public IAsyncResult BeginGetShippingRatesAsync(decimal weight, string originZipCode, string destinationZipCode, AsyncCallback callback, object state)
        {
            // create object that will store results
            AsyncResult<ShippingRate[]> asyncResult = new AsyncResult<ShippingRate[]>(callback, state);
            ShippingRatesRequest request = new ShippingRatesRequest(asyncResult, 3);

            // launch asynchronous requests, which will complete in parallel
            WebRequest fedExRequest = CreateFedExRequest(weight, originZipCode, destinationZipCode);
            fedExRequest.BeginGetResponse(ar => FedExCallback(request, fedExRequest, ar), null);

            WebRequest upsRequest = CreateUpsRequest(weight, originZipCode, destinationZipCode);
            upsRequest.BeginGetResponse(ar => UpsCallback(request, upsRequest, ar), null);

            WebRequest uspsRequest = CreateUspsRequest(weight, originZipCode, destinationZipCode);
            uspsRequest.BeginGetResponse(ar => UspsCallback(request, uspsRequest, ar), null);

            // return IAsyncResult implementation to client
            return asyncResult;
        }
Exemplo n.º 2
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 public IAsyncResult BeginGetResponse(AsyncCallback callback, object state)
 {
     AsyncResult<WebResponse> asyncResult = new AsyncResult<WebResponse>(callback, state);
     ThreadPool.QueueUserWorkItem(_ => asyncResult.Finish(GetResponse(), false));
     return asyncResult;
 }
 public ShippingRatesRequest(AsyncResult<ShippingRate[]> asyncResult, int outstandingRequests)
 {
     m_lock = new object();
     m_rates = new List<ShippingRate>();
     m_asyncResult = asyncResult;
     m_outstandingRequests = outstandingRequests;
 }
Exemplo n.º 4
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 public IAsyncResult BeginGetRequestStream(AsyncCallback callback, object state)
 {
     AsyncResult<Stream> asyncResult = new AsyncResult<Stream>(callback, state);
     ThreadPool.QueueUserWorkItem(_ => asyncResult.Finish(new MemoryStream(), false));
     return asyncResult;
 }