private void GetGifStreamFromHttp(Uri uri)
{
try
{
WebReadState webReadState = new WebReadState();
webReadState.memoryStream = new MemoryStream();
webReadState.webRequest = WebRequest.Create(uri);
webReadState.webRequest.Timeout = 10000;
webReadState.webRequest.BeginGetResponse(new AsyncCallback(WebResponseCallback), webReadState);
}
catch (SecurityException)
{
CreateNonGifAnimationImage();
}
}
private void WebResponseCallback(IAsyncResult asyncResult)
{
WebReadState webReadState = (WebReadState)asyncResult.AsyncState;
WebResponse webResponse;
try
{
webResponse = webReadState.webRequest.EndGetResponse(asyncResult);
webReadState.readStream = webResponse.GetResponseStream();
webReadState.buffer = new byte[100000];
webReadState.readStream.BeginRead(webReadState.buffer, 0, webReadState.buffer.Length, new AsyncCallback(WebReadCallback), webReadState);
}
catch (WebException exp)
{
this.Dispatcher.Invoke(DispatcherPriority.Render, new WebRequestErrorDelegate(WebRequestError), exp);
}
}
private void WebReadCallback(IAsyncResult asyncResult)
{
WebReadState webReadState = (WebReadState)asyncResult.AsyncState;
int count = webReadState.readStream.EndRead(asyncResult);
if (count > 0)
{
webReadState.memoryStream.Write(webReadState.buffer, 0, count);
try
{
webReadState.readStream.BeginRead(webReadState.buffer, 0, webReadState.buffer.Length, new AsyncCallback(WebReadCallback), webReadState);
}
catch (WebException exp)
{
this.Dispatcher.Invoke(DispatcherPriority.Render, new WebRequestErrorDelegate(WebRequestError), exp);
}
}
else
{
this.Dispatcher.Invoke(DispatcherPriority.Render, new WebRequestFinishedDelegate(WebRequestFinished), webReadState.memoryStream);
}
}