waithandle

问题 According to documentation, WaitHandle in .NET should be explicitly/implicitly disposed. However, I'm having trouble achieving this for the following basic synchronization task: a time consuming task is being executed on a thread. the main thread waits for the task to complete for a predefined time-period. The main thread must proceed if a. the task is completed or b. the timeout occurred. Here my attempt at using an AutoResetEvent object: using(var waitHandle = new AutoResetEvent(false)){

问题 I have this basic scraping console application in C# that Asynchronously uses WebRequest to get html from a list of sites. It works fine, but how do I set up a trigger that goes off when every site in the list has been processed? I've spent a couple hours researching various solutions online, including the MS docs, but none of them provide a straight forward answer via code. I've read about the IAsyncResult.AsyncWaitHandle but I have no clue how to integrate it into my code. I'd just like to

问题 I have this basic scraping console application in C# that Asynchronously uses WebRequest to get html from a list of sites. It works fine, but how do I set up a trigger that goes off when every site in the list has been processed? I've spent a couple hours researching various solutions online, including the MS docs, but none of them provide a straight forward answer via code. I've read about the IAsyncResult.AsyncWaitHandle but I have no clue how to integrate it into my code. I'd just like to

问题 I'm wondering how to safely change at runtime the EventWaitHandle that a thread should wait on. Suppose for instance that there are two threads (A and C) that are synchronized through EventWaitHandles. A does its job cyclically and C waits until it receives notification from A that it can start doing its job (e.g. by the AutoResetEvent). The pattern is A-C-A-C... Later on a new thread (B) is launched (e.g. by user action) and its job should be executed in between the two preexistent threads

问题 HttpWebRequest.BeginGetResponse doesn´t respect any Timeout properties from HttpWebRequest(Timeout or ReadWriteTimeout). I read some approaches to get the same results, but I don't know if it's the best way to do it and if I should use for few calls or I can scale it inside loops(I am doing a webcrawler). The important thing is, initially my code isn´t async, I just need async because my method should accept a CancellationToken. My concern is about WaitHandles and ThreadPool

问题 I have the following code which has the goal to wait for all given wait handles but is cancellable by a specific wait handle: public static bool CancelableWaitAll(WaitHandle[] waitHandles, WaitHandle cancelWaitHandle) { var waitHandleList = new List<WaitHandle>(); waitHandleList.Add(cancelWaitHandle); waitHandleList.AddRange(waitHandles); int handleIdx; do { handleIdx = WaitHandle.WaitAny(waitHandleList.ToArray()); waitHandleList.RemoveAt(handleIdx); } while (waitHandleList.Count > 1 &&

问题 Both Thread.Sleep(timeout) and resetEvent.Wait(timeout) cause execution to pause for at least timeout milliseconds, so is there a difference between them? I know that Thread.Sleep causes the thread to give up the remainder of its time slice, thus possibly resulting in a sleep that lasts far longer than asked for. Does the Wait(timeout) method of a ManualResetEvent object have the same problem? Edit : I'm aware that a ManualResetEvent's main point is to be signaled from another thread - right

问题 I have a function that is called in rapid succession that has a open database connection. my issue is that before one database connection is closed, another instance of the function is called and i could possibly receive a deadlock in the database. I have tried: private static WaitHandle[] waitHandles = new WaitHandle[] { new AutoResetEvent(false) }; protected override void Broadcast(Data data, string updatedBy) { Action newAction = new Action(() => { DataManagerFactory.PerformWithDataManager

问题 I have a Problem with some of my Methods and I think, a WaitHandle is the solution. I create a Incident through a API to a Ticketsystem. private void create_Incident(string computer_idn, string swidn_choice, string swName_choice, string CI_Number, String windows_user) { string msg_id = "" + computer_idn + "_" + swidn_choice + ""; string username = "BISS"; hajas211ilt3.ILTISAPI api = new hajas211ilt3.ILTISAPI(); api.BeginInsertIncident(username, "", msg_id, "", "", "2857", "BISS - Software

问题 WaitHandle.WaitAll throws a NotSupportedException when executed on Windows Phone (7.1). Is there an alternative to this method? Here's my scenario: I am firing off a bunch of http web requests and I want to wait for all of them to return before I can continue. I want to make sure that if the user has to wait for more than X seconds (in total) for all of these requests to return, the operation should be aborted. 回答1: You can try with a global lock. Start a new thread, and use a lock to block