MDI Access

I have an MDI application

Within my parent I have the following for storing application wide data:

public string test;

I want to be able to read and write this from within a child form but this isn't visible to the child form when I try:

this.MdiParent.test = "xxx";

Any ideas how to get this to work?

Thanks

Dave
LVL 19
daveamourAsked:
Who is Participating?

[Product update] Infrastructure Analysis Tool is now available with Business Accounts.Learn More

x
I wear a lot of hats...

"The solutions and answers provided on Experts Exchange have been extremely helpful to me over the last few years. I wear a lot of hats - Developer, Database Administrator, Help Desk, etc., so I know a lot of things but not a lot about one thing. Experts Exchange gives me answers from people who do know a lot about one thing, in a easy to use platform." -Todd S.

TheAvengerCommented:
You should cast the parent to your form type. Let's say the

public string test;

is in a class called MainForm. Then this will work:

((MainForm)this.MdiParent).test = "xxx";

Experts Exchange Solution brought to you by

Your issues matter to us.

Facing a tech roadblock? Get the help and guidance you need from experienced professionals who care. Ask your question anytime, anywhere, with no hassle.

Start your 7-day free trial
daveamourAuthor Commented:
Ok that works great, would I be opening a can of worms if I asked why you had to cast?

Thanks

Dave
TheAvengerCommented:
Because the MdiParent is of type Form and you included your variable in the type MainForm. C# is stricktly prohibiting the usage of not clearly declared members/methods so you have to tell it what exactly the type is
Introduction to Web Design

Develop a strong foundation and understanding of web design by learning HTML, CSS, and additional tools to help you develop your own website.

daveamourAuthor Commented:
Ok I see, would have made more sense for .net to figure out what type the parent is for itself.

Thanks

Dave
TheAvengerCommented:
Not possible during design time because you can change it whenever you want....
daveamourAuthor Commented:
Good point
It's more than this solution.Get answers and train to solve all your tech problems - anytime, anywhere.Try it for free Edge Out The Competitionfor your dream job with proven skills and certifications.Get started today Stand Outas the employee with proven skills.Start learning today for free Move Your Career Forwardwith certification training in the latest technologies.Start your trial today
C#

From novice to tech pro — start learning today.