如何从在该对象的方法代码中启动的 BackgroundWorker 正确更新对象的属性？

Question

如果标题清楚，现在不要。下面是负责管理长操作的类的一段代码：

public class LongProcess
{
    public delegate void RunningChangedEventHandler(bool running);

    public event RunningChangedEventHandler RunningChanged;

    private object runningLock = new object();
    public bool Running
    {
        get { lock (runningLock) { return mRunning; } }
        set
        {
            lock (runningLock)
            {
                RunningChanged.Invoke(value);
                value = mRunning;
            }
        }
    }

    public void start()
    {
        mWorker = new BackgroundWorker();
        mWorker.DoWork += Bg_DoWork;
        mWorker.RunWorkerAsync();
    }

    private void Bg_DoWork(object sender, DoWorkEventArgs e)
    {
        Running = true;
        // Some things to do here ... but I need Running to be equals to true and it is not
    }
}

在主程序中，我使用 LongProcess 来启动一些任务，它是通过报告进度等来完成的......

我面临的唯一问题是，我似乎无法将“正在运行”设置为 true。即使在调用 setter 之后，它仍然保持其旧值。

任何有关其工作原理的帮助和解释将不胜感激！

Answer 1

你在 setter 中有错误的值和字段。你需要这个：

public bool Running
{
    get { lock (runningLock) { return mRunning; } }
    set
    {
        lock (runningLock)
        {
            RunningChanged.Invoke(value);
            mRunning = value; // <=== LOOK HERE
        }
    }
}