如何创建线程安全的GetEventHandler()？

Question

public partial class JobDataDuplicatorForm : Form
{
    public JobDataDuplicatorForm(IJobDataDuplicatorEngine engine)
    {
        _engine.CopyStartedEvent += GetEventHandler(OnCopyStarted);
        _engine.CopyEndedEvent += GetEventHandler(OnCopyEnded);
        ...
    }

    private static EventHandler GetEventHandler(Action action)
    {
        return (sender, args) => action();
    }

    private void OnCopyStarted()
    {
        copyStatus.Text = "Copy progress: ";
        generateButton.Enabled = false; // Cross-thread operation not valid
    }
}

我有以下例外：

Additional information: Cross-thread operation not valid: Control 
'generateButton' accessed from a thread other than the thread it was created on.

我可以通过更改GetEventHandler()来修复异常，而不是像这样将每个按钮包装在不同的地方

Invoke((MethodInvoker)delegate { generateButton.Enabled = false; });？

我该怎么做？

Answer 1

根据您的评论，您说您是从后台线程调用JobDataDuplicatorForm(IJobDataDuplicatorEngine engine)的。

您的类是一个Form，任何windows控件(包括表单)都必须首先在UI线程或诸如Invoke和InvokeRequired中断之类的东西上创建。无论调用什么代码，JobDataDuplicatorForm的构造函数都必须从UI线程执行该调用。