Global Variables N00BIE Help!

Hi Guys,

So I'm still very new to C# and I'm currently making a forms application in Visual Studio 2013. I have a program that will display 30 DVD's to a user and the user can add them to a wish list and then there are admin controls too. I have a DVD class and an INVENTORY class. The Inventory class holds a List of the DVD objects.

The problem I have is that I would like to be able to access the classes I have made and used in form1, from other forms without needing to save and load to a file. I have tried making the objects global like this:

namespace Summer_Homework

{

public partial class Form1 : Form

{

//Global Variables

public DVD DVDCurrent = new DVD();

public INVENTORY Inventory = new INVENTORY();

public Form1()

{

InitializeComponent();

}

But it has not worked. What I would like to know is what is the proper way to pass variables between forms?

Any help/input would be very much appreciated.

Many Thanks and Kind Regards,

James Webb

2 Replies

Know the answer? Post it — somebody with the same question will find it here.

James Webb12y ago
Thanks Very Much!
Vulpes12y ago
Just make the global variables static.

The other forms won't then need a reference to the Form1 instance to access them:

namespace Summer_Homework
{
public partial class Form1 : Form
{

//Global Variables
public static DVD DVDCurrent = new DVD();
public static INVENTORY Inventory = new INVENTORY();

public Form1()
{
InitializeComponent();
}

// etc

}

To access them from another form you can now just precede them with the class name:

DVD dvd = Form1.DVDCurrent;
INVENTORY inv = Form1.Inventory;