private string GetInvoiceClient()
        {
            if (m_isUpdate)
            {
                Facade.IInvoiceExtra facInvoiceExtra = new Facade.Invoice();
                DataSet dsClient = facInvoiceExtra.GetClientForInvoiceExtraId(Convert.ToInt32(ViewState["InvoiceId"]));

                m_identityId            = Convert.ToInt32(dsClient.Tables[0].Rows[0]["IdentityId"]);
                ViewState["IdentityId"] = m_identityId;

                return(dsClient.Tables[0].Rows[0]["OrganisationName"].ToString());
            }
            else
            {
                Facade.IOrganisation facOrganisation = new Facade.Organisation();
                return(facOrganisation.GetNameForIdentityId(m_identityId));
            }
        }