/// <summary> /// 开始下载 /// </summary> private async void Btn_ok_Click(object sender, RoutedEventArgs e) { int i = 0; flyout_download.Hide(); foreach (Pages item in ReadyList.SelectedItems) { try { cid = item.Cid; VideoURL url = await ContentServ.GetVedioURL(cid, quality, format); string name = StringDeal.RemoveSpecial(title.Text); string part = StringDeal.RemoveSpecial(item.Part); StorageFolder folder = await DownloadHelper.GetMyFolderAsync(); StorageFolder f1 = await folder.CreateFolderAsync(name, CreationCollisionOption.OpenIfExists); List <DownloadOperation> list = new List <DownloadOperation>(); for (int j = 0; j < url.Ps.Count; j++) { list.Add(await DownloadHelper.Download(url.Ps[j].Url, $"{part}_{j}.{format.ToString()}", f1)); } // 如果await,那么执行完第一个StartAsync()后即退出循环.GetCurrentDownloadsAsync()方法同样会遇到此问题.(Download页) IAsyncOperationWithProgress <DownloadOperation, DownloadOperation> start; for (int k = 0; k < list.Count; k++) { start = list[k].StartAsync(); } i++; await DownloadHelper.AddVideoInfo(part, cid, details.Sid); await popup.Show(i.ToString() + "个视频已加入下载队列"); if (SettingHelper.ContainsKey("_downdanmu")) { if ((bool)SettingHelper.GetValue("_downdanmu") == false) { continue; } } await DownloadHelper.DownloadDanmakuAsync(cid, part, f1); } catch (Exception err) { await popup.Show(err.Message); } } SwitchCommandBar(false); }