public async static Task DownloadLatestUiInstaller(MainWindow mainWindow, string url, Action <bool, FileInfo> onDownloadUiInstallerComplete)
{
ProgressDialogController controller = null;
try
{
var fileName = Path.GetFileName(new Uri(url).LocalPath);
var filePath = new FileInfo(Path.Combine(FileSystem.DownloadDirectory.FullName, fileName));
if (!filePath.Directory.Exists)
{
filePath.Directory.Create();
}
if (filePath.Exists)
{
filePath.Delete();
}
filePath.Refresh();
controller = await mainWindow.ShowProgressAsync("Please wait...", "Downloading GUI installer", isCancelable : true);
controller.SetProgressBarForegroundBrush(Brushes.Orange);
controller.SetIndeterminate();
controller.Maximum = 100d;
await Task.Yield();
await Task.Delay(200);
var downloader = Network.DownloadFromURL(url, filePath.FullName,
new DownloadProgressChangedEventHandler((s, progressEvent) =>
{
mainWindow.Invoke(() =>
{
var percentage = (double)progressEvent.BytesReceived / progressEvent.TotalBytesToReceive * 100;
controller.SetProgress(percentage);
});
}),
new System.ComponentModel.AsyncCompletedEventHandler(async(s, completedEvent) =>
{
await mainWindow.Invoke(async() =>
{
if (completedEvent.Error != null)
{
if (!(completedEvent.Error is WebException) || ((WebException)completedEvent.Error).Status != WebExceptionStatus.RequestCanceled)
{
ShowMessageBox("Error downloading GUI installer", completedEvent.Error.Message);
onDownloadUiInstallerComplete(false, null);
}
}
else
{
filePath.Refresh();
onDownloadUiInstallerComplete(true, filePath);
}
if (controller != null && controller.IsOpen)
{
await controller.CloseAsync();
}
});
}));
controller.Canceled += (s, cancelEvent) => downloader.CancelAsync();
controller.Closed += (s, closeEvent) => downloader.Dispose();
}
catch (Exception ex)
{
ShowMessageBox("Error downloading GUI installer", ex.Message);
}
}