Cancel BeginInvoke in WPF
In WPF, I am calling This.Dispatcher.BeginInvoke(DispatcherPriority.SystemIdle, mydelegete); Is there a way to cancel later that BeginInvoke method? Thanks ...
dispatcher
WPF Dispatcher.BeginInvoke and UI/Background Threads
I think I need some clarifications regarding WPFs Dispatcher.Invoke and Dispatcher.BeginInvoke usage. Suppose I have some long running 'work' code like such that is invoked on the press of a button in a simple WPF application: longWorkTextBox.Text = "Ready For Work!"; Action workAction = delegate { Console.WriteLine("Starting W...
Explain strange Dispatcher behavior (a hidden WPF feature)
I have a window with a single button within. The code-behind is private void Button_Click(object sender, RoutedEventArgs e) { Trace.TraceInformation("Button ThreadId: {0}", Thread.CurrentThread.ManagedThreadId); Thread w = new Thread((ThreadStart) Worker); w.SetApartmentState(ApartmentState.STA); // removing/adding this d...
Arraycollection not capturing the thrown event?
I have a collection of objects and each object throws an event every time its value gets updated. Im trying to capture that event by adding a listener to the arraycollection that holds it (see main class) but its not working. Honestly I'm not sure this is the correct approach. I'm avoiding using Collection.CHANGE because it fells into a...
Windows processes in kernel vs system
I have a few questions related to Windows processes in kernel and usermode. If I have a hello world application, and a hello world driver that exposes a new system call, foo(), I am curious about what I can and can't do once I am in kernel mode. For starters, when I write my new hello world app, I am given a new process, which means I ...
as3 - dispatchEvent from a parent swf to a child swf
I have one main "parent" swf that loads several other swfs. If something happens in the main swf I need to tell one of the child swfs about it. This seems to work well the other way around. Any of the children can simply dispatchEvent(), and I can set up the main swf to listen for the event. However, I can't get the child swf to catch a...
Does using dispatcher.Invoke make my thread safe?
In my WPF app I have a long running upload running, which raises progress events as it goes which updates a progress bar. The user also has a chance of cancelling the upload, or it might go wrong. These are all async events, so they need to be executed using Dispatcher.Invoke in order to update the UI. So the code looks like this, ish: ...
Which Dispatcher to use? The Window's or the Control's?
Up to now when I wanted to update an UI control from a non UI thread I used syntax like: Dispatcher.Invoke(DispatcherPriority.Normal, new Action(()=>Label1.Content="New Content")); Now I am reading some more about it I keep finding the following syntax: Label1.Dispatcher.Invoke(//same arguments; Is the latter bett...
how can redirect after a dispatcher exception?
On zend framework inside my bootstrap file i have the following code: $frontController = Zend_Controller_Front::getInstance(); try { $front->dispatch(); } catch (Exception $e) { echo "Something wrong happen"; } Instead the ugly message i want to redirect to a custom controller... how can i do that if i can not use $frontC...
Creating something similar to Dispatcher for SQL DataContext
My current project is a WPF application with an SQL Server back end. In WPF, the UI can only be modified by the UI thread. If a UI modification needs to be done on another thread, then the dispatcher object can be called and given an action. Effectively, this is mapping my Delegate to a WM_ message. Since the linq datacontexts to SQL S...
Are there any algorithms for efficient allocation and usage of UI threads for use with WPF?
WPF utilizes a single thread to dispatch events via the windows event pump. When each control is created, it is associated with a thread and consequently all activities associated with that control need to occur on that thread. We've got an application that has a large number of top-level windows, each with a host of controls within th...
Servlet "newspring" is not available
Trying to set up a new spring project and im having this issue where I get this error (HTTP Status 404 - Servlet newspring is not available) when I navigate to a page that I expect to get routed through to a controller. web.xml <servlet> <servlet-name>springapp</servlet-name> <servlet-class>org.springframework.web.servlet.Dispatcher...
How can I detect if Dispatcher.DisableProcessing is active?
An exception is raised if one tries to show a message box if the Dispatcher is suspended (Dispatcher.DisableProcessing() called). InvalidOperationException: 'Dispatcher processing has been suspended' (see here). Does anyone know how I can detect where the Dispatcher is suspended or not (so I know when to call BeginInvoke())? Edit 1: ...
How can I use the Dispatcher.Invoke in WPF? Change controls from non-main thread
I have recently started programming in WPF and bumped into the following problem. I don't understand how to use the Dispatcher.Invoke method. I have experience in threading and I have made a few simpele Windows Forms programs where I just used the Control.CheckForIllegalCrossThreadCalls = false; Yes I know that is pretty lame but thes...
How to access Dispatcher in Silverlight tests?
I am using the SL unit test framework for tests (http://code.msdn.microsoft.com/silverlightut). My code is heavily client-server communications dependant, and I access the GUI dispatcher in several places to make sure important data is only accessed on a single thread (ie. the GUI thread). This dispatcher seems unavailable in the unit t...
Is there any command to update UI immediately?
I want to update a progress bar from running 1 to 100 with this code. for (int i = 0; i <= 100; i++) { System.Threading.Thread.Sleep(100); progressBar1.Value = i; } But the result is, the UI freeze until looping finish. I know Dispatcher can help, but I don't want to split function. Is there any command to update UI immediat...
Manual dispatching possible in Zend Framework?
Hello guys, i'm wondering how i can manually start execute a controller action of my MVC application. My goal is to integrate the html output of /myController/myAction into another php application (typo3) using a simple include. I thought of manually instantiating the controller, the view and the layout, to bypass the dispatcher. Sadly ...
Dispatcher.Invoke hanging when ListCollectionView is monitoring Collection
My problem feels very similar to the issue mentioned in this post. Essentially, Invoke is hanging (only when run outside the debugger). I think it's due to nesting of Invoke calls. I'm using MVVM Light, and I've tried two implementations of a multi-thread friendly ObservableCollection - I've used this one for ages and recently tried t...
How to stop DispatcherTimer from inside Try - Catch?
Please, help me to understand how I could stop attempts of executing MethodOne() inside a dispatcherTimer.Tick event handler of WPF DispatcherTimer after first unsuccessful attempt of doing it. TimeSpan ts = new TimeSpan(0, 0, 5); DispatcherTimer dispatcherTimer = new DispatcherTimer(); dispatcherTimer.Tick += ne...
Struts 2 dispatcher
Hi i would like to initialize (in Struts2) a property(data loading from a file) only once and make available that property for entire struts 2 application. how can i achieve that? do i need override struts 2 dispatcher? Regards Raju ...