Geek asks and answers

.NET Invoke Process Flow

I see / use some form or code mode all the time:

public void method1(Object sender, EventArgs args)
{
  if(dataGridView1.InvokeRequired)
    dataGridView1.Invoke(new EventHandler(method1), null);
  else
    // Do something to dataGridView1
}

My question is: what happens to the GUI thread when I use Invoke? This is like an interrupt, where will the thread immediately go and execute method1?

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2 answers

It's like an interruption ...

No, absolutely not. There is a safe way to interrupt a thread when it is busy executing code. This causes a particularly unpleasant type of problem called a "re-login error." This is a mistake that firmware programmers struggle with when they implement interrupt handlers on embedded systems. Some information on this in this web page .

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: method1 ( GUI). :

public void method1(Object sender, EventArgs args)
{
  if(dataGridView1.InvokeRequired)
    method1();
  else
    // Do something to dataGridView1
}

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