protected void Page_Load(object sender, EventArgs e)
        {
            Student s = (Student)Session["user"];

            if (s != null)
            {
                welcomeInfo.InnerHtml = "欢迎你," + s.Name;
                ExamResultService  ers            = new ExamResultService();
                IList <ExamResult> examResultList = ers.getExamResultByStudent(s);
                string             content        = "<center><h2>" + s.Name + " 同学成绩单</h2></center>";
                foreach (ExamResult er in examResultList)
                {
                    content += "<h4>" + er.ExamPlan.Name + "</h4>";
                    IDictionary <string, string> couresScoureMap = er.CouresScoreMap;
                    string[] keys = new string[couresScoureMap.Keys.Count];
                    content += "<table class='table table-striped table-bordered table-condensed'><thead><tr>";
                    for (int i = 0; i < keys.Length; i++)
                    {
                        String key = couresScoureMap.Keys.ElementAt(i);
                        keys[i]  = key;
                        content += "<th>" + key + "</th>";
                    }
                    content += "</tr></thead><tbody><tr>";
                    for (int i = 0; i < keys.Length; i++)
                    {
                        String key = keys[i];
                        content += "<td>" + couresScoureMap[key] + "</td>";
                    }
                    content += "</tr></tbody></table>";
                }
                TableContent.InnerHtml = content;
            }
            else
            {
                Response.Redirect("login.aspx");
            }
        }