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c# extract html from site with console program

Posted on 2013-11-07
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Last Modified: 2013-11-12
I'm using a c# program to extract to a string the following page:

http://signssafety.com/signsafety/ProductDescription.aspx?productID=7

and I'm using the following code:

urlItem = "http://signssafety.com/signsafety/ProductDescription.aspx?productID=7"
HttpWebRequest request = (HttpWebRequest)HttpWebRequest.Create(urlItem);
request.UserAgent = "Foo";
request.ContentType = "text/html; charset=UTF-8";
Encoding wind1252 = Encoding.GetEncoding(1252);
request.UseDefaultCredentials = true;
HttpWebResponse response = (HttpWebResponse)request.GetResponse();
                        StreamReader myStreamReader = new streamReader(response.GetResponseStream(), wind1252);
 string responseString = myStreamReader.ReadToEnd();
 request.Abort();
StreamWriter swwrite = new StreamWriter(@"Items.html");
swwrite.Write(responseString);
swwrite.Close();

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When I view the downloaded Items.html file I see that the the actual page that was downloaded was:

"http://www.signssafety.com/signsafety"

and not the page in the link above.

I want to continue using the c# console program, and don't want to use the WebBrowser object. Does anyone know what I'm doing wrong or what can be done using the C# console to download the actual page?
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Question by:esak2000
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3 Comments
 
LVL 75

Expert Comment

by:käµfm³d 👽
ID: 39630438
I would suggest using the HTML Agility Pack (available through NuGet also) if you are going to be parsing HTML. It is very flexible in terms of handling various qualities of HTML.

For your needs, you could do something like:

HtmlAgilityPack.HtmlWeb client = new HtmlAgilityPack.HtmlWeb();
HtmlAgilityPack.HtmlDocument doc = client.Load("http://signssafety.com/signsafety/ProductDescription.aspx?productID=7");

doc.Save("Items.html");

Open in new window


HAP provides both LINQ and XPath mechanisms for extracting data from HTML. Both of these would be more reliable in terms of locating data within the HTML source than would straight string searching.
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Accepted Solution

by:
esak2000 earned 0 total points
ID: 39631040
Thanks for the tip. In the end I used the internet explorer object to download the html files to my local computer and used stream reader to read the files.
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Author Closing Comment

by:esak2000
ID: 39641076
my comment was what the better solution for what I wanted
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