protected string BatchRemoveStudent()
        {
            JsonData data     = new JsonData();
            string   Group_id = MyRequest.GetString("GroupID");
            string   value    = MyRequest.GetString("StudentID");
            string   msg      = "";

            if (Tools.CheckParams(Group_id + value))
            {
                msg = "传输异常,存在非法字符!";
            }
            else if (value == "")
            {
                msg = "参数异常!";
            }
            else
            {
                try
                {
                    value = Utils.DelLastComma(value);
                    string[] list = value.Split(',');
                    foreach (var tmp in list)
                    {
                        long userid  = long.Parse(tmp);
                        int  groupid = int.Parse(Group_id);
                        BLL.CCOM.Reply_student   bll   = new BLL.CCOM.Reply_student();
                        Model.CCOM.Reply_student model = bll.GetModel(" Group_id=" + groupid + " and User_id=" + userid);
                        if (msg == "")
                        {
                            if (model == null)
                            {
                                continue;
                            }
                            else
                            {
                                if (!bll.Delete(model.Rs_id))
                                {
                                    msg = "移除失败";
                                }
                            }
                        }
                    }
                }
                catch (Exception)
                {
                    msg = "移除发生异常!";
                }
            }
            if (msg == "")
            {
                data["msg"]  = "移除成功";
                data["code"] = 1;
            }
            else
            {
                data["msg"]  = msg;
                data["code"] = 0;
            }
            return(data.ToJson());
        }
        protected string RemoveStudent()
        {
            JsonData data     = new JsonData();
            string   Group_id = MyRequest.GetString("GroupID");
            string   User_id  = MyRequest.GetString("StudentID");
            string   msg      = "";

            if (Tools.CheckParams(Group_id + User_id))
            {
                msg = "传输异常,存在非法字符!";
            }
            else
            {
                try
                {
                    long userid  = long.Parse(User_id);
                    int  groupid = int.Parse(Group_id);
                    BLL.CCOM.Reply_student   bll   = new BLL.CCOM.Reply_student();
                    Model.CCOM.Reply_student model = bll.GetModel(" Group_id=" + groupid + " and User_id=" + userid);
                    if (msg == "")
                    {
                        if (model == null)
                        {
                            msg = "学生不在该答辩组中";
                        }
                        else
                        {
                            if (!bll.Delete(model.Rs_id))
                            {
                                msg = "移除失败";
                            }
                        }
                    }
                }
                catch (Exception)
                {
                    msg = "移除发生异常!";
                }
            }
            if (msg == "")
            {
                data["msg"]  = "移除成功";
                data["code"] = 1;
            }
            else
            {
                data["msg"]  = msg;
                data["code"] = 0;
            }
            return(data.ToJson());
        }
        protected string AddStudent()
        {
            JsonData data     = new JsonData();
            string   Group_id = MyRequest.GetString("GroupID");
            string   User_id  = MyRequest.GetString("StudentID");
            string   msg      = "";

            if (Tools.CheckParams(Group_id + User_id))
            {
                msg = "传输异常,存在非法字符!";
            }
            else
            {
                try
                {
                    long userid  = long.Parse(User_id);
                    long groupid = long.Parse(Group_id);

                    //判断学生是否已经选题
                    var topic_model = new BLL.CCOM.Topic_relation().GetModel(" Student_id=" + userid + " and Accept_state=1");
                    if (topic_model == null)
                    {
                        msg = "该同学尚未选择毕设题目!";
                    }

                    BLL.CCOM.Reply_student   bll   = new BLL.CCOM.Reply_student();
                    Model.CCOM.Reply_student model = bll.GetModel(" Group_id=" + groupid + " and User_id=" + userid);
                    if (msg == "")
                    {
                        if (model != null)
                        {
                            msg = "学生已在该答辩组中";
                        }
                        else
                        {
                            bool isIn           = true;
                            var  student_models = new BLL.CCOM.Reply_student().GetModelList(" User_id=" + User_id);
                            var  group_model    = new BLL.CCOM.Reply_group().GetModel(long.Parse(Group_id));
                            Model.CCOM.Reply_group other_model = null;;
                            foreach (Model.CCOM.Reply_student student_model in student_models)
                            {
                                if (new BLL.CCOM.Reply_group().GetModel(student_model.Group_id).Group_type.Equals(group_model.Group_type))
                                {
                                    isIn        = false;
                                    other_model = new BLL.CCOM.Reply_group().GetModel(student_model.Group_id);
                                    break;
                                }
                            }

                            if (isIn)
                            {
                                model          = new Model.CCOM.Reply_student();
                                model.Group_id = groupid;
                                model.User_id  = userid;
                                if (bll.Add(model) <= 0)
                                {
                                    msg = "添加失败";
                                }
                            }
                            else
                            {
                                string name = new BLL.CCOM.User_information().GetModel(userid).User_realname;
                                msg = "学生" + name + "已在" + other_model.Group_name + "答辩组中";
                            }
                        }
                    }
                }
                catch (Exception)
                {
                    msg = "添加发生异常!";
                }
            }
            if (msg == "")
            {
                data["msg"]  = "添加成功";
                data["code"] = 1;
            }
            else
            {
                data["msg"]  = msg;
                data["code"] = 0;
            }
            return(data.ToJson());
        }