Solved

How to tell if a variable contains an object

Posted on 2006-06-15
2
212 Views
Last Modified: 2012-05-05
I've created a form and stored it in a variable, however i need to be able to tell if the form has already been created and stored so that i don't do it again.

How do i do it? There used to be IsObject in VB6.
0
Comment
Question by:James_Wyatt
[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
2 Comments
 
LVL 18

Accepted Solution

by:
Ravi Singh earned 50 total points
ID: 16912196
When a variable isnt referencing anything its usually just a null, have you tried comparing against the null?

if (FormObject == null)
      //FormObject not initialised
else
     //FormObject was initialised
0
 
LVL 1

Author Comment

by:James_Wyatt
ID: 16912471
Cheers i narrowed it down to

if (myResults == null || myResults.IsDisposed)

had to add is disposed incase someone had closed the form.
0

Featured Post

Industry Leaders: We Want Your Opinion!

We value your feedback.

Take our survey and automatically be enter to win anyone of the following:
Yeti Cooler, Amazon eGift Card, and Movie eGift Card!

Question has a verified solution.

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

Introduction Hi all and welcome to my first article on Experts Exchange. A while ago, someone asked me if i could do some tutorials on object oriented programming. I decided to do them on C#. Now you may ask me, why's that? Well, one of the re…
Entity Framework is a powerful tool to help you interact with the DataBase but still doesn't help much when we have a Stored Procedure that returns more than one resultset. The solution takes some of out-of-the-box thinking; read on!
Come and listen to Percona CEO Peter Zaitsev discuss what’s new in Percona open source software, including Percona Server for MySQL (https://www.percona.com/software/mysql-database/percona-server) and MongoDB (https://www.percona.com/software/mongo-…
In this video we outline the Physical Segments view of NetCrunch network monitor. By following this brief how-to video, you will be able to learn how NetCrunch visualizes your network, how granular is the information collected, as well as where to f…

728 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