public static bool CallUrl(string url, DownloadStringCompletedEventHandler handler, TimeoutContext tc)
{
WebClient wc = new WebClient();
// wc.Headers[HttpRequestHeader.IfModifiedSince] = DateTime.UtcNow.ToString(CultureInfo.InvariantCulture);
if (handler != null)
{
wc.DownloadStringCompleted += handler;
}
Uri uri = null;
try
{
uri = new Uri(url);
}
catch (FormatException)
{
return(false);
}
wc.DownloadStringAsync(uri, tc);
if (tc != null)
{
wc.DownloadProgressChanged += tc.wc_DownloadProgressChanged;
tc.Tag = wc;
ThreadPool.QueueUserWorkItem(
(obj) =>
{
TimeoutContext timeContext = obj as TimeoutContext;
if (timeContext == null)
{
return;
}
WebClient wcInProgress = timeContext.Tag as WebClient;
if (wcInProgress == null)
{
return;
}
Thread.Sleep(timeContext.Timeout);
if (timeContext.Connected == true)
{
return;
}
if (timeContext.Completed == false)
{
wcInProgress.CancelAsync();
}
}, tc);
}
return(true);
}
public static bool CallUrl(string url, DownloadStringCompletedEventHandler handler, TimeoutContext tc)
{
WebClient wc = new WebClient();
// wc.Headers[HttpRequestHeader.IfModifiedSince] = DateTime.UtcNow.ToString(CultureInfo.InvariantCulture);
if (handler != null)
{
wc.DownloadStringCompleted += handler;
}
Uri uri = null;
try
{
uri = new Uri(url);
}
catch (FormatException)
{
return false;
}
wc.DownloadStringAsync(uri, tc);
if (tc != null)
{
wc.DownloadProgressChanged += tc.wc_DownloadProgressChanged;
tc.Tag = wc;
ThreadPool.QueueUserWorkItem(
(obj) =>
{
TimeoutContext timeContext = obj as TimeoutContext;
if (timeContext == null)
{
return;
}
WebClient wcInProgress = timeContext.Tag as WebClient;
if (wcInProgress == null)
{
return;
}
Thread.Sleep(timeContext.Timeout);
if (timeContext.Connected == true)
{
return;
}
if (timeContext.Completed == false)
{
wcInProgress.CancelAsync();
}
}, tc);
}
return true;
}
void btnConnect_Click(object sender, EventArgs e)
{
string url = string.Format("http://{0}:{1}/getSnapshot", txtIP.Text, txtPort.Text);
TimeoutContext tc = new TimeoutContext();
tc.Timeout = 5000;
if (App.CallUrl(url, SnapshotCompleted, tc) == true)
{
EnableControls(false);
}
}
private void btnConnectClicked(object sender, RoutedEventArgs e)
{
string url = string.Format("http://{0}:{1}/getSnapshot", this.Application.IPSelected, this.Application.Port);
TimeoutContext tc = new TimeoutContext();
tc.Timeout = 5000;
if (App.CallUrl(url, SnapshotCompleted, tc) == true)
{
EnableControls(false);
}
}
void btnConnect_Click(object sender, EventArgs e)
{
string url = string.Format("http://{0}:{1}/getSnapshot", txtIP.Text, txtPort.Text);
TimeoutContext tc = new TimeoutContext();
tc.Timeout = 5000;
if (App.CallUrl(url, SnapshotCompleted, tc) == true)
{
EnableControls(false);
}
}
private void btnConnectClicked(object sender, RoutedEventArgs e)
{
string url = string.Format("http://{0}:{1}/getSnapshot", this.Application.IPSelected, this.Application.Port);
TimeoutContext tc = new TimeoutContext();
tc.Timeout = 5000;
if (App.CallUrl(url, SnapshotCompleted, tc) == true)
{
EnableControls(false);
}
}