利用正则表达式将html网页数据变成Web Service

{

string webcontent = getWebContent("http://www.bank-of-china.com/info/whjrpj.html");

// Prepair for DataSet

DataSet ds = new DataSet("Exchange");

DataTable dt = new DataTable("ForeignExchange");

ds.Tables.Add( dt );

dt.Columns.Add( "Currency", typeof(string) );

dt.Columns.Add( "BankBuyTT", typeof(double) );

dt.Columns.Add( "BankBuyNotes", typeof(double) );

dt.Columns.Add( "BankSell", typeof(double) );

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*" +