Solved

Hanging on frm.show when the business object contains a collection w/ > 5000 objects

Posted on 2004-08-05
3
200 Views
Last Modified: 2010-04-23
The following roughly describes the sequence of events:

- mdi menu click event asks the business tier to populate an object

- parent business object calls the database and populates itself.  This includes a collection of 5000 child objects.  While debugging I can see that this successfully completes

- control returns to the MDI form where it Dims a windows form

- the windows form is successfully given a reference to the business object

- frm.Show is called

Execution in the debugger runs as expected until frm.show is called.  At this point execution hangs, CPU usage redlines, the form never appears, and I eventually stop the debugging (or, if I am running without the debugger, I must kill the program).  I can successfully load the form when I have only 1000 child objects.  Why would 5000 cause this failure... out-of-memory comes to mind, but why would it not fail while the 5000 objects are being created?  Furthermore, 5000 hardly feels like a "scary" number!

Thank you in advance for pointing me into the right direction to uncover my error!
0
Comment
Question by:bmccleskey
  • 2
3 Comments
 
LVL 37

Accepted Solution

by:
gregoryyoung earned 250 total points
ID: 11731932
what is the form doing on its load with the collection ?
0
 

Author Comment

by:bmccleskey
ID: 11732333
You pointed me into the right direction, and it was a silly mistake on my part.  I had assumed that execution was not making it into the form load event, so I didn't have a breakpoint set within the "being created" form.  Once I set the breakpoint and stepped into the form_load event, the bug in my looping logic was easy to spot.

A million thanks.
0
 
LVL 37

Expert Comment

by:gregoryyoung
ID: 11732336
glad you got it.
0

Featured Post

Is Your AD Toolbox Looking More Like a Toybox?

Managing Active Directory can get complicated.  Often, the native tools for managing AD are just not up to the task.  The largest Active Directory installations in the world have relied on one tool to manage their day-to-day administration tasks: Hyena. Start your trial today.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

1.0 - Introduction Converting Visual Basic 6.0 (VB6) to Visual Basic 2008+ (VB.NET). If ever there was a subject full of murkiness and bad decisions, it is this one!   The first problem seems to be that people considering this task of converting…
It was really hard time for me to get the understanding of Delegates in C#. I went through many websites and articles but I found them very clumsy. After going through those sites, I noted down the points in a easy way so here I am sharing that unde…
Along with being a a promotional video for my three-day Annielytics Dashboard Seminor, this Micro Tutorial is an intro to Google Analytics API data.
Although Jacob Bernoulli (1654-1705) has been credited as the creator of "Binomial Distribution Table", Gottfried Leibniz (1646-1716) did his dissertation on the subject in 1666; Leibniz you may recall is the co-inventor of "Calculus" and beat Isaac…

770 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question