protected void Button2_Click(object sender, EventArgs e)
        {
            UserDetails userInfo = new UserDetails();

            userInfo.Name       = TextBoxUserName2.Text;
            userInfo.CareCardNo = TextBoxCareCard2.Text;
            string result = null;

            result = obj2.RetrieveUserDetails(userInfo);
            //Console.WriteLine(result);
            if (result == null)
            {
                LabelMessage1.Text            = "You don't have any appointment!";
                LabelMessage1.EnableViewState = true;
                LabelMessage1.Visible         = true;
            }

            else
            {
                SqlConnection con = new SqlConnection("Data Source=radon;Initial Catalog=Clinic;Integrated Security=True");
                con.Open();
                SqlCommand cmd = new SqlCommand("select AppointmentTable.ClinicName,AppointmentTable.Time from AppointmentTable where AppointmentTable.Name = @userName and AppointmentTable.CareCardNo = @userCareCardNo", con);
                cmd.Parameters.AddWithValue("@userName", userInfo.Name);
                cmd.Parameters.AddWithValue("@userCareCardNo", userInfo.CareCardNo);

                SqlDataAdapter adapter = new SqlDataAdapter(cmd);

                DataSet ds = new DataSet();
                adapter.Fill(ds);
                this.GridView1.DataSource = ds.Tables[0];
                this.GridView1.DataBind();
                this.GridView1.EnableViewState = true;
                this.GridView1.Visible         = true;
                con.Close();


                LabelMessage2.Text            = "Details of your Appointment on " + result + " are as follows";
                LabelMessage2.EnableViewState = true;
                LabelMessage2.Visible         = true;
            }
        }