正则匹配代码
Regex rx = new Regex(@"(\d+).\x20target...blank.\x20{1,5}style=.LINE-HEIGHT:150%.>",
RegexOptions.Compiled | RegexOptions.IgnoreCase);
MatchCollection _oMatchColl = rx.Matches(weatherhtml);
string str = string.Empty;
foreach (Match match in _oMatchColl)
{
GroupCollection groups = match.Groups;
str = groups[1].ToString();
}