爬天气预报的正则表达式【雏形】(来字WW.YESUR.COM)

//test Regex

string content = "";

string outHtml = "";

Regex regex;

Match mc;

StreamReader sr = new StreamReader("c:\\a.txt",System.Text.Encoding.GetEncoding("gb2312"));

content = sr.ReadToEnd();

content = content.Replace("\"","'");

//开始用正则表达式取出图片文件名

//regex = new Regex("class=\"text02\">(?<CityName>.*)</div>");

regex = new Regex(@"(\s*)<td width='105' bgcolor='F6F6F6' class='text02'>(\s*)(?<CityName>.*)(\s*)</td>(\s*)<td width='55' align='center' bgcolor='F6F6F6'>(\s*)(?<weather>.*)(\s*)</td>",RegexOptions.Compiled);

outHtml += "<table widht=100% border=1 bgcolor=d7d7d7>";

outHtml += "<tr><td colspan=10>test</td></tr>";

for (mc = regex.Match(content); mc.Success; mc = mc.NextMatch())

{

outHtml += "<tr><td>城市：</td><td>" + mc.Groups["CityName"].Value + "</td><td>" + mc.Groups["weather"].Value + "</d></tr>";

}

outHtml += "</table>";

Response.Write(outHtml);

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关键的一个地方是：

<tr><td>之间必须用(\s*)来表示，这个表示无限个空格，否则匹配不到，COOL