backgroundworker

问题 I'm looking at .Net-Core 2.1 new feature Hosted Services, I see that they are very similarly modelled to QueueBackgroundWorkItem The Queue Background work item seems to have a limitation that the task must execute within 90 seconds The AppDomain shutdown can only be delayed 90 seconds (It’s actually the minimum of HttpRuntimeSection.ShutdownTimeout and processModel shutdownTimeLimit). If you have so many items queued that they can’t be completed in 90 seconds, the ASP.NET runtime will unload

问题 I have three threads in total. The first is the main UI thread, which starts a System.Threading.Thread ( ExperimentThread ), which in turn starts a BackgroundWorker ( WorkerThread ). MainThread and WorkerThread both access a shared resource. I synchronise access to this resource with the following object: private static readonly Object LockObject = new Object(); which I use as follows in the main loop of each thread: lock (LockObject) { // Do something with shared resource here. } A cut-down

问题 I want to add multiple progress bars to a WinForm in order to monitor three potentially long processes that are in a nested loop. I theorized that I should be able to use just one Background worker thread, is the following implementation acceptable: Here is my Class where the work is being done: class Class1 { public static void UpdatePB(BackgroundWorker worker) { for (int i = 1; i <= 10; i++) { for (int ii = 1; ii <= 10; ii++) { for (int iii = 1; iii <= 10; iii++) { Thread.Sleep(10); worker

问题 I have been fighting with multi threading for few days. I dont understand what are different ways of multithreading . I have read little bit about backgroundWorker , little bit about creating an object of thread. Yesterday I saw in delegate example to implement multithreading by calling BeginInvoke . I dont understand are these different ways of multithreading or are same working on same background class. Please help me in making it clear to me. 回答1: I like this explanations very much. Maybe

问题 I call obackgroundworker.CancelAsync(); on a background worker currently doing some work in another thread and then using while (obackgroundworker.IsBusy == true) to wait for it to finish before quitting the application (in case the user changes their mind while the thread is away processing and I want to close down cleanly) The flat for cancellation pending is set to true correctly but the thread doesn't quit, in the worker thread i have: backgroundworker obackgroundworker =

问题 My application often fetch data from a webpage using WebRequest, but it isn't possible to click buttons etc while it's fetching. I've understood that I have to use threads/a backgroundworker, but I can't get it to work properly; it doesn't make the GUI more respondable. The code I want to apply some kind of threading on, so that it stops making my application unresponding: public string SQLGet(string query) { string post = "q=" + query; WebRequest request = WebRequest.Create("http://test.com"

问题 Will anyone please give me an example for downloading files in wp7 using Background file transfer and how to use BackgroundWorker Class to download files. 来源： https://stackoverflow.com/questions/9426110/how-to-use-backgroundworker-class-wp7

问题 I need a little (or big) help with my form: I need to use everything inside the "Organize function" region in a separate thread. I press a button in my form's "Start button" region to call the first sub of the "Organize function" subs; the first sub calls the second sub and the second sub calls the third sub. I tried adding the third sub into a separate thread by myself and then using the second sub to pass the argument to the thread but all I've done is wrong. Can someone please help me do

问题 In my application I have a main windows and into it, in a frame I load a page. This page do a long time task when the user press a button. My problem is that when long task is being doing and the user presses the close button of the main window, the application seems to not finish because I am debugging it in VS2008 and I can see the stop button highlighted. If I want to finish I have to press stop button, the application doesn't stop the debugging automatically on application exit. I thought

问题 Ok. I have a program that monitors 2 COM ports. One is hooked to a scale and the other is hooked to a modbus board. My problem is in the COM port attached to the modbus board. My program is reading a sensor (on the modbus board) every 100MS. It returns a 0 or 1 (over the COM port) to determine whether the sensor is blocked. If it is blocked, a signal is sent over the port to the board. My problem is I can't quit monitoring the sensor, but I have to be sure the com port is not in use before