利用正则表达式将html网页数据变成Web Service[12]

            this.text = "foreign exchange rates of bank of china";
            ((system.componentmodel.isupportinitialize)(this.datagrid1)).endinit();
            ((system.componentmodel.isupportinitialize)(this.ds)).endinit();
            this.resumelayout(false);

        }
        #endregion

        private void btnconnect_click(object sender, system.eventargs e)
        {
            updatedatagrid();
        }
        private void updatedatagrid()
        {
            try
            {
                btnconnect.enabled = false;
                txturl.readonly = true;
                proxy.url = txturl.text;
                ds = proxy.getforeignexchangeratesdataset();
                datagrid1.setdatabinding( ds, "foreignexchange" );
                datagrid1.update();
            }
            catch( exception err )
            {