dispatcher

I'm building a WPF application. I'm doing some async communication with the server side, and I use event aggregation with Prism on the client. Both these things results in new threads to be spawned which are not the UI thread. If I attempt to do "WPF operations" on these callback and event handler threads the world will fall apart, which it now has started doing. First I met problems trying to create some WPF objects in the callback from server. I was told that the thread needed to run in STA mode. Now I'm trying to update some UI data in a Prism event handler, and I'm told that: The caller

Neither of these work: _uiDispatcher.Invoke(() => { }); _uiDispatcher.Invoke(delegate() { }); All I want to do is Invoke an inline method on my main UI thread. So I called this on the main thread: _uiDispatcher = Dispatcher.CurrentDispatcher; And now I want to execute some code on that thread from another thread. How do I do it? Am I using the wrong syntax? Note that this is not a WPF application; I've referenced WindowsBase so I could get access to the Dispatcher class. The problem is that you aren't providing the exact type of delegate you want to invoke. Dispatcher.Invoke just takes a

Whenever I refresh a label, I got this error: The calling thread cannot access this object because a different thread owns it. I tried to invoke but it's failed. I'm using WPF Form. delegate void lostfocs(string st); private void imgPayment_MouseLeftButtonDown(object sender, MouseButtonEventArgs e) { Thread t = new Thread(modi); t.Start(); } void modi() { try { label1.Content = "df"; } catch { lostfocs ld = new lostfocs(up); // ld.Invoke("df"); object obj=new object(); ld.Invoke("sdaf"); } } void up(string st) { label1.Content = st; } Use Dispatcher.Invoke Method. Executes the specified

I'm confused why I can't make this test counter application work with 2 (or more) simultaneous running countertextboxes with the use of "BeginInvoke" on my Dispatcher in the Count() method. You can solve the issue by replacing the BeginInvoke by an Invoke. But this doesn't solve my confusion. Here's the sample code I'm talking about: public class CounterTextBox : TextBox { private int _number; public void Start() { (new Action(Count)).BeginInvoke(null, null); } private void Count() { while (true) { if (_number++ > 10000) _number = 0; this.Dispatcher.BeginInvoke(new Action(UpdateText), System

In my WPF application I need to do an async-operation then I need to update the GUI. And this thing I have to do many times in different moment with different oparations. I know two ways to do this: Dispatcher and BackgroundWorker. Because when I will chose it will be hard for me to go back, I ask you: what is better? What are the reasons for choosing one rather than the other? Thank you! Pileggi The main difference between the Dispatcher and other threading methods is that the Dispatcher is not actually multi-threaded. The Dispatcher governs the controls, which need a single thread to

I'm building a Windows Store app, and I have some code that needs to be posted to the UI thread. For that, i'd like to retrieve the CoreDispatcher and use it to post the code. It seems that there are a few ways to do so: // First way Windows.ApplicationModel.Core.CoreApplication.GetCurrentView().CoreWindow.Dispatcher; // Second way Window.Current.Dispatcher; I wonder which one is correct? or if both are equivalent? MAXE This is the preferred way: Windows.ApplicationModel.Core.CoreApplication.MainView.CoreWindow.Dispatcher.RunAsync(CoreDispatcherPriority.Normal, () => { // Your UI update code

first I need to say that I´m noob with WPF and C#. Application: Create Mandelbrot Image (GUI) My dispatcher works perfectly this this case: private void progressBarRefresh(){ while ((con.Progress) < 99) { progressBar1.Dispatcher.Invoke(DispatcherPriority.Send, new Action(delegate { progressBar1.Value = con.Progress; } )); } } I get the Message (Title) when tring to do this with the below code: bmp = BitmapSource.Create(width, height, 96, 96, pf, null, rawImage, stride); this.Dispatcher.Invoke(DispatcherPriority.Send, new Action(delegate { img.Source = bmp; ViewBox.Child = img; //vllt am