public async void ObjectStorageFileList()
        {
            nlog.Warn("ObjectStorageFileList Started");
            workObjectStorage = true;
            StatusUpdate(Status.Working);
            try
            {
                ConfigSaveAllItem();

                Task <List <ObjectStorageFile> > result = objectStorage.list(config.GetEnumValue(Category.Config, Key.ObjectBucket));
                dgvObjectStorage.InvokeIfRequired(s =>
                {
                    s.Rows.Clear();
                    s.RowHeadersVisible = false;
                    s.BackgroundColor   = Color.White;
                });
                List <ObjectStorageFile> files = await result;
                long uiRefresh = 0;
                foreach (var file in files)
                {
                    if ((System.Text.RegularExpressions.Regex.IsMatch(file.Name
                                                                      , textFilterString.Text
                                                                      , System.Text.RegularExpressions.RegexOptions.IgnoreCase)) ||
                        textFilterString.Text.Length == 0
                        )
                    {
                        dgvObjectStorage.InvokeIfRequired(s =>
                        {
                            int n = s.Rows.Add();
                            s.Rows[n].Cells[0].Value = "false";
                            s.Rows[n].Cells[1].Value = file.Name;
                            s.Rows[n].Cells[2].Value = file.Length;
                            s.Rows[n].Cells[3].Value = String.Format("{0:yyyy-MM-dd HH:mm:ss}", System.DateTime.Parse(file.LastWriteTime));
                        });
                    }
                    if (uiRefresh % 100 == 0)
                    {
                        StatusUpdate(Status.Working);
                    }
                    uiRefresh++;
                }
            }
            catch (Exception ex)
            {
                nlog.Error(string.Format("{0},{1}", ex.Message, ex.StackTrace));
                workObjectStorage = false;
            }
            StatusUpdate(Status.Completed);
            workObjectStorage = false;
            nlog.Warn("ObjectStorageFileList Completed");
        }