/// <summary>
        /// 查询任务
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void SearchBtn_OnClick(object sender, RoutedEventArgs e)
        {
            TaskItems.Clear();
            List <TaskInfo> allTaskInfos = tts.GetAllFinishedTaskInfo();

            allTaskInfos.AddRange(tts.GetTaskWithName(SearchTextBox.Text));
            TaskItems.AddRange(TransferTaskItemsFromTaskInfo(allTaskInfos));

            UpdateView(false);
        }
        private void UpdateView(bool showAllTask = true)
        {
            if (showAllTask)
            {
                TaskItems.Clear();
                List <TaskInfo> allTaskInfos = tts.GetAllFinishedTaskInfo();
                allTaskInfos.AddRange(tts.GetAllUnfinishedTaskInfos());
                TaskItems.AddRange(TransferTaskItemsFromTaskInfo(allTaskInfos));
            }

            AllTasksListView.Items.Refresh();
        }