You need to make the request asynchronously.
You can use something like this as a helper:
public static void RequestAsync(Uri url, Action callback)
{
if (callback == null)
{
throw new ArgumentNullException("callback");
}
try
{
var req = WebRequest.CreateHttp(url);
AsyncCallback getTheResponse = ar =>
{
try
{
string responseString;
var request = (HttpWebRequest)ar.AsyncState;
using (var resp = (HttpWebResponse)request.EndGetResponse(ar))
{
using (var streamResponse = resp.GetResponseStream())
{
using (var streamRead = new StreamReader(streamResponse))
{
responseString = streamRead.ReadToEnd();
}
}
}
callback(responseString, null);
}
catch (Exception ex)
{
callback(null, ex);
}
};
req.BeginGetResponse(getTheResponse, req);
}
catch (Exception ex)
{
callback(null, ex);
}
}
You can then make calls like this:
private void Button_Click(object sender, RoutedEventArgs e)
{
RequestAsync(
new Uri("
http://www.knbsb.nl/nw/index.php?option=com_content&view=category&layout=blog&id=382&Itemid=150&lang=nl&LevelID=120&CompID=1580"),
(html, exc) =>
{
if (exc == null)
{
Dispatcher.BeginInvoke(() => MessageBox.Show(html));
}
else
{
// handle exception appropriately
}
});
}
