private void Submit()
    {
        AjaxResult result = new AjaxResult();

        result.IsSuccess = false;
        result.Msg       = "提交失败!";
        var id = Request.Form["id"] != null?Convert.ToInt32(Request.Form["id"]) : 0;

        if (bll.Submit(id, User.ID, User.UserName))
        {
            result.IsSuccess = true;
            result.Msg       = "提交成功!";
        }
        Response.Clear();
        Response.Write(result.ToJsonString());
        Response.ContentType = "application/json";
        Response.End();
    }