Question

I have following code:

for(int I=0;I<10;I++) 
{  
 graphics.DrawImage(image, i*20,50);  
 invalidate(); 
}

But it redrawns just after the loop. Why?

EDIT: I am making simple movement and wants to update after each step.

Answer 1

Because Invalidate does not repaint immediately, it just tells that a repaint is needed. When the method is completed, and the program is idle again, the repaint will be performed.

The quick and dirty solution is to add Application.DoEvents() after the Invalidate call, but I would suggest rewriting the logic to use a timer or something similar instead of using the loop to animate.