Loading Html page and modifying a section - asp.net

Question

I need to load an external web (not local) page into my site (some link), but only a part of it.
What are the options for doing so?

Answer 1

That depends on whether or not the external page is local, or on a different domain. If it's local, you can use $.load() in the jQuery library. This has an optional parameter to specify which element in the remote-dom to load it:
$("#links").load("/Main_Page #jq-p-Getting-Started li");
If the page is on another domain, you'll need a proxy script. You can do this with PHP and the phpQuery (php port of jQuery) library. You'll just use file_get_contents() to get the actual remote-dom, and then pull out the elements you want based on jQuery-like selectors.

Answer 2

$f = fopen('http://www.quran.az/2/255', 'r');
and so on...

Answer 3

Once you get the whole page as Michael Todd outlined, you will likely need to either use substring methods for a static means to slice up the content or you can use regex's for a more dynamic way to grab the content. An intro article on Regex's in ASP.Net can be found here. Good luck!

Answer 4

To load a web page in .Net, use the HttpWebRequest class.
Example taken from MSDN, here:
private string StringGetWebPage(String uri)
{
const int bufSizeMax = 65536; // max read buffer size conserves memory
const int bufSizeMin = 8192; // min size prevents numerous small reads
StringBuilder sb;
// A WebException is thrown if HTTP request fails
try
{
// Create an HttpWebRequest using WebRequest.Create (see .NET docs)!
HttpWebRequest request = (HttpWebRequest)WebRequest.Create(uri);
// Execute the request and obtain the response stream
HttpWebResponse response = (HttpWebResponse)request.GetResponse();
Stream responseStream = response.GetResponseStream();
// Content-Length header is not trustable, but makes a good hint.
// Responses longer than int size will throw an exception here!
int length = (int)response.ContentLength;
// Use Content-Length if between bufSizeMax and bufSizeMin
int bufSize = bufSizeMin;
if (length > bufSize)
bufSize = length > bufSizeMax ? bufSizeMax : length;
// Allocate buffer and StringBuilder for reading response
byte[] buf = new byte[bufSize];
sb = new StringBuilder(bufSize);
// Read response stream until end
while ((length = responseStream.Read(buf, 0, buf.Length)) != 0)
sb.Append(Encoding.UTF8.GetString(buf, 0, length));
}
catch (Exception ex)
{
sb = new StringBuilder(ex.Message);
}
return sb.ToString();
}
Note that this will return the entire page and not just a portion of it. You'll then need to sift through the page to find the information you're looking for.