public void Reset()
{
_args = null;
TotalSize = 0;
_bytesTransferred = 0;
_processedSize = 0;
}
private void UpdateProgressCallback()
{
var now = DateTimeOffset.UtcNow;
var diff = now - _lastFastUpdate;
if (diff > _fastUpdateInterval)
{
if (ProgressChanged != null)
{
if (_args == null)
{
_args = new TransferProgressChangedEventArgs {
TotalSize = TotalSize
}
}
;
var slowUpdateDiff = now - _lastSlowUpdate;
if (slowUpdateDiff > _slowUpdateInterval)
{
_args.Speed = (_bytesTransferred - _lastUpdateBytesTransferred) / slowUpdateDiff.TotalSeconds;
if (TotalSize > 0)
{
var estimatedBytesToTransfer =
_processedSize / (double)_bytesTransferred * (TotalSize - _processedSize);
_args.EstimatedTime = TimeSpan.FromSeconds(estimatedBytesToTransfer / _args.Speed);
}
_lastUpdateBytesTransferred = _bytesTransferred;
_lastSlowUpdate = now;
}
if (TotalSize > 0)
{
_args.Progress = _processedSize / (double)TotalSize;
}
_args.ProcessedSize = _processedSize;
ProgressChanged?.Invoke(this, _args);
_lastFastUpdate = now;
}
}
}
}