C# forms Processing multiple things

Question

I have some pictureboxes in the form in a List. I want them to update their position and still being able to drag the object while updating the others.

I'm doing and infinitive while loop the keep updating their positions:

while (true)
{
    Random rnd = new Random();

    pictures[0].Location = new Point(pictures[0].Location.X - rnd.Next(-2, 3), pictures[0].Location.Y + rnd.Next(0, 2));
    pictures[1].Location = new Point(pictures[1].Location.X, pictures[1].Location.Y + 1);
    this.Update();
}

The problem is that I've made this elements draggable, but the MouseDown event is not being called. Because of the infinity loop I guess, but how can I fix that ?

You have to take care when modifying UI elements from within a thread (JonasH sugested a Timer, which is also good), or you will get an exception... — Wolfgang Roth
– Wolfgang Roth, Commented Jan 13, 2021 at 11:59

JonasH · Accepted Answer · 2021-01-13 11:55:41Z

3

You should use a timer. Set it to trigger however often you want to update the positions. This lets the main thread process other events, while updating your animation as often as needed.

How to create a timer:

   myTimer = new System.Windows.Forms.Timer();
   myTimer.Tick += TimerEventProcessor;

   // Sets the timer interval to 0.5 seconds.
   myTimer.Interval = 500;
   myTimer.Start();

and

private void TimerEventProcessor(Object myObject,
                                        EventArgs myEventArgs) {
// Your update code here
}

answered Jan 13, 2021 at 11:55

JonasH

38.4k2 gold badges15 silver badges31 bronze badges

Sign up to request clarification or add additional context in comments.

Collectives™ on Stack Overflow

C# forms Processing multiple things

1 Answer 1

Comments

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

Comments

Related