Solved

How to tell if a variable contains an object

Posted on 2006-06-15
2
209 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
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

Free Tool: Postgres Monitoring System

A PHP and Perl based system to collect and display usage statistics from PostgreSQL databases.

One of a set of tools we are providing to everyone as a way of saying thank you for being a part of the community.

Question has a verified solution.

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

Article by: Najam
Having new technologies does not mean they will completely replace old components.  Recently I had to create WCF that will be called by VB6 component.  Here I will describe what steps one should follow while doing so, please feel free to post any qu…
This article describes a simple method to resize a control at runtime.  It includes ready-to-use source code and a complete sample demonstration application.  We'll also talk about C# Extension Methods. Introduction In one of my applications…
Two types of users will appreciate AOMEI Backupper Pro: 1 - Those with PCIe drives (and haven't found cloning software that works on them). 2 - Those who want a fast clone of their boot drive (no re-boots needed) and it can clone your drive wh…
Established in 1997, Technology Architects has become one of the most reputable technology solutions companies in the country. TA have been providing businesses with cost effective state-of-the-art solutions and unparalleled service that is designed…

791 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