WebClient - problem reading from web page

Question

Hi, I build winform which try to read data/string from webpage. In the following code I get no string in variable reply. however if I am using the comment url ("http://www.finviz.com/") I get string in the reply. Can you help to see why I am not getting data in this code? Thanks Shlomi private void button34_Click_1(object sender, EventArgs e) { WebClient web1 = new WebClient(); string url; url = "http://www.finviz.com/screener.ashx?v=110&s=ta_topgainers&o=-price"; // This is not working //url = "http://www.finviz.com/"; // This is working WebClient client = new WebClient(); string reply = client.DownloadString(url); }

shlomi gadol · Answer

Hi, I did captures of the two codes: one with your header insertion and one without and compare the reply so by few changes in the time, the data is the same of the stocks and the information is from the web www.finviz.com and not from the screener. Maybe the finviz is blocking when I want infromation from their page: http://www.finviz.com/ screener.ashx Thanks Shlomi

shlomi gadol · Answer

Hi, I have tried, I get in the replay like I get from what you see in finviz.com site, I have attached what I got from your code in the reply string your code provide the same as like this: url = "http://www.finviz.com/"; // This is working WebClient client = new WebClient(); string reply = client.DownloadString(url); any ideas? thanks shlomi

Abrar Ahmad Ansari · Answer

I have tested it's working.. try below code to online ide. http://rextester.com/runcode using System; using System.Net; namespace Rextester { public class Program { public static void Main(string[] args) { //Your code goes here WebClient client = new WebClient(); string url = "http://www.finviz.com"; client.Headers.Add("v", "110"); client.Headers.Add("s", "ta_topgainers"); client.Headers.Add("o", "-price"); string reply = client.DownloadString(url); Console.WriteLine(reply); } } }

shlomi gadol · Answer

Hi, Thanks for your responding. I tried. I actually get the information with the same behave of url = www.finviz.com --> mean it doesn't work For you is it working? Thanks Shlomi

Abrar Ahmad Ansari · Answer

try this... WebClient client = new WebClient(); string url = "http://www.finviz.com"; client.Headers.Add("v", "110"); client.Headers.Add("s", "ta_topgainers"); client.Headers.Add("o", "-price"); string reply = client.DownloadString(url);