Progress Without Refresh

Real-Time Apps with Server PushModule 3The lesson guide, the walkthrough video, the knowledge check and the hands-on lab this sample was built from are on learnwisej.com — free, with an AI tutor in every lesson.

Open the course

This example is the Import Monitor panel of TicketOps Live. An import of 200 simulated records runs on a task started from the click (Application.StartTask), pushes progress to the browser every 10 records with Application.Update(this), supports cooperative cancellation (CancellationTokenSource), can fail on purpose at record 87, and always restores the UI in finally. Every log line carries a JobId (the extension challenge).

The source of this sample

iceteagroup/LearnWisej-SamplesReal-Time Server Push Course/Module 3

Browse this folder on GitHub

Or clone it: git clone https://github.com/iceteagroup/LearnWisej-Samples.git — then open TicketOpsLive.slnx in Visual Studio and press F5.

Run it

cd "LearnWisej-Samples/Real-Time Server Push Course/Module 3/TicketOpsLive"
dotnet run -f net10.0 --urls http://localhost:5303

Then open http://localhost:5303. (Visual Studio: open TicketOpsLive.slnx, press F5.)

What to try

Button	What you should see
Start Import	the bar, recordsImportedLabel (n/200) and the elapsed time move without a refresh; the log gets "Import started", "Imported 50/100/150/200 records", "Import completed" and a summary line (Job J-xxxxxx: 200 records in 5.3 s — completed)
Cancel Import (while running)	the loop stops between two records: "Import cancelled by user.", "Cancelled at … after record n"; Start is enabled again
Fail at 87	the import runs to record 86, then "Import failed. Review the server log." and "Failed at … on record 87"; the full exception is on the server console under the JobId; Start is enabled again

Polling fallback. Add "enableWebSocket": false to Default.json and restart: progress still arrives on the polls (about a second late); polling is requested when the import starts and ended when it finishes.