private async void DownloaderStateChanged(Enums.DownloadState state)
{
await Dispatcher.RunAsync(Windows.UI.Core.CoreDispatcherPriority.Normal, async() =>
{
Debug.WriteLine("State Change: " + state.ToString());
VisualStateManager.GoToState(this, state.ToString(), false);
if (state == Enums.DownloadState.Done)
{
SizeBlock.Text = StringConverter.GetPrintSize(downloader.Message.DownloadSize);
string folderPath = (await StorageManager.TryGetFolderAsync(downloader.Message.FolderToken))?.Path;
if (folderPath == null)
{
folderPath = Strings.AppResources.GetString("FolderNotExist");
}
SpeedBlock.Text = folderPath;
Models.DownloaderMessage message = downloader.Message;
NameBlock.Text = message.FileName + message.Extention;
}
else if (state == Enums.DownloadState.Prepared)
{
Models.DownloaderMessage message = downloader.Message;
NameBlock.Text = message.FileName + message.Extention;
int per = (int)((message.FileSize == null) ? 0
: (100f * message.DownloadSize / message.FileSize));
ProgressBlock.Text = (message.FileSize == null) ? "-%" : (per + "%");
Bar.Value = per;
SizeBlock.Text = StringConverter.GetPrintSize(message.DownloadSize)
+ " / " + (message.FileSize == null ? "--" :
StringConverter.GetPrintSize((long)message.FileSize));
SpeedBlock.Text = "-/s ";
}
});
}
private async void DownloadCompleted(Models.DownloaderMessage message)
{
//必须Dispose(), 否则里面的Timer不会停止
downloader.Dispose();
await MainPage.Current.Dispatcher.RunAsync(Windows.UI.Core.CoreDispatcherPriority.Normal,
() => { MainPage.Current.DownloadBarCollection.Remove(this); });
}
private async void DownloadCompleted(Models.DownloaderMessage message)
{
var folder = await StorageManager.TryGetFolderAsync(message.FolderToken);
//播放一个通知
if (Settings.IsNotificationShownWhenTaskCompleted)
{
Toasts.ToastManager.ShowDownloadCompleteToastAsync(Strings.AppResources.GetString("DownloadCompleted"), message.FileName + " - " +
Converters.StringConverter.GetPrintSize((long)message.FileSize),
Path.Combine(folder.Path, message.FileName + message.Extention),
folder.Path);
}
await MainPage.Current.Dispatcher.RunAsync(Windows.UI.Core.CoreDispatcherPriority.Normal,
() => {
MainPage.Current.DownloadBarManager.Invoke(
(collection) =>
{
int completed = collection.Count - 1;
for (int i = collection.Count - 1; i >= 0; --i)
{
if (collection[i].downloader.Message.IsDone)
{
if (completed == i)
{
--completed;
continue;
}
else
{
collection.Move(i, completed);
--completed;
++i;
}
}
}
}
);
});
}
/// <summary>
/// 从url获取网络信息
/// </summary>
public static async Task <Models.DownloaderMessage> GetMessageAsync(string url)
{
Models.DownloaderMessage message = new Models.DownloaderMessage();
try
{
HttpWebRequest req = WebRequest.CreateHttp(url);
HttpWebResponse res = (HttpWebResponse)(await req.GetResponseAsync());
message.URL = url;
//文件全名 XXX.XXX
string fullName = GetResponseName(res);
message.FileName = System.IO.Path.GetFileNameWithoutExtension(fullName);
message.Extention = System.IO.Path.GetExtension(fullName);
message.FileSize = GetResponseSize(res);
if (res != null)
{
res.Dispose();
res = null;
}
if (req != null)
{
req.Abort();
req = null;
}
GC.Collect();
return(message);
}
catch (Exception e)
{
Debug.WriteLine(e.ToString());
throw e;
}
}
private async void DownloaderStateChanged(Enums.DownloadState state)
{
//在后台运行（挂起或最小化）不更新UI
if (((App)App.Current).InBackground)
{
return;
}
await Dispatcher.RunAsync(Windows.UI.Core.CoreDispatcherPriority.Normal, () =>
{
if (state == Enums.DownloadState.Pause)
{
PauseButton.IsEnabled = false;
PlayButton.IsEnabled = true;
DeleteButton.IsEnabled = true;
RefreshButton.IsEnabled = true;
Bar.ShowPaused = true;
}
else if (state == Enums.DownloadState.Error)
{
PauseButton.IsEnabled = false;
PlayButton.IsEnabled = false;
DeleteButton.IsEnabled = true;
RefreshButton.IsEnabled = true;
Bar.ShowPaused = true;
}
else if (state == Enums.DownloadState.Downloading)
{
PauseButton.IsEnabled = true;
PlayButton.IsEnabled = false;
DeleteButton.IsEnabled = true;
RefreshButton.IsEnabled = true;
Bar.ShowPaused = false;
}
else if (state == Enums.DownloadState.Done)
{
Bar.Value = 100;
ProgressBlock.Text = "100%";
PlayButton.IsEnabled = false;
PauseButton.IsEnabled = false;
DeleteButton.IsEnabled = false;
RefreshButton.IsEnabled = false;
}
else if (state == Enums.DownloadState.Prepared)
{
HideGlassLabel.Begin();
Models.DownloaderMessage message = downloader.Message;
NameBlock.Text = message.FileName + message.Extention;
PauseButton.IsEnabled = false;
PlayButton.IsEnabled = true;
DeleteButton.IsEnabled = true;
RefreshButton.IsEnabled = false;
int per = (int)((message.FileSize == null) ? 0
: (100f * message.DownloadSize / message.FileSize));
ProgressBlock.Text = (message.FileSize == null) ? "-%" : (per + "%");
Bar.Value = per;
SizeBlock.Text = StringConverter.GetPrintSize(message.DownloadSize)
+ " / " + (message.FileSize == null ? "--" :
StringConverter.GetPrintSize((long)message.FileSize));
SpeedBlock.Text = "-/s ";
}
});
}
