BackgroundWorker 示例

Question

能否请您提供一个如何使用后台工作者的例子。我按照 asp.net 样板文档中提供的说明创建了后台工作程序。从

继承我的 class

public class ContactValidationBackgroundWorker : BackgroundWorkerBase, ITransientDependency

覆盖 Start 方法并放入非阻塞 Task.Run(MyMethod)。然后我将等待指令添加到覆盖方法 WaitToStop 中，添加像 myTask.Wait();

此方法启动，但它阻止执行工作的主要进程。我正在使用 Asp.net(样板) 核心 + Angular (SPA) 我将它添加到应用程序服务层。

Answer 1

public partial class MainWindow : Window
{
    //defining the backgroundworker
    private BackgroundWorker bgworker = new BackgroundWorker();

    public MainWindow()
    {
        InitializeComponent();
        initializeBackgroundWorker();
    }

    private void initializeBackgroundWorker()
    {
        bgworker.DoWork += MyBackgroundWorker_DoWork;
    }

    private void MyBackgroundWorker_DoWork(object sender, DoWorkEventArgs e)
    {
        //method you want to execute in the backgroundWorker
        MyMethod();
    }

    private void Mouse_Enter(object sender, MouseEventArgs e)
    {
        //call the backgroundWorker and execute it
        //This will execute the method simultaneouly with other methods 
        //without blocking the UI 

        bgworker.RunWorkerAsync();
    }

    private void MyMethod()
    {
        //your method's code
    }

}

以上代码显示了如何使用 C# 在 WPF 或 winform 应用程序中 define, initialize and execute backgroundWorker。参考代码中的行内注释，了解各部分代码的作用。

Answer 2

public class MakeInactiveUsersPassiveWorker : PeriodicBackgroundWorkerBase, ISingletonDependency
{
    private readonly IRepository<User, long> _userRepository;

    public MakeInactiveUsersPassiveWorker(AbpTimer timer, IRepository<User, long> userRepository)
        : base(timer)
    {
        _userRepository = userRepository;
        Timer.Period = 5000; //5 seconds (good for tests, but normally will be more)
    }

    [UnitOfWork]
    protected override void DoWork()
    {
        using (CurrentUnitOfWork.DisableFilter(AbpDataFilters.MayHaveTenant))
        {
            var oneMonthAgo = Clock.Now.Subtract(TimeSpan.FromDays(30));

            var inactiveUsers = _userRepository.GetAllList(u =>
                u.IsActive &&
                ((u.LastLoginTime < oneMonthAgo && u.LastLoginTime != null) || (u.CreationTime < oneMonthAgo && u.LastLoginTime == null))
                );

            foreach (var inactiveUser in inactiveUsers)
            {
                inactiveUser.IsActive = false;
                Logger.Info(inactiveUser + " made passive since he/she did not login in last 30 days.");
            }

            CurrentUnitOfWork.SaveChanges();
        }
    }
}

阅读 => https://aspnetboilerplate.com/Pages/Documents/Background-Jobs-And-Workers

BackgroundWorker 示例

BackgroundWorker example

aspnetboilerplate