后台线程更新值，在非 UI 线程上调用 OnPropertyChanged，因此出现错误 [重复]

Question

我在后台线程更新值，在后台线程调用 OnPropertyChanged，所以更新 ui 出错 我可以使用 CheckForIllegalCrossThreadCalls = false; 但是有没有更好的方法来解决这个问题？

public partial class Form1 : Form
{        
    public Form1()
    {
        InitializeComponent();

        label1.DataBindings.Add("Text", a, "Count");
    }

    AAA a = new AAA();

    private void button1_Click(object sender, EventArgs e)
    {
        Task.Run(() => { a.Count++; }); //get error
        //a.Count++;   this ok
    }
}

class AAA : INotifyPropertyChanged
{
    private int count;
    public int Count
    {
        get => count;
        set
        {
            if (value == count) 
                return;

            count = value;
            OnPropertyChanged();
        }
    }

    public event PropertyChangedEventHandler PropertyChanged;

    [NotifyPropertyChangedInvocator]
    protected virtual void OnPropertyChanged([CallerMemberName] string propertyName = null)
    {
        PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(propertyName));
    }
}

Answer 1

解决方案应该是这样的（未测试）：

private readonly SynchronizationContext _syncContext = SynchronizationContext.Current;

private void button1_Click(object sender, EventArgs e)
{
    Task.Run(() => { 
        _syncContext.Post(() => {
            a.Count++;
        }); 
    }); //get error
}