Parsing Html Table in Web Pages using C#

Step 1: download and add reference of Html Agility Pack to your project
Download Html Agility Pack from the following link:

http://htmlagilitypack.codeplex.com/

Add a reference of the library to your project

Step 2: download the html web page to parse

Use the following code to download the web page.



Step 3: Parse the downloaded web page for the html table using Html Agility Pack

private void Download(string url)
{
    WebClient client = new WebClient();

    client.DownloadFileCompleted +=    new AsyncCompletedEventHandler(client_DownloadFileCompleted);

    client.DownloadFileAsync(new Uri(url), @"c:\temp.html");
 }

void client_DownloadFileCompleted(object sender, AsyncCompletedEventArgs e)
{
    //do something here
}

Use the following code in the client_DownloadFileCompleted() to enumerate all links in the web page.

void client_DownloadFileCompleted(object sender, AsyncCompletedEventArgs e)
{
 string address="";
 foreach (HtmlNode table in doc.DocumentNode.SelectNodes("//table"))
 {
  //Console.WriteLine("Found: " + table.Id);
  HtmlNodeCollection hnc=table.SelectNodes("tr");
  if(hnc != null)
  {
   foreach (HtmlNode row in hnc)
   {
    bool address_found=false;
    bool address_stored=true;
    foreach (HtmlNode cell in row.SelectNodes("td"))
    {
     // get address
     if (cell.InnerText.Contains("详细地址") && !cell.InnerText.Contains(""))
     {
      address_found = true;
      address_stored = false;
     }
     else if (address_found && address_stored == false)
     {
      address = cell.InnerText.Trim();
      address_stored = true;
     }
     
    }
   }
  }
 }

 Console.WriteLine("Found Address in Web Page: {0}", address);
}