public void Activate(CachedFileUpdaterActivatedEventArgs args)
{
// cache CachedFileUpdaterUI
cachedFileUpdaterUI = args.CachedFileUpdaterUI;
// Currently, the Desktop device family activates the app in the background. Other device families
// use a background task activation. We need to handle both cases.
//
// We can check to see if there is UI on activation to determine which case we are in, because
// we receive the FileUpdateRequest differently.
//
// If activated in the foreground (visible), then the FileUpdateRequest is passed explicitly as
// part of the activation.
//
// If activated in the background (not visible), then we subscribe to the FileUpdateRequested
// and UIRequest events. The FileUpdateRequest is received as part of the FileUpdatedRequested event,
// and UIRequested is raised when user input is needed to resolve a conflict.
bool isForegroundActivated = (cachedFileUpdaterUI.UIStatus == UIStatus.Visible);
if (isForegroundActivated)
{
fileUpdateRequest = cachedFileUpdaterUI.UpdateRequest;
fileUpdateRequestDeferral = cachedFileUpdaterUI.GetDeferral();
}
else
{
cachedFileUpdaterUI.FileUpdateRequested += CachedFileUpdaterUI_FileUpdateRequested;
cachedFileUpdaterUI.UIRequested += CachedFileUpdaterUI_UIRequested;
}
switch (cachedFileUpdaterUI.UpdateTarget)
{
case CachedFileTarget.Local:
scenarios = new List<Scenario> { new Scenario() { Title = "Get latest version", ClassType = typeof(FilePickerContracts.CachedFileUpdater_Local) } };
break;
case CachedFileTarget.Remote:
scenarios = new List<Scenario> { new Scenario() { Title = "Remote file update", ClassType = typeof(FilePickerContracts.CachedFileUpdater_Remote) } };
break;
}
if (isForegroundActivated)
{
Window.Current.Content = this;
this.OnNavigatedTo(null);
Window.Current.Activate();
}
}
void CachedFileUpdaterUI_FileUpdateRequested(CachedFileUpdaterUI sender, FileUpdateRequestedEventArgs args)
{
fileUpdateRequest = args.Request;
fileUpdateRequestDeferral = fileUpdateRequest.GetDeferral();
switch (cachedFileUpdaterUI.UIStatus)
{
case UIStatus.Hidden:
fileUpdateRequest.Status = FileUpdateStatus.UserInputNeeded;
fileUpdateRequestDeferral.Complete();
break;
case UIStatus.Visible:
break;
case UIStatus.Unavailable:
fileUpdateRequest.Status = FileUpdateStatus.Failed;
fileUpdateRequestDeferral.Complete();
break;
}
}
void CachedFileUpdaterUI_FileUpdateRequested(CachedFileUpdaterUI sender, FileUpdateRequestedEventArgs args)
{
fileUpdateRequest = args.Request;
fileUpdateRequestDeferral = fileUpdateRequest.GetDeferral();
switch (cachedFileUpdaterUI.UIStatus)
{
case UIStatus.Hidden:
if (fileUpdateRequest.File.Name.Contains("ConflictingFile"))
{
fileUpdateRequest.Status = FileUpdateStatus.UserInputNeeded;
}
else
{
fileUpdateRequest.Status = FileUpdateStatus.Complete;
}
fileUpdateRequestDeferral.Complete();
break;
case UIStatus.Visible:
break;
case UIStatus.Unavailable:
fileUpdateRequest.Status = FileUpdateStatus.Failed;
fileUpdateRequestDeferral.Complete();
break;
}
}