string listId = con.Get("listId");

                    var sbHtml = new StringBuilder();

                    sbHtml.Append("<table border='1' cellspacing='0' cellpadding='0'>");

                    sbHtml.Append("<tr>");

                    var lstTitle = new List<string> { "电话", "楼盘名称", "户型", "数据类型", "时间" };

                    foreach (var item in lstTitle)

                    {

                        sbHtml.AppendFormat("<td style='font-size: 14px;text-align:center;background-color: #DCE0E2; font-weight:bold;' height='25'>{0}</td>", item);

                    }

                    sbHtml.Append("</tr>");

                    HouseDLL dll = new HouseDLL();

                    List<House> list = dll.ListHouse(listId);

                    if (list.Count > 0)

                    {

                        Message msg = new Message();

                        msg.Uid = u.Uid;

                        msg.Name = u.UserName;

                        msg.Content = u.UserName + "从户型表中导出了" + list.Count + "条数据";

                        msg.PostTime = DateTime.Now;

                        db.Message.Add(msg);

                        db.SaveChanges();

                    }

    &