Accessing varibles across forms.

draco_iii

I have a varible that is declared in the main application form as public. How can I get at this varible from another form. I have tried accessing the forms varible via Form1.varible and this.ParentForm.varible and so forth. All to no avail and I need to have access to this varible from anywhere in the program. Any suggesttion would be greatly appreciated.

leppie

DId you cast it (the form) to your form before you tried to access it? draco_iii wrote: All to no avail and I need to have access to this varible from anywhere in the program. I suggest making a "static" class then to hold these variables. MyDUMeter: a .NET DUMeter clone
"Thats like saying "hahahaha he doesnt know the difference between a cyberneticradioactivenuclothermolopticdimswitch and a biocontainingspherogramotron", but with words you have really never heard of."

Stephane Rodriguez

this.ParentForm returns a System.Windows.Forms.Form class type, not your derived class. In fact, this.ParentForm is mostly used for UI logic. For your application logic, it's better to either let the two forms know about each other existence or, better, share a property bag class (better in terms of decoupling).

Omega501

I'm not sure if this is the correct way of doing things, but I have been able to access properties and function in parent/child forms like this.

// in ParentForm parent
ChildForm child = new ChildForm();
child.Owner = this;
// access custom property or function in the child form
((ChildForm)child).PublicProperty = MyVal;
// show the child form

Then you can access the parents public properties like this

// in ChildForm child
((ParentForm)Owner).PublicProperty = MyVal;
((ParentForm)Owner).PublicFunction();

I know that this works, but is it the correct way of doing things? And if there is a better way of this, any example code on this?

draco_iii

How do you go about letting them know about each others existance or at least letting the child forms see full existance of the main running form? I need to be able keep one set of the varibles not multiple instances so that they can be written to or read from by any of the child forms. Doing so, would allow less overhead and insure that all of the child forms are working from the same set of "settings".

draco_iii

Made the static class for the variable it look like this using System; using Perpetual_Settings; namespace Brazen_Mail { /// /// Summary description for Setting. /// public class Setting { public static Perpetual_Settings.PerpetualSettings test = new PerpetualSettings(); static Setting() { test = new PerpetualSettings(); } } }

But when running the code I get this error.

An unhandled exception of type 'System.IO.FileNotFoundException' occurred in system.windows.forms.dll

Additional information: File or assembly name Perpetual Settings, or one of its dependencies, was not found.

I can see the Properties and Methods from the class when trying access them via VS, but it craps out when I try and run the program.

leppie

Spaces in general is a BAD idea spawned from some VB coders on crack. NEVER use spaces. I assume your dll is called "Perpetual Settings.dll". Spaces are used to space code elements, not making pretty names. MyDUMeter: a .NET DUMeter clone
"Thats like saying "hahahaha he doesnt know the difference between a cyberneticradioactivenuclothermolopticdimswitch and a biocontainingspherogramotron", but with words you have really never heard of."

draco_iii

Thanks. As soon as I got the space out of the name it worked perfectly. There needs to be a an article about making a static varible class. It is the best way I have seen to have global varibles.