Really dumb Winforms question

[Guest]

I'm sure I'm going to feel stupid when someone answers this, but what am I
doing wrong?

I have a simple form that loads a text file and displays it in a listbox
with a progress bar based on the byte size of the file. Once the display
begins, I can't move the form - it just hangs up while it's filling. Also,
if I bring another window into focus, the scrolling display stops and doesn't
come back even if I bring my form back into focus.

This is a simple form I let the forms designer set up for me. What do I
need to change to fix this?

 

[Peter Jausovec]

Hi,

You should run the "filling" in a separate thread.

 

[Morten Wennevik]

Hi,

As Peter said, you might benefit from threading.
There is a simpler, but perhaps not as elegant, way of reading x bytes
from the file, and then use Application.DoEvents() to handle any waiting
windows events like moving the listbox, then read some more, etc, in a
loop.