Solved

closing winform

Posted on 2009-03-30
6
413 Views
Last Modified: 2013-12-17
Can open a 2nd WinForm via the 1st main WinForm.

Created an association (ownership) between the 1st and newly opened 2nd WinForm

The scripting also checks to see if the WinForm has been opened already ... this works (appears too).

Issue is:  when closing the 2nd WinForm and then wanting to open it again I call the opening WinForm script again -- but I cannot reopen the WinForm (once closed) -- I suspect it has something to with the formBrowser  null  status.

How do I reset this parameter or get working correctly?
// WinForm #1
 
FormBrowser formBrowser;
 
 
if (formBrowser != null) return;
 
formBrowser = new FormBrowser { Owner = this };
formBrowser.Show();

Open in new window

0
Comment
Question by:amillyard
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
6 Comments
 
LVL 15

Expert Comment

by:angus_young_acdc
ID: 24018064
Have you put in a breakpoint to see if formBrowser is null?  
0
 

Author Comment

by:amillyard
ID: 24018331
angus_young_acdc:  checking the breakpoint ... null the 1st time called.  the 2nd onwards is not displayed as null, but is soft of empty !   when disposing the WinForm, it is not resetting back to null status
0
 
LVL 9

Expert Comment

by:VikramMullick
ID: 24018551
try
formBrowser.Showdialog(this)
0
Forrester Webinar: xMatters Delivers 261% ROI

Guest speaker Dean Davison, Forrester Principal Consultant, explains how a Fortune 500 communication company using xMatters found these results: Achieved a 261% ROI, Experienced $753,280 in net present value benefits over 3 years and Reduced MTTR by 91% for tier 1 incidents.

 
LVL 70

Assisted Solution

by:Éric Moreau
Éric Moreau earned 200 total points
ID: 24018561
you should check for null or IsDisposed
0
 
LVL 52

Accepted Solution

by:
Carl Tawn earned 300 total points
ID: 24018587
It won't. Closing the form will not nullify the variable that was pointing to it.

You are best to check for null, or if the form is Disposed:
        private void button1_Click(object sender, EventArgs e)
        {
            if (f == null || f.IsDisposed)
                f = new Form5();
 
            f.Show();
        }
 
        Form5 f = null;

Open in new window

0
 

Author Closing Comment

by:amillyard
ID: 31564285
carl_tawn: & emoreau:  works great now :-)   many thanks.
0

Featured Post

Why You Need a DevOps Toolchain

IT needs to deliver services with more agility and velocity. IT must roll out application features and innovations faster to keep up with customer demands, which is where a DevOps toolchain steps in. View the infographic to see why you need a DevOps toolchain.

Question has a verified solution.

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

Suggested Solutions

In my previous two articles we discussed Binary Serialization (http://www.experts-exchange.com/A_4362.html) and XML Serialization (http://www.experts-exchange.com/A_4425.html). In this article we will try to know more about SOAP (Simple Object Acces…
Today I had a very interesting conundrum that had to get solved quickly. Needless to say, it wasn't resolved quickly because when we needed it we were very rushed, but as soon as the conference call was over and I took a step back I saw the correct …
Finds all prime numbers in a range requested and places them in a public primes() array. I've demostrated a template size of 30 (2 * 3 * 5) but larger templates can be built such 210  (2 * 3 * 5 * 7) or 2310  (2 * 3 * 5 * 7 * 11). The larger templa…
Exchange organizations may use the Journaling Agent of the Transport Service to archive messages going through Exchange. However, if the Transport Service is integrated with some email content management application (such as an antispam), the admini…

739 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