Illegal Cross Thread Operation error

Question

Possible Duplicate:
Help needed for 'cross-thread operation error' in C#
Solve a cross-threading Exception in WinForms

I've tried to add progressbar in the foreach-loop

private void backgroundWorker1_DoWork(object sender, DoWorkEventArgs e)
{
    foreach (...)
    {
        ...
        i++;
        backgroundWorker1.ReportProgress(100 * i / rcount);
        Thread.Sleep(100);
    }
    this.close();
}

now i have an Illegal Cross Thread Operation error in this.close(); line

How can i solve it?

Take a look here: http://stackoverflow.com/questions/5868783/solve-a-cross-threading-exception-in-winforms — Nick Spreitzer, Sep 02 '12 at 18:19
There are hundreds, maybe even thousands of questions on SO about the same error. How many did you read before posting? — H H, Sep 02 '12 at 18:20

score 2 · Answer 1 · edited May 23 '17 at 12:04

2

Run the command in the ui thread:

How to update the GUI from another thread in C#?

this.Invoke((MethodInvoker)delegate {
    this.close();
});

edited May 23 '17 at 12:04

Community

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1

answered Sep 02 '12 at 18:20

Petar Minchev

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Possible but the Completed event is so much more appropriate. – H H Sep 02 '12 at 18:33

Illegal Cross Thread Operation error

1 Answers1