protected void BindTelephoneNo()
 {
     try
     {
         DataTable dtPhoneNumber = TMSTelephoneDetails.GetSearch(null, ddlType.SelectedValue, null, null, 1).Tables[0];
         if (dtPhoneNumber.Rows.Count > 0)
         {
             ddlPhone.DataSource     = dtPhoneNumber;
             ddlPhone.DataTextField  = "TD_TelephoneNumber";
             ddlPhone.DataValueField = "TD_TelephoneId";
             ddlPhone.DataBind();
         }
         else
         {
             ddlPhone.Items.Clear();
             ddlPhone.Items.Insert(0, new ListItem("Select", "-1"));
         }
     }
     catch (Exception ex) { }
 }