async void OnPrintTaskSourceRequested(PrintTaskSourceRequestedArgs args)
{
var def = args.GetDeferral();
await Windows.ApplicationModel.Core.CoreApplication.MainView.CoreWindow.Dispatcher.RunAsync(Windows.UI.Core.CoreDispatcherPriority.Normal, () =>
{
args.SetSource(printDoc.DocumentSource);
});
def.Complete();
}
private async void OnPrintTaskSourceRequrested(PrintTaskSourceRequestedArgs args)
{
var def = args.GetDeferral();
await Dispatcher.RunAsync(Windows.UI.Core.CoreDispatcherPriority.Normal,
() =>
{
args.SetSource(printDoc?.DocumentSource);
});
def.Complete();
}
private void HandlePrintTaskSourceRequested
(PrintTaskSourceRequestedArgs args)
{
// Called when a printer is selected from the printers list panel
Debug.WriteLine("PrintTask Source Requested");
// Request a deferral to accommodate the async operation
var deferral = args.GetDeferral();
// Set the document source for the current print job.
// This MUST happen on the UI thread.
_dispatcher.RunAsync(CoreDispatcherPriority.Normal, () =>
{
args.SetSource(_printDocument.DocumentSource);
// Complete the deferral to indicate completion
deferral.Complete();
});
}
async void OnPrintTaskSourceRequestedHandler(PrintTaskSourceRequestedArgs args)
{
var deferral = args.GetDeferral();
await this.Dispatcher.RunAsync(CoreDispatcherPriority.Normal,
() =>
{
this.document = new PrintDocument();
this.document.Paginate += OnPaginate;
this.document.GetPreviewPage += OnGetPreviewPage;
this.document.AddPages += OnAddPages;
args.SetSource(this.document.DocumentSource);
}
);
deferral.Complete();
}