Kevin,
The application starts with a login form. If the login is correct I
want
the user to see the Main form, which is the code snippet I provided.
Now,
I've taken a screenshot to give you an idea of what I'm happens...
http://www.flickr.com/photos/21415710@N00/263834581/
This happens using the standard code (so before adding double buffer
stuff,
resumelayout and such).
The app starts like that and taken about 1-2 seconds before it becomes
fully
drawn. What I want now, is basically that when the form shows,
everything
is
already drawn. So I want to move those 1-2 seconds to the background,
so
that the user doesn't see the form being drawn.
This kind of behaviour is also the thing I get when I put in that
Thread.Sleep part. It draws something like you see in the screenshot,
then
sleeps for 10 seconds and then draws the rest of the form.
:
I don't know the context of your code, or what you expect in terms of
behavior. You seem to instantiating a form with a class name Main
somewhere
in your code, but I can't tell where (is this the main Form of the
app?).
Calling SuspendLayout will not speed up the initialization of any
Controls,
but prevents Layout logic from being executed during their
initialization.
In addition, the InitializeComponent method of the Form calls
SuspendLayout,
ResumeLayout, and PerformLayout on the Form. You're calling
SuspendLayout
on
the Form prior to calling InitializeComponent, and ResumeLayout after.
SuspendLayout can be called multiple times in succession, but if the
count
of SuspendLayout calls is greater than 0, ResumeLayout will not
execute
properly (resuming layout). Also, the PerformLayout call will not
raise a
Layout event. So, I'm not at all sure how your code would play out.
See
http://msdn2.microsoft.com/en-us/library/system.windows.forms.control.suspendlayout.aspx
for further details.
--
HTH,
Kevin Spencer
Microsoft MVP
Computer Control Freak
http://unclechutney.blogspot.com
A man, a plan, a canal, a palindrome that has.. oh, never mind.
Hi Kevin,
I'm still not getting there. Putting in SuspendLayout/ResumeLayout
doesn't
change anything. Am I doing something wrong ? I tried putting it in
different places (see code below)
Main frmMain = new Main(1, 1);
frmMain.SuspendLayout();
frmMain.Show();
frmMain.ResumeLayout();
-or-
public Main(int gebruiker, int rol)
{
SuspendLayout();
InitializeComponent();
this.gebruiker = gebruiker;
this.rol = rol;
splitContainer2.Panel2.Controls.Clear();
Vondeling fr = new Vondeling();
splitContainer2.Panel2.Controls.Add(fr);
splitContainer2.Panel2.Controls[0].Dock = DockStyle.Fill;
ResumeLayout();
}
As for threading : the fact that it's single threaded is the part
that
I
don't get. If it's single treaded, shouldn't the form be drawn
completely
before the code gets to the sleeping part ?
:
What's going on is, you're putting the main execution thread to
sleep,
thus
delaying any execution of code for 10 seconds. A Windows Form is a
STA
(Single Threaded Apartment) application. There is only one
execution
thread.
Call SuspendLayout() on the Form while loading the Controls. When
they
are
loaded, call ResumeLayout(). This prevents the Form from repainting
until
all of the Controls are loaded.
--
HTH,
Kevin Spencer
Microsoft MVP
Software Composer
http://unclechutney.blogspot.com
A man, a plan, a canal, a palindrome that has.. oh, never mind.
When I show a form composed of some 20 controls, including one
complicated
control, it takes about 2 seconds from the moment of form.show()
to
the
point
where everything is drawn. What can I do so that this doesn't
happen,
or
that I at least hide it from the users ? I've tried double
buffering
but
this doesn't seem to work. (There is also no code in the form
except
for
the
constructor of the form.)
What I've also found is, when I call form.show and then follow by
a
Thread.Sleep, it will draw a couple of controls and then wait for
the
Thread.Sleep to draw the rest of the controls. (see code below)
What's
going
on here ?
Main frmMain = new Main(1, 1);
frmMain.Show();
Thread.Sleep(10000);
