在c#中更改超时按钮的文本

Question

如何在超时时更改按钮文本？我尝试使用以下代码,但它无法正常工作.

private void button1_Click(object sender, EventArgs e)
{
    Stopwatch sw = new Stopwatch();
    sw.Start();
    if (button1.Text == "Start")
    {
        //do something
        button1.Text = "stop"
        if (sw.ElapsedMilliseconds > 5000)
        {
            button1.Text = "Start";

        }
    }

我该如何更正我的代码？

Answer 1

您需要使用Timer:

Timer t = new Timer(5000); // Set up the timer to trigger on 5 seconds
t.SynchronizingObject = this; // Set the timer event to run on the same thread as the current class, i.e. the UI
t.AutoReset = false; // Only execute the event once
t.Elapsed += new ElapsedEventHandler(t_Elapsed); // Add an event handler to the timer
t.Enabled = true; // Starts the timer

// Once 5 seconds has elapsed, your method will be called
void t_Elapsed(object sender, ElapsedEventArgs e)
{
    // The Timer class automatically runs this on the UI thread
    button1.Text = "Start";
}

秒表仅用于测量自调用Start()以来经过的时间.