利用正则表达式将html网页数据变成Web Service[5]

            dt.columns.add( "baseline", typeof(double) );
            xmldatadocument xmldoc = new xmldatadocument( ds );

            regex expr = new regex(
                @"<tr bgcolor='#\w+' ><td height='20'>(?<currency>.*)</td>\s*" +
                @"<td height='20'><p align='right'>(?<bankbuytt>\d*.?\d*)(&nbsp)+.?</td>\s*" +
                @"<td height='20'><p align='right'>(?<buynotes>\d*.?\d*)(&nbsp)+.?</td>\s*" +
                @"<td height='20'><p align='right'>(?<sell>\d*.?\d*)(&nbsp)+.?</td>\s*" +
                @"<td height='20'><p align='right'>(?<base>\d*.?\d*)(&nbsp)+.?</td>\s*"
                , regexoptions.compiled);
            for( match m = expr.match(webcontent) ; m.success ; m=m.nextmatch() )
            {
                string key;
                datarow row = dt.newrow();
                row["currency"] = m.groups["currency"];
                key = m.groups["bankbuytt"].tostring();