protected void loginButton_Click(object sender, EventArgs e)
 {
     DAL.DAO.Center centerInfo = new DAL.DAO.Center();
     if (aCenterManager.CenterInfoCheck(codeTextBox.Text, passwordTextBox.Text, out centerInfo))
     {
         Session["CenterInfoDetails"] = centerInfo;
         FormsAuthentication.RedirectFromLoginPage(codeTextBox.Text, true);
     }
     else
     {
         labelAuthentication.Text = "Invalid User Name and password";
     }
 }