/// <summary>
/// Performs an update to the value if necessary.
/// </summary>
public void Update()
{
CheckAccess();
if (HasExpired)
{
try
{
if (_updater != null)
{
Value = _updater.Invoke();
}
}
catch (Exception ex)
{
if (UpdateErrorCallback == null && UpdateError == null)
{
throw;
}
else
{
UpdateErrorCallback?.Invoke(this, new UpdateErrorEventArgs(ex));
UpdateError?.Invoke(this, new UpdateErrorEventArgs(ex));
}
}
}
}
public void ExecuteUpdate()
{
_downloadWorker = new BackgroundWorker()
{
WorkerSupportsCancellation = true,
WorkerReportsProgress = true
};
_downloadWorker.DoWork += (s, e) =>
{
var fileRequest = WebRequest.Create(Manifest.PackageUrl);
var fileResponse = fileRequest.GetResponse();
InstallerPath = Path.GetTempPath() + @"\" + GetFilenameFromUrl(Manifest.PackageUrl);
using (var stream = fileResponse.GetResponseStream())
{
ReadStreamToFile(stream, InstallerPath, (int)fileResponse.ContentLength);
}
if (_downloadWorker.CancellationPending)
{
e.Cancel = true;
}
else
{
CheckSignature(InstallerPath); // will throw on error
}
};
_downloadWorker.RunWorkerCompleted += (s, e) =>
{
if (e.Cancelled)
{
Logger.Warn("update cancelled");
UpdateComplete?.Invoke(this, EventArgs.Empty);
}
else if (e.Error != null)
{
Logger.WarnException("an error occured processing update", e.Error);
UpdateError?.Invoke(e.Error, EventArgs.Empty);
}
else
{
Process.Start(InstallerPath);
Thread.Sleep(2000);
UpdateComplete?.Invoke(this, EventArgs.Empty);
App.Shutdown();
}
};
_downloadWorker.ProgressChanged += (s, e) =>
{
ProgressUpdate?.Invoke(e.ProgressPercentage);
};
_downloadWorker.RunWorkerAsync();
}
