Programming Forums > Application Development > Visual Basic .NET

PhilBon · Oct 3rd, 2006, 11:12 AM

The Project that I am currently working on contains 6 different Dialog Boxes. It is the same idea of installing a program of after you've entered in certain info you go on to the next screen. I'm fine with that my problem is storing the variables in a location that wont change. I created a main class that will hold all the variables. The Problem is when ever I reference it as "Dim MainClass as New Main", it resets all the varibles, does anyone knoe how to store varibles between multiple dialogs/form windows? So When I set a variable in Form1 that in Form6 it will be what I had set it to in Form1. Thanks,

King · Oct 3rd, 2006, 1:20 PM

When you create each new form you could pass the variables to it. I am not too familiar with VB, but you probably also make a static class.

codetaino · Oct 3rd, 2006, 1:21 PM

If I understand correctly you want a variable that stays the same no matter how many times you create a new instance of the main object? If this is the case then what you need is to reasearch about what is called in other languages as static members (in vb.net Shared Members) This type of members will be the same in all the instances you create of the class. A change in one instance will affect others. an example of a declaration of a shared property could be:

(Toggle Plain Text)

Public Shared Poperty myProperty() As Integer
    Get
        Return myPopertyVar 'myPropertyVar is dlecared outside this code
    End Get
    Set(ByVal Value As Integer)
        myPropertyVar = Value
    End Set
End Property

If I mistake what you are trying to do please reply and ill try to give you a more accurate answer

-codetaino

Allensb · Oct 3rd, 2006, 1:53 PM

Quote:

I'm fine with that my problem is storing the variables in a location that wont change.

Create a module and store you variables in the module. Then you can just reference the variables by modulename.variablename..

MBirchmeier · Oct 3rd, 2006, 3:30 PM

King has two valid ways of doing this, I'd be apt to lean towards the variable passing method than the static class method, however it you're only using it for these 6 variables a static class might be the way to go.

I've seen too many projects where 'static' class variables tend to become a dumping ground for global variables without actually calling them global variables.

However, the downside to passing the information back and forth, is you actually need to keep track of it, and pass it back and forth.

-MBirchmeier

lectricpharaoh · Oct 3rd, 2006, 8:38 PM

One thing you could do is declare the instance as public, and then just reference it from the other classes. To avoid having it be a plain global, you can make each variable a property of the class. Taking this one further, you could make this public instance a public property of one class, and then each other class could access it. Properties in VB (indeed, all the .NET languages that support them) are like public variables, except each is actually accessed through a custom function, so you can provide validation and adjust other members (properties or otherwise) if one property changes.

melbolt · Oct 11th, 2006, 7:14 AM

you could raise an event and pass the data through event args.

Oct 3rd, 2006, 11:12 AM	#1
PhilBon Hobbyist Programmer Join Date: Nov 2005 Posts: 172 Rep Power: 3	Storing Variables with Multiple Dialogs/Forms The Project that I am currently working on contains 6 different Dialog Boxes. It is the same idea of installing a program of after you've entered in certain info you go on to the next screen. I'm fine with that my problem is storing the variables in a location that wont change. I created a main class that will hold all the variables. The Problem is when ever I reference it as "Dim MainClass as New Main", it resets all the varibles, does anyone knoe how to store varibles between multiple dialogs/form windows? So When I set a variable in Form1 that in Form6 it will be what I had set it to in Form1. Thanks,

Oct 3rd, 2006, 1:20 PM	#2
King Professional Programmer Join Date: Jan 2006 Location: Ontario, Canada Posts: 372 Rep Power: 0	When you create each new form you could pass the variables to it. I am not too familiar with VB, but you probably also make a static class. __________________ I am Addicted to Linux!

Oct 3rd, 2006, 1:21 PM	#3
codetaino Programmer Join Date: Jan 2005 Location: Bayamon, Puerto Rico Posts: 71 Rep Power: 4	If I understand correctly you want a variable that stays the same no matter how many times you create a new instance of the main object? If this is the case then what you need is to reasearch about what is called in other languages as static members (in vb.net Shared Members) This type of members will be the same in all the instances you create of the class. A change in one instance will affect others. an example of a declaration of a shared property could be: (Toggle Plain Text) Public Shared Poperty myProperty() As Integer Get Return myPopertyVar 'myPropertyVar is dlecared outside this code End Get Set(ByVal Value As Integer) myPropertyVar = Value End Set End Property Public Shared Poperty myProperty() As Integer Get Return myPopertyVar 'myPropertyVar is dlecared outside this code End Get Set(ByVal Value As Integer) myPropertyVar = Value End Set End Property If I mistake what you are trying to do please reply and ill try to give you a more accurate answer -codetaino __________________ "God bless u all" :)

Oct 3rd, 2006, 8:38 PM	#6
lectricpharaoh Caffeinated Neural Net Join Date: Jun 2005 Location: Dry west coast of Canada Posts: 1,010 Rep Power: 5	One thing you could do is declare the instance as public, and then just reference it from the other classes. To avoid having it be a plain global, you can make each variable a property of the class. Taking this one further, you could make this public instance a public property of one class, and then each other class could access it. Properties in VB (indeed, all the .NET languages that support them) are like public variables, except each is actually accessed through a custom function, so you can provide validation and adjust other members (properties or otherwise) if one property changes. __________________ And once again, Probability proves itself willing to sneak into a back alley and service Drama as would a copper-piece harlot. - Vaarsuvius, Order of the Stick

Oct 11th, 2006, 7:14 AM	#7
melbolt Hobbyist Programmer Join Date: Feb 2005 Location: PA, USA Posts: 237 Rep Power: 4	you could raise an event and pass the data through event args. __________________ I have never let my schooling interfere with my education. -Mark Twain- Xbox live gamertag: melbolt

Oct 3rd, 2006, 3:30 PM	#5
MBirchmeier Hobbyist Programmer Join Date: Oct 2005 Posts: 211 Rep Power: 3	King has two valid ways of doing this, I'd be apt to lean towards the variable passing method than the static class method, however it you're only using it for these 6 variables a static class might be the way to go. I've seen too many projects where 'static' class variables tend to become a dumping ground for global variables without actually calling them global variables. However, the downside to passing the information back and forth, is you actually need to keep track of it, and pass it back and forth. -MBirchmeier

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Programming Forums > Application Development > Visual Basic .NET

Storing Variables with Multiple Dialogs/Forms