I am working on a C# based automation desktop app (using WPF) and I have encountered an issue.

The automation process is quite computationally intensive, and as such the WPF window is completely frozen by this.

And yes, I have looked at running the code asynchronously, but that causes more errors, as code is being run before it should be.

What I need is a way to run that code on a different thread to the UI, allowing the user to interact with it while the app is running.

Thanks

CodePudding user response：

Well, the answer depends on whether you need to push results back to UI thread or not.

If not - use TPL, Parallel.For/ForEach to process collections in parallel. Methods returns ParallelLoopResult, which allows to check state of computation. See docs

Other way, as mentioned in comments, is to use Task - Task.WhenAll/Task.WaitAll. While WaitAll is essentially synchronous and still will freeze your app, WhenAll is not. I guess problems you get are related to accessing UI from non-main thread, which requires using Dispatcher (there is a method to queue Action to be ran on main thread). General advice - first await Task.WhenAll(...), then work with UI.

Also, see this article for more clues.

CodePudding user response：

As it would turn out, I was accessing the UI from the second thread, which according to WPF is a big nono.