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POHow to update UI from another thread running in another class
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copied!<p>I am currently writing my first program on C# and I am extremely new to the language (used to only work with C so far). I have done a lot of research, but all answers were too general and I simply couldn't get it t work.</p> <p>So here my (very common) problem: I have a WPF application which takes inputs from a few textboxes filled by the user and then uses that to do a lot of calculations with them. They should take around 2-3 minutes, so I would like to update a progress bar and a textblock telling me what the current status is. Also I need to store the UI inputs from the user and give them to the thread, so I have a third class, which I use to create an object and would like to pass this object to the background thread. Obviously I would run the calculations in another thread, so the UI doesn't freeze, but I don't know how to update the UI, since all the calculation methods are part of another class. After a lot of reasearch I think the best method to go with would be using dispatchers and TPL and not a backgroundworker, but honestly I am not sure how they work and after around 20 hours of trial and error with other answers, I decided to ask a question myself.</p> <p>Here a very simple structure of my program:</p> <pre><code>public partial class MainWindow : Window { public MainWindow() { Initialize Component(); } private void startCalc(object sender, RoutedEventArgs e) { inputValues input = new inputValues(); calcClass calculations = new calcClass(); try { input.pota = Convert.ToDouble(aVar.Text); input.potb = Convert.ToDouble(bVar.Text); input.potc = Convert.ToDouble(cVar.Text); input.potd = Convert.ToDouble(dVar.Text); input.potf = Convert.ToDouble(fVar.Text); input.potA = Convert.ToDouble(AVar.Text); input.potB = Convert.ToDouble(BVar.Text); input.initStart = Convert.ToDouble(initStart.Text); input.initEnd = Convert.ToDouble(initEnd.Text); input.inita = Convert.ToDouble(inita.Text); input.initb = Convert.ToDouble(initb.Text); input.initc = Convert.ToDouble(initb.Text); } catch { MessageBox.Show("Some input values are not of the expected Type.", "Wrong Input", MessageBoxButton.OK, MessageBoxImage.Error); } Thread calcthread = new Thread(new ParameterizedThreadStart(calculations.testMethod); calcthread.Start(input); } public class inputValues { public double pota, potb, potc, potd, potf, potA, potB; public double initStart, initEnd, inita, initb, initc; } public class calcClass { public void testmethod(inputValues input) { Thread.CurrentThread.Priority = ThreadPriority.Lowest; int i; //the input object will be used somehow, but that doesn't matter for my problem for (i = 0; i < 1000; i++) { Thread.Sleep(10); } } } </code></pre> <p>I would be very grateful if someone had a simple explanation how to update the UI from inside the testmethod. Since I am new to C# and object oriented programming, too complicated answers I will very likely not understand, I'll do my best though.</p> <p>Also if someone has a better idea in general (maybe using backgroundworker or anything else) I am open to see it.</p>

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