//private void DownloadBlobWorker(MyAsyncContext asyncContext, out bool cancelled, AsyncOperation async)
//{
// cancelled = false;
// ParallelDownloadFile(asyncContext, async);
// // check for Cancelling
// if (asyncContext.IsCancelling)
// {
// cancelled = true;
// }
//}
private void TaskCompletedCallback(IAsyncResult ar)
{
// get the original worker delegate and the AsyncOperation instance
BlobTransferWorkerDelegate worker = (BlobTransferWorkerDelegate)((AsyncResult)ar).AsyncDelegate;
AsyncOperation async = (AsyncOperation)ar.AsyncState;
bool cancelled;
// finish the asynchronous operation
worker.EndInvoke(out cancelled, ar);
// clear the running task flag
lock (_sync)
{
TaskIsRunning = false;
TaskContext = null;
}
// raise the completed event
var asyncOperation = ar.AsyncState as AsyncOperation;
object userState = null;
if (asyncOperation != null)
{
userState = asyncOperation.UserSuppliedState;
}
AsyncCompletedEventArgs completedArgs = new AsyncCompletedEventArgs(null, cancelled, userState);
async.PostOperationCompleted(delegate(object e) { OnTaskCompleted((AsyncCompletedEventArgs)e); }, completedArgs);
}
public void UploadBlobAsync(CloudBlockBlob blob, string localFile, object state)
{
TransferType = TransferTypeEnum.Upload;
//attempt to open the file first so that we throw an exception before getting into the async work
using (FileStream fs = new FileStream(localFile, FileMode.Open, FileAccess.Read)) { }
m_Blob = blob;
m_FileName = localFile;
BlobTransferWorkerDelegate worker = new BlobTransferWorkerDelegate(UploadBlobWorker);
AsyncCallback completedCallback = new AsyncCallback(TaskCompletedCallback);
lock (_sync)
{
if (TaskIsRunning)
{
throw new InvalidOperationException("The control is currently busy.");
}
AsyncOperation async = AsyncOperationManager.CreateOperation(state);
MyAsyncContext context = new MyAsyncContext();
bool cancelled;
worker.BeginInvoke(context, out cancelled, async, completedCallback, async);
TaskIsRunning = true;
TaskContext = context;
}
}
public void UploadBlobAsync(CloudBlockBlob blob, string localFile, object state)
{
TransferType = TransferTypeEnum.Upload;
//attempt to open the file first so that we throw an exception before getting into the async work
using (FileStream fs = new FileStream(localFile, FileMode.Open, FileAccess.Read)) { }
m_Blob = blob;
m_FileName = localFile;
BlobTransferWorkerDelegate worker = new BlobTransferWorkerDelegate(UploadBlobWorker);
AsyncCallback completedCallback = new AsyncCallback(TaskCompletedCallback);
lock (_sync)
{
if (TaskIsRunning)
throw new InvalidOperationException("The control is currently busy.");
AsyncOperation async = AsyncOperationManager.CreateOperation(state);
MyAsyncContext context = new MyAsyncContext();
bool cancelled;
worker.BeginInvoke(context, out cancelled, async, completedCallback, async);
TaskIsRunning = true;
TaskContext = context;
}
}
