Webpage information capturing the title and link of the blog Park

This article takes the title and link of the blog home page as an example:

The DOM tree of the homepage is displayed. Obviously, you only need to extract the DIV whose class is post_item, and then extract the sign whose class is titlelnk. This function can be implemented through the following functions:

/// <Summary> /// search for all the tags whose names are tagnames and whose attributes are attrname and whose values are attrvalue. // For example: findtagbyattr (HTML, "Div", "class", "Demo ") /// return all Div labels whose classes are demo. /// </Summary> Public static list 

With the above functions, you can extract the required HTML flag. to capture, you also need a function to download the webpage:
public static String GetHtml(string url){    try    {        HttpWebRequest req = HttpWebRequest.Create(url) as HttpWebRequest;        req.Timeout = 30 * 1000;        HttpWebResponse response = req.GetResponse() as HttpWebResponse;        Stream stream = response.GetResponseStream();        MemoryStream buffer = new MemoryStream();        Byte[] temp = new Byte[4096];        int count = 0;        while ((count = stream.Read(temp, 0, 4096)) > 0)        {            buffer.Write(temp, 0, count);        }        return Encoding.GetEncoding(response.CharacterSet).GetString(buffer.GetBuffer());    }    catch    {        return String.Empty;    }}

The following describes how to use the htmltag class to capture web page information by taking the title and link of the blog homepage as an example:
Class program {static void main (string [] ARGs) {string html = htmltag. gethtml ("http://www.cnblogs.com"); List 

The running result is as follows: