Saving Data while Timer Loads

private void Tutor_Login_Load(object sender, EventArgs e)
        {
            this.Text = Login.User_Name + " (" + Login.ID + ")";
            timer1.Start();
            timer1.Enabled = true;
            timer1.Interval = 5000;

        }

 private void timer1_Tick(object sender, EventArgs e)
        {
            try
            {
                string Role = Login.Role;
                XmlNode Node;
                string Msg = string.Empty;
                int Suc;
                string tmpSuc = string.Empty;
                int tmpParam;
                string i;
                XmlNode tmpNode;
                string tmpChat = string.Empty;
                string chtdtm = "yyyy-MM-d";
                string date;
                objService.STUDENTS_ONLINE(Role, out Node, out Msg, out Suc);
                DataTable dt = new DataTable();
                dt.Columns.Add("Students_Name", typeof(string));
                dt.Columns.Add("ID", typeof(int));
                dt.Columns.Add("Status", typeof(string));
                foreach (XmlNode node in Node)
                {
                    DataRow dr = dt.NewRow();
                    dr["Students_Name"] = node["Name"].InnerText;
                    Student_Name = Convert.ToString(dr["Students_Name"]);
                    dr["ID"] = node["ID"].InnerText;
                    Student_ID = Convert.ToInt32(dr["ID"]);
                    objService.CHAT_RECEIVE_MESSAGE(Student_ID, Tutor_ID, out tmpNode, out Chatting, out date, out tmpParam, out tmpSuc);
                    DateTime today = DateTime.Today;
                    string tmpdate;
                    tmpdate = today.ToString(chtdtm);

                    if (Chatting != string.Empty)
                    {
                        if (tmpdate == date)
                        {
                            var TC = new Tutor_Chat();
                            var openedForm = Application.OpenForms[TC.tmpRName];

                            if (openedForm != null)
                            {
                                if (Student_ID != tmpSid)
                                {
                                    TC.Show();
                                }
                                else
                                {
                                    openedForm.WindowState = FormWindowState.Normal;
                                    openedForm.BringToFront();
                                    openedForm.Activate();
                                }
                            }
                            else
                            {
                                TC.Show();
                            }
                        }
                    }
                    tmpSid = Student_ID;
                    i = node["Status"].InnerText;
                    if (i == "true")
                    {
                        dr["Status"] = "online";
                    }
                    else
                    {
                        dr["Status"] = "offline";
                    }
                    dt.Rows.Add(dr);
                }
                dataGridView1.DataSource = dt;
            }

            catch (Exception ex)
            {
                throw ex;
            }

        }