Hi guys, I need an alternative for Dispatcher (.net 3.0) to use for a windows service (done in .net 2.0). Can you give me some idea how to achieve something like that or point me some links? I know that a dispatcher has a SynchronizationContext behind, but I don't know how I can use a SynchronizationContext into a service. If you thin...
According to Single-Threaded Application with Long-Running Calculation MSDN example, there is a possibility of creating a responsive GUI in just 1 thread. Thanks to the Dispatcher object, as we can set the Priority of work items. My question is, what sense does it have to do simple tasks (supposing we just have 1 single core cpu) in a ...
I was wondering how I would use the Dispatcher in WPF to safely update my BindingList collection from another thread? I am also open for other solutions, Many Thanks, Kave ...
I'm aware, and use, the xxx.Dispatcher.Invoke() method to get the background thread to manipulate GUI elements. I think I'm bumping up against something similar, but slightly different, where I want a long running background task to construct a tree of objects and when done hand it to the GUI for display. Attempting to do that results i...
As luck would have it, I am creating a Rails application (2.3.8) in which I need to change where a request is dispatched based on some criteria. Basically, I need a custom dispatcher. I have looked at using Rack to modify the request, and in certain instances, re-route the request to a different controller that knows that to do with th...
I haven't been able to find an example like this, though I'm sure there must be a few out there. When the user clicks a button to log in, an event handler on the button click calls a function that logs the user in. Based on the user, they can be taken to one of many start screens. The information for which screen is returned from a serv...
Why does this not work? What I am trying to do: I need a way to run specific methods in a specific thread that lives on till the end of the program. My other possible options: As I understand a possible way to do it would be to implement a queue. Into which I could push in methods I want to be run in the specific thread. In the specifi...
I have all my data bound from WPF controls to properties in an object that my Window can access. When I run a backgroundworker thread, do I need a dispatcher to access these underlying properties, or since I'm not explicitly accessing the UI controls, is that handled automatically by the mechanism binding the XAML to the code properties...
Hi, here's what I need (it's a bit hard to explain): I have 2 window controls: MainWindow and FileMover and 1 util class: FileMonitor MainWindow created a new object of FileMonitor for testing purposes on it's Loaded event, which creates a FileSystemWatcher and a Timer object. The FileSystemWatcher watches a given folder for Created an...
While going through this article I came across this statement - If you are writing your own WPF objects, such as controls, all methods you use should call VerifyAccess before they perform any work. This guarantees that your objects are only used on the UI thread, like this //Using VerifyAccess and CheckAccess public clas...
I want to create a control which takes a while to create (Pivot) and then add it to the visual tree. To do this i would need to change the dispatcher of the control (and its heirachy) before adding it to the VisualTree. Is this possible? Are there any implications of walking the controls trees and setting the _dispatcher field via refle...
I'm relatively new to WPF. I'm examining some code that looks like this: private void button_Click(object sender, RoutedEventArgs e) { //Queue on dispatcher in the background so it doesn't make the UI slow Dispatcher.BeginInvoke(new dMyDelegate(PerformOperation), DispatcherPriority.Background); } From the comment, I'm gue...
In WPF due to the intricacies on how the interface is updated I sometimes have to perform actions after a short delay. Currently I'm doing this simply by: var dt = new DispatcherTimer(DispatcherPriority.Send); dt.Tick += (s, e) => { dt.Stop(); //DoStuff }; dt.Interval = ...
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 reaso...
Hi everyone! I need only to show a custom control (a clock with rotating hands) and with this to replace the mouse cursor, the problem is that if I write: Me.gridScreen.Visibility = Visibility.Visible ' some operations that takes about 1 second Me.gridScreen.Visibility = Visibility.Hidden (gridScreen is the grid that contains the user-...
Let's say I have a package called 'animal' including Animal parent class, Cat extends from Animal, Dog extends from Animal, also. Animal, however, is designed like this: class Animal { int amount; Animal next; // Then a constructor initializes these. drinkWater(int n) { ... } } Cat & Dog classes follow this structure: class Ca...
The classic advice in multithreading programing is to do processor heavy work on a background thread and return the result to the UI thread for minor processing (update a label, etc). What if generating the WPF element itself is the operation which is expensive? I'm working with a third party library which generates some intense elemen...
Hi All, I am working on creating a WPF solution which uses MVVM pattern to load searched items in a search control asynchronously. The search control which is a WPF usercontrol is created with a textbox to enter search text and search button and a hidden listbox which would be visible when it loads the searched items list in it. This us...
I have an application which has to monitor 211 rods, and every 5 seconds it will update 2 ListBox controls, each one containing either the inserted rods or the removed ones. When I manually use the button for inserting/removing rods the code executes perfectly and the ListBoxes update properly. When I use the global button which inserts ...
Hello to everyone, I'm trying to setup a Spring MVC project. I posted my configuration files below. I'll be really glad if someone helps me. Thanks in advance, With regards, Talha. web.xml <?xml version="1.0" encoding="UTF-8"?> <web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://java.sun.com/xml/ns/java...