How to add a ProgressBar progress bar?

The official code sample can be found at CodePlex . As the CodePlex closes soon, here is the squeeze:

 // модель double progress; double Progress { get => progress; set { if (progress != value) { progress = value; // отправляете нотификацию об изменении прогресса } } } 

 Progress = 0; cmpr.Compressing += OnCompressingProgress; cmpr.CompressionFinished += OnCompressionFinished; cmpr.BeginCompressFiles(...); // асинхронная операция 

 void OnCompressingProgress(object sender, ProgressEventArgs e) => Progress += e.PercentDelta / 100.0; void OnCompressionFinished(object sender, EventArgs e) { Progress = 1.0; var cmpr = (SevenZipCompressor)sender; cmpr.Compressing -= OnCompressingProgress; cmpr.CompressionFinished -= OnCompressionFinished; } 

At the VM level, you need to subscribe for notifications from the model, perhaps smashall them into a UI thread, and update the CompressionProgress INPC property. (This is a different property, not one that is in the model!)

At the View level, you simply bind to the CompressionProgress property of the VM:

 <ProgressBar Value="{Binding CompressionProgress}" Minimum="0" Maximum="1"/> 

Like everything.