public static bool DownloadContent(string url, IDownloadComplete iDownCB, object objState)
{
if (cntEvent != ConnectEvent.Idel)
{
return false;
}
SetState(ConnectEvent.DownloadWaiting);
icb = iDownCB;
state = objState;
try
{
// Create a HttpWebrequest object to the desired URL.
myHttpWebRequest = (HttpWebRequest)WebRequest.Create(url);
/**
* If you are behind a firewall and you do not have your browser proxy setup
* you need to use the following proxy creation code.
// Create a proxy object.
WebProxy myProxy = new WebProxy();
// Associate a new Uri object to the _wProxy object, using the proxy address
// selected by the user.
myProxy.Address = new Uri("http://myproxy");
// Finally, initialize the Web request object proxy property with the _wProxy
// object.
myHttpWebRequest.Proxy=myProxy;
***/
// Create an instance of the RequestState and assign the previous myHttpWebRequest
// object to its request field.
myRequestState = new RequestState();
myRequestState.request = myHttpWebRequest;
// Start the asynchronous request.
IAsyncResult result=
(IAsyncResult) myHttpWebRequest.BeginGetResponse(new AsyncCallback(RespCallback), myRequestState);
// this line implements the timeout, if there is a timeout, the callback fires and the request becomes aborted
//ThreadPool.RegisterWaitForSingleObject (result.AsyncWaitHandle, new WaitOrTimerCallback(TimeoutCallback), myHttpWebRequest, DefaultTimeout, true);
// The response came in the allowed time. The work processing will happen in the
// callback function.
// event的方式会导致PSV死锁，可能是同步方式的问题，修改为忙等待方式
//allDone.WaitOne();
// Release the HttpWebResponse resource.
//myRequestState.response.Close();
}
catch(WebException e)
{
SetState(ConnectEvent.ErrorEnding);
}
catch(Exception e)
{
SetState(ConnectEvent.ErrorEnding);
}
return true;
}
public static bool DownloadContent(string url, IDownloadComplete iDownCB, object objState)
{
if (cntEvent != ConnectEvent.Idel)
{
return(false);
}
SetState(ConnectEvent.DownloadWaiting);
icb = iDownCB;
state = objState;
try
{
// Create a HttpWebrequest object to the desired URL.
myHttpWebRequest = (HttpWebRequest)WebRequest.Create(url);
/**
* If you are behind a firewall and you do not have your browser proxy setup
* you need to use the following proxy creation code.
*
* // Create a proxy object.
* WebProxy myProxy = new WebProxy();
*
* // Associate a new Uri object to the _wProxy object, using the proxy address
* // selected by the user.
* myProxy.Address = new Uri("http://myproxy");
*
*
* // Finally, initialize the Web request object proxy property with the _wProxy
* // object.
* myHttpWebRequest.Proxy=myProxy;
***/
// Create an instance of the RequestState and assign the previous myHttpWebRequest
// object to its request field.
myRequestState = new RequestState();
myRequestState.request = myHttpWebRequest;
// Start the asynchronous request.
IAsyncResult result =
(IAsyncResult)myHttpWebRequest.BeginGetResponse(new AsyncCallback(RespCallback), myRequestState);
// this line implements the timeout, if there is a timeout, the callback fires and the request becomes aborted
//ThreadPool.RegisterWaitForSingleObject (result.AsyncWaitHandle, new WaitOrTimerCallback(TimeoutCallback), myHttpWebRequest, DefaultTimeout, true);
// The response came in the allowed time. The work processing will happen in the
// callback function.
// event的方式会导致PSV死锁，可能是同步方式的问题，修改为忙等待方式
//allDone.WaitOne();
// Release the HttpWebResponse resource.
//myRequestState.response.Close();
}
catch (WebException e)
{
SetState(ConnectEvent.ErrorEnding);
}
catch (Exception e)
{
SetState(ConnectEvent.ErrorEnding);
}
return(true);
}