Global variables

Rowie

I got a question about variables in C#.

I am trying to save a variable in a different class. I use Add --> New Item --> Class (So it is a complete new class where I want to save my variables I need to use throughout my project). I use getters and setters to save them.

I call the class in Form1 by using: private GlobalVars globalVars = new GlobalVars();

Now when I press a button a new Form appears where I use the same statement else I can't access the class. But when
I try to access a variable by using e.g: globalVars.intClient.toString(); I always get 0. The variables have been reset.

How can I solve this problem ??

4 Replies

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Jaish Mathews16y ago
Accepted answer
Hi,
With your code it is not possible because
1. public partial class Form1 : Form
  {
  private Class classe = new Class();
  Above code meant that you are creating a copy of class named "Class" which can use only inside class "Form1". It's not accessible to any other class
2. public partial class Form2 : Form
  {
  private Class classe = new Class();
  Above code meant that you are creating a copy of class named "Class" which can use only inside class "Form2". It's not accessible to any other class
So you have 2 copies of the class "Class", one inside "Form1" and another inside "Form2". The code "classe.intClient = 4" only applied to the copy of "Form1" not in side the copy of "Form2". So "Form2" can't access "classe.intClient = 4". If you need to access it globally, do like below.
Redefine "Class" LIke Below
class Class
    {
        public static int intClient
        {
            get;
            set;
        }
    }

Set The Above Property Any Where Liek Below
Class.intClient = 4
Rowie16y ago
Thank you, it worked.

I also had to change: classe.intClient = 4; to Class.intClient = 4;
Else I got an error.
Rowie16y ago
I will explain a bit better:

I got 3 files:
- Form1.cs <-- Form
- Form2.cs <-- Form
- GlobalVars.cs <-- Class

Form1 looks like:
public partial class Form1 : Form
    {
        private Class classe = new Class();

        public Form1()
        {
            InitializeComponent();
        }

        private void button1_Click(object sender, EventArgs e)
        {
            classe.intClient = 4;
            Form2 form          = new Form2();
            form.Show();
        }
    }

Form2 looks like:
public partial class Form2 : Form
    {
        private Class classe = new Class();
        public Form2()
        {
            InitializeComponent();
            MessageBox.Show(classe.intClient.ToString());
        }
    }

Class.cs looks like:
class Class
    {
        public int intClient
        {
            get;
            set;
        }
    }

Now when I press the button on form 1 I set a value in class.cs. The messagebox.show() gives 0 as output. I want it to output 4 since I have set that on Form1.
Mahesh Chand16y ago
I am assuming these variable values are fixed. Create a static class with static members and you can access them anywhere.