此BackgroundWorker当前正忙，无法在循环c#中同时运行多个任务 [英] This BackgroundWorker is currently busy and cannot run multiple tasks concurrently inside for loop c#

问题描述

如果我单击一次for循环内多次启动backgroundworker的按钮，则会收到此错误.

I get this error if I click a button that starts the backgroundworker multiple times inside for loop.

{"This BackgroundWorker is currently busy and cannot run multiple tasks 
concurrently."}

如何在每个循环中正确地运行我的代码?

How do I work my code properly in each and every loop ?

Form1.cs

private void CreateUserClick(object sender, RoutedEventArgs e)       
{
    for (int i = 0; i < 5; i++)
    {                    
        User parameters = new User
        {
            user = UserTextBox.Text + i,                         
        };

        BackgroundWorker CreateUserWorker = new BackgroundWorker();

        CreateUserWorker.DoWork += new DoWorkEventHandler(DataWorkers.CreateUserWork);

        DataWorkers.InitiateWork(sender, CreateUserWorker, parameters);
    }
}

DataWorkers.cs

DataWorkers.cs

public class DataWorkers
{
    public static readonly BackgroundWorker CreateUserWorker = new BackgroundWorker();

    public static void HookUpWorkersLogic()
    {
        CreateAccountWorker.DoWork += CreateUserWork;
    }

    public static void InitiateWork(
        object sender,
        BackgroundWorker worker,
        WorkerParameters parameters = null)
    {
        StaticElements.InvokerButtons[worker] = new InvokerButton(sender);

        StaticElements.InvokerButtons[worker].Button.IsEnabled = false;
        StaticElements.InvokerButtons[worker].Button.Content = "Wait...";

        worker.RunWorkerAsync(parameters);
    }
}

我已经在下面的forloop中进行了此更改，但此更改后仍未唤醒，也未获得任何异常，但应用程序挂起了

I have made this change below in forloop, but still not wokring nor getting any exception after this change but application hangs up

BackgroundWorker createUserWorker = new BackgroundWorker();

createUserWorker.DoWork += new DoWorkEventHandler(DataWorkers.CreateUserWork);

DataWorkers.InitiateWork(sender, createUserWorker, parameters);

---

SE

---

SE

推荐答案

您不应多次启动同一BackgroundWorker实例.在循环内创建一个新实例，或者更好地启动在后台(线程池)线程上执行工作的新任务:

You should not start the same BackgroundWorker instance more than once. Create a new instance inside the loop or better yet start new tasks that perform the work on a background (thread pool) thread:

        private void CreateUserClick(object sender, RoutedEventArgs e)
        {
            for (int i = 0; i < 5; i++)
            {
                User parameters = new User
                {
                    user = UserTextBox.Text + i,
                };

                Task.Factory.StartNew(()=>
                {
                    //do your thing...
                });
            }
        }

如果您需要其他帮助，请将问题的可复制示例上载到OneDrive，并在此处发布链接.

Please upload a reproducible sample of your issue to OneDrive and post the link to it here if you need any further help.

希望有帮助.

请记住，通过将有用的帖子标记为答案来关闭话题，然后在遇到新问题时开始新话题.请不要在同一线程中问几个问题.

Please remember to close your threads by marking helpful posts as answer and then start a new thread if you have a new question. Please don't ask several questions in the same thread.

这篇关于此BackgroundWorker当前正忙，无法在循环c#中同时运行多个任务的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！