CODEWITHSUNDEEP
c#asp.nethttpwebresponsestreamreaderweb-scraping
Dale Marshall
Dale Marshall

Reputation: 1135

Problem pulling data from website in .NET and C#

I have written a web scraping program to go to a list of pages and write all the html to a file. The problem is that when I pull a block of text some of the characters get written as '�'. How do I pull those characters into my text file? Here is my code:

string baseUri = String.Format("http://www.rogersmushrooms.com/gallery/loadimage.asp?did={0}&blockName={1}", id.ToString(), name.Trim());

// our third request is for the actual webpage after the login.
HttpWebRequest request =
(HttpWebRequest)WebRequest.Create(baseUri);
request.Method = "GET";
request.UserAgent = "Mozilla/4.0 (compatible; MSIE 8.0; Windows NT 6.1)";
//get the response object, so that we may get the session cookie.
HttpWebResponse response = (HttpWebResponse)request.GetResponse();
StreamReader reader = new StreamReader(response.GetResponseStream());

// and read the response
string page = reader.ReadToEnd();

StreamWriter SW;
string filename = string.Format("{0}.txt", id.ToString());
SW = File.AppendText("C:\\Share\\" + filename);

SW.Write(page);

reader.Close();
response.Close();

Upvotes: 2

Views: 704

Answers (3)

Gregoire
Gregoire

Reputation: 24832

You need to specify your encoding in this line:

StreamReader reader = new StreamReader(response.GetResponseStream());

and

File.AppendText("C:\\Share\\" + filename); uses UTF-8

Upvotes: 1

Antony
Antony

Reputation: 1461

Specify Unicode encoding, like so:

New StreamReader(response.GetResponseStream(), Text.Encoding.UTF8)

..same for the StreamWriter

Upvotes: 0

Joel Coehoorn
Joel Coehoorn

Reputation: 415881

You're saving a page named loadimage to a text file. Are you sure that's really all text?

Either way, you can save yourself a lot of code by using System.Net.WebClient.DownloadFile().

Upvotes: 2

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