Question

I am trying to place a value (from an object) in a variable and place it in a textbox in a form.

Here is the form code:

public Form1(Deck mainDeck)
    {
        InitializeComponent();
        int Val = mainDeck.ReturnCard(10);
        textBox1.Text = Val.ToString();
    }

mainDeck is an object in my Program.cs file

The problem line is this one: int Val = mainDeck.ReturnCard(10);

Oops, wrong error.
This is the real one:

Error 1 The name 'mainDeck' does not exist in the current context C:\Users\Chris\Documents\Visual Studio 2008\Projects\Pcard\Pcard\Form1.cs 17 23 Pcard

Here is my Program.cs file:

using System;
using System.Collections.Generic;
using System.Linq;
using System.Windows.Forms;

namespace Pcard
{
    class Deck
    {
        public Deck()
        {
            // Assign standard deck to new deck object
            //   int j;
            for (int i = 0; i != currentDeck.Length; i++)
            {
                currentDeck[i] = originalCards[i];
            }
            // Fisher-Yates Shuffling Algorithim    ---   Do initial shuffle
            Random rnd = new Random();

            for (int k = currentDeck.Length - 1; k >= 0; k--)
            {
                int r = rnd.Next(0, k + 1);

                int tmp = currentDeck[k];
                currentDeck[k] = currentDeck[r];
                currentDeck[r] = tmp;
            }
        }
        public void Shuffle()
        {
            Random rnd = new Random();

            for (int k = currentDeck.Length - 1; k >= 0; k--)
            {
                int r = rnd.Next(0, k + 1);

                int tmp = currentDeck[k];
                currentDeck[k] = currentDeck[r];
                currentDeck[r] = tmp;
            }
        }
        public int[] ReturnDeck()
        {
            return currentDeck;
        }
        public int ReturnCard(int num)
        {
            return currentDeck[num];
        }

        public int[] originalCards = new int[54]
        {
            0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17, 0x18, 0x19, 0x1A, 0x1B, 0x1C, 0x1D,
            0x21, 0x22, 0x23, 0x24, 0x25, 0x26, 0x27, 0x28, 0x29, 0x2A, 0x2B, 0x2C, 0x2D,
            0x31, 0x32, 0x33, 0x34, 0x35, 0x36, 0x37, 0x38, 0x39, 0x3A, 0x3B, 0x3C, 0x3D,
            0x41, 0x42, 0x43, 0x44, 0x45, 0x46, 0x47, 0x48, 0x49, 0x4A, 0x4B, 0x4C, 0x4D,
            0x50, 0x51
        };
        private int[] currentDeck = new int[54];

    }
   public class Program
    {
        static void Main(string[] args)
        {
            // Create a Deck object
            Deck mainDeck = new Deck();
            Console.WriteLine("Here is the card array:");
            for (int index = 0; index != 54; index++)
            {
                string card = mainDeck.ReturnCard(index).ToString("x");
                Console.WriteLine("0x" + card);
            }
            //Return 10th Card
            int PickCard = mainDeck.ReturnCard(10);
            Console.WriteLine("Here is the 10th Card");
            Console.WriteLine("0x" + PickCard);
            //Shuffle
            mainDeck.Shuffle();
            Console.WriteLine("Shuffling..");
            PickCard = mainDeck.ReturnCard(10);
            Console.WriteLine("Here is the 10th card now: 0x" + PickCard);
            Application.Run(new Form1(maindeck));
        }
    }
}

Edit: Okay, I am passing mainDeck to the Form, but I am now getting a different error:
Error 1 Inconsistent accessibility: parameter type 'Pcard.Deck' is less accessible than method 'Pcard.Form1.Form1(Pcard.Deck)' C:\Users\Chris\Documents\Visual Studio 2008\Projects\Pcard\Pcard\Form1.cs 14 16 Pcard

Edit: Edit: Alright, I now have this working, but I ran into a related problem, so I would rather put it here than in a new question.

Passing mainDeck to the Form1 works fine, but what about if I want to have a button click call a method in this object. I tried passing mainDeck like this:

 private void button1_Click(object sender, Deck mainDeck, EventArgs e)
        {
            mainDeck.Shuffle();
        }

I get this error:
Error 1 No overload for 'button1_Click' matches delegate 'System.EventHandler' C:\Users\Chris\Documents\Visual Studio 2008\Projects\Pcard\Pcard\Form1.Designer.cs 51 35 Pcard

GRR!

Answer 1

The line
Deck mainDeck = new Deck();
just creates a local variable with name mainDeck… Which is accessible only in the Main() Method…

Place the Declaration above the Main method in the class… Make the program class public and the maindeck as public static… like this

public class Program 
{ 
       // Create a Deck object 
   public static Deck mainDeck = new Deck(); 
    static void Main(string[] args) 
   { 
     .....

   }

Then you can access from your Form as

 int Val = Program.mainDeck.ReturnCard(10);

Hope this helps.