Cross-thread operation not valid in static method

Question

I have the following code in my WinForms C# app:-

private static void displayTime(object source, ElapsedEventArgs e)
{
    timer++;
    timeTxtBox.Text = parseTime(timer);
}

This is throwing an InvalidOperationException with the message, with the details

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

How would I make this work?

Hint: It's not because the method is static. It's because you are calling this method on a different thread. — mbeckish, Feb 01 '14 at 04:49
You need to invoke the change on a control that only exists in another thread. — Security Hound, Feb 01 '14 at 05:04

score 1 · Answer 1 · answered Feb 01 '14 at 05:09

1

Try this:

private static void displayTime(object source, ElapsedEventArgs e)
{ 
    timeTxtBox.Invoke(new Action(() => 
    {
    timer++;
    timeTxtBox.Text = parseTime(timer);
    }));
}

answered Feb 01 '14 at 05:09

Behrad Farsi

1,102
13
25

Cross-thread operation not valid in static method

1 Answers1