I'm working on Windows Form VB 2005 project.
Most of my forms have many controls including Infragistics.
Even without data objects (commands, dataadapters etc.) forms take some
visible time (1-2 sec) to appear on the screen. With data it takes even
more - 4-6 seconds.
The appearance process goes pretty bad - some controls appear (not entire
form) first within first 2 seconds, some parts of the previous form is still
on the screen, then within 3-4 second remaining stuff appears.
It looks on the screen pretty bad.
I tried SuspendLayout, I tried to move at least data stuff to different
events. Nothing helps. I still have a garbage on the screen within several
seconds.
I cannot decrease the number of controls on forms because VB 6 application
with the same features exists and works fine. My goal is to move everything
to VB 2005 without losing any functionality and without significant changes
of user interfaces.

Any advice how to display the form clearly?

Thanks
Al

Show quote Hide quote Impossible to tell what the problem is without seeing code:

1)  My experiences with 3rd party controls - ActiveX versions form VB6 days, although supported in
NET, generally suffer from performance issues.  Are you using an older Infragistics ActiveX version,
or, the latest and greatest Infragistics NET component for framework 2.0?

2) Are you trying to essentially "convert" the VB6 app?  You likely won't get the performance
results you are looking for short of rewritting the application from the ground up as a pure NET
application.

Gene

As I said before even without any code written by me the problem occurs.
With data accessing code it just becomes more visible.
I made some screenshots (See an attachment). It's hard to catch the moment
with a garbage on the screen when there is no data code, so I used the form
with data access codes just to display the garbage for longer time.
There is a limit with the size of attachment in news groups, so I make 3
replies just to show 3 screen shot.

I'm using the latest Infragistics stuff for .NET. In the previous version
(VB6 project) I used Sheridan ActiveX controls.

No, I'm not converting VB6 application. I'm using the list of
functionalities and trying to create a new VB 2005 project with similar for
the end user screen. Inside they are absolutely different from the VB6
screens. Different data access (ADO.NET instead of ADO) and of course
different set of controls and other objects.

The attachment shows the garbage when an inicial screen appears for the
first time. No other forms was displayed before.

In the next 2 messages I'll show the same screen when it appears after some
other form and final appearance when no garbage on the screen anymore.

Thank you
Al

[attached file: 1.jpg]

Attachment shows the garbage when the form appears after another form

[attached file: 2.jpg]

Attachment shows the form after everything was loaded and garbage has gone

[attached file: 3.jpg]

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