList: [5,10, 20, 30],
            pager: '#jQGridDemoPager',
            sortname: 'Id',
            viewrecords: true,
            sortorder: 'desc',
            caption: "List Of Users"

        });

        jQuery("#jQGridDemo").jqGrid('navGrid', '#jQGridDemoPager',
      { edit: true, add: true, del: true, search:true },
           { url: "/RTGUser/EditUser", closeAfterEdit: true, beforeShowForm: function (formid) { $("#Id", formid).hide(); } },
           { url: "/RTGUser/AddNewUser", closeAfterAdd: true, beforeShowForm: function (formid) { $("#Id", formid).hide(); } },
           { url: "/RTGUser/DeleteUser" }, {});

        $("#search").filterGrid("#grid", {
            gridModel: false,
            filterModel: [{
                label: 'Search',
                name: 'search',
                stype: 'text'
            }]
        });

    </script>
</body>

}

我的 Controller 看起来像{

   public ActionResult EditUser(int userId, string name, string desig, string city)
        {
            try
            {
                var query = from u in db.Users
                            where u.Id.Equals(userId)
                            select u;

                var user = query.First();
                user.Name = name;
                user.Designation = desig;
                user.City = city;
                db.SaveChanges();

                return Json(true);
            }
            catch (Exception)
            {
                // Do some error logging stuff, handle exception, etc.
                return Json(false);
            }
        }

  public ActionResult DeleteUser(int userId)
        {
            try
            {
                var query = from u in db.Users
                            where u.Id.Equals(userId)
                            select u;

              //  var user = query.First();
                var usr = db.Users.Find(Convert.ToInt32(userId));
                db.Users.Remove(usr);
                db.SaveChanges();

                return Json(true);
            }
            catch (Exception e)
            {
                // Do some error logging stuff, handle exception, etc.
                Response.Write(e);
                return Json(false);
            }
}

} 请建议我解决这个问题的方法。

Answer 1

使用 Firefox/Firebug 或 IE8 开发人员工具查看从服务器获得的实际响应。它落在哪条线上？一旦你发现了，你可能就会发现你的错误。