使用计时器和2个按钮进行跨线程操作无效 [英] Cross-thread operation not valid using timer and 2 buttons

问题描述

我遇到了这个问题...

i got this problem...

对此有什么好的解决方案?

What would be a good solution for this?

 private void button1_Click(object sender, EventArgs e)
    {
        aTimer.Enabled = true;
        button1.Enabled = false;

    }

    private void button2_Click(object sender, EventArgs e)
    {
        aTimer.Enabled = false;
    }

    private void timer_is_working(object source, ElapsedEventArgs e)
    {
        aTimer.Enabled = false;
        button1.Enabled = true;
    }

谢谢！亲切的问候丹尼尔·鲁舍(Daniel Ruescher)

Thanks! Kind regards Daniel Ruescher

推荐答案

所以您不清楚，但是根据 ElapsedEventArgs 类型，看来 timer_is_working 是 System.Timers.Timer 实例的 Elapsed 事件.

So you did not make it clear, but based on the ElapsedEventArgs type it seems that timer_is_working is the Elapsed event of a System.Timers.Timer instance.

请注意，.NET Framework类库包括四个类名为Timer的计时器，每个计时器提供不同的功能:

Be aware that the .NET Framework Class Library includes four classes named Timer, each of which offers different functionality:

• System.Timers.Timer:定期触发一个事件.该类旨在用作基于服务器或服务的多线程环境中的组件.
• System.Threading.Timer:定期在线程池线程上执行单个回调方法.回调方法是在计时器实例化且无法更改时定义.喜欢System.Timers.Timer类，该类旨在用作多线程环境中基于服务器或服务的组件.
• System.Windows.Forms.Timer:一个Windows Forms组件，该组件定期触发事件.该组件设计用于单线程环境.
• System.Web.UI.Timer:一个ASP.NET组件，该组件定期执行异步或同步网页回发.

如果这是Windows.Forms应用程序，请改用 System.Windows.Forms.Timer (可在工具箱/组件"中找到).其 Tick 事件在UI线程中引发，因此可以从那里访问您的控件.

If this is a Windows.Forms app, use a System.Windows.Forms.Timer instead (you find it in Toolbox/Components). Its Tick event is raised in the UI thread so can access your controls from there.

如果出于特殊原因需要使用 System.Timers.Timer (例如，精度)，则必须将访问权限包装为 Invoke 调用:

If you have a special reason to use the System.Timers.Timer (eg. precision), you must wrap your access into an Invoke call:

Invoke(new Action(() => { button1.Enabled = true; }));

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