private void Download2Completed(DownloadCompletedEventArgs args, State state)
{
if (args.Error != null)
{
lock (state)
{
if (state.IsCompleted)
{
return;
}
state.IsCompleted = true;
}
DownloadAndSaveCompleted?.Invoke(this, new AsyncCompletedEventArgs(args.Error, false, null));
return;
}
bool readyToWrite;
lock (state)
{
state.Data2 = args.Data;
state.HasData2 = true;
readyToWrite = state.HasData1 && state.HasData2;
}
if (readyToWrite)
{
SaveResults(state);
}
}
private void SaveResults(State state)
{
_saveToDatabase.SaveCompleted += (_, args) =>
{
DownloadAndSaveCompleted?.Invoke(this, args);
};
_saveToDatabase.SaveAsync(state.Data1 + state.Data2);
}
public void DownloadAndSaveAsync()
{
_downloadFromInternet.DownloadCompleted += (_, args) =>
{
if (args.Error != null)
{
DownloadAndSaveCompleted?.Invoke(this, new AsyncCompletedEventArgs(args.Error, false, null));
return;
}
var data = args.Data;
_saveToDatabase.SaveCompleted += (_, args) =>
{
DownloadAndSaveCompleted?.Invoke(this, new AsyncCompletedEventArgs(args.Error, false, null));
};
_saveToDatabase.SaveAsync(data);
};
_downloadFromInternet.DownloadAsync();
}
