You can imagine a use case where you have 100s or 1000s of URLs that you want to check. For me it is 700+ image files, but it could be FAQs, product landing pages, or any other case where the URLs can be generated from a database query or file system script.

What I did was put all of my URLs into a text file (MyLinks.txt). It looks like this:

http://foo.org/foo/Images/Normal/1598_1_CR.jpg
http://foo.org/foo//Images/Normal/2.jpg
http://foo.org/foo/Images/Normal/31796.2001.jpg
http://foo.org/foo/Images/Normal/4.2001.jpg
etc….

I built a console app that goes through each URL in the file then check it with the code in this blog. The entire thing is below. I am amazed that I couldn’t find an example of this and I was going to make a CodeProject articlee out of it, but it seems more appropriate to put it here. Thanks again.

Steve

PS, One thing that is really important to do is add “response.Close()” which I did below. It is also a good idea to put in a request.Timeout value.

using System;
using System.Net;
using System.IO;

namespace LinkChecker
{
class Program
{
static void Main(string[] args)
{

string[] m_urls = File.ReadAllLines(@”C:\LinkChecker\MyLinks.txt”);

//string[] m_urls = new string[] { m_arraystring.ToString() };

StreamWriter m_results = new StreamWriter(@”C:\LinkChecker\LinkCheckerResults.txt”, true);

// Print length of each row
for (int i = 0; i < m_urls.Length; i++)
{
Console.WriteLine("Status of URL " + m_urls[i].ToString() + " is " + RemoteFileExists(m_urls[i]));
m_results.WriteLine("Status of URL " + m_urls[i].ToString() + " is " + RemoteFileExists(m_urls[i]));
m_results.Flush();
}

}

///
/// Checks the file exists or not.
///
/// The URL of the remote file.
/// True : If the file exits, False if file not exists
public static bool RemoteFileExists(string url)
{
try
{
//Creating the HttpWebRequest
HttpWebRequest request = WebRequest.Create(url) as HttpWebRequest;
//Setting the Request method HEAD, you can also use GET too.
request.Method = "HEAD";
request.Timeout = 10000;
//Getting the Web Response.
HttpWebResponse response = request.GetResponse() as HttpWebResponse;
response.Close();
//Returns TURE if the Status code == 200
return (response.StatusCode == HttpStatusCode.OK);

}
catch
{
//Any exception will returns false.
return false;
}
}

}