Sending data between Windows Forms

[RavonTUS]

Greetings,

I have two tabs open in Visual C# Express. The first is my Forms1.cs and it has my form with several "CheckBox"'s in it. The second tabs has my "code" in it.

In my form I have the following and it works...

        private void checkBoxMDF_CheckedChanged(object sender, EventArgs e)
        {
            MessageBox.Show("For a small fee, we will add this feature to the program.  :) ");
            if (checkBoxMDF.Checked)
            {
                checkBoxMDF.Checked = true;
            }
            else
            {
                checkBoxMDF.Checked = false;
            }
        }

It checks to see if the box is checked or unchecked and changes accordingly.

In my "code" tab, the code looks like this...

        if (!Form1.checkBoxMDF.Checked)
        {
            MessageBox.Show("The box in Form1 is Checked.");
        }
        else
        {
            MessageBox.Show("The box in Form1 is NOT Checked.");
        }

It again looks for the check in the box.

However, when I compile it I get the following error...

'WindowsApplication1.Form1.checkBoxMDF' is inaccessible due to its protection level"

I have to believe this is something simple that I am missing, however I have spent the night pulling my hair out.

Any one have any suggests as to what I am missing?

-Ravon

[Kenny164]

Did you try setting the control to public (generated code)?

Heres a wee sample from one of my forms listbox:

private System.Windows.Forms.ListBox listBox1;

Change it to:

public System.Windows.Forms.ListBox listBox1;

[RavonTUS]

Originally Posted by Kenny164

Did you try setting the control to public (generated code)?

Yes, that's what I thought too. However, it did not seem to make a difference.

-Ravon

[Kamron]

Your angle is wrong.

That event is triggered, After they checked/unchecked it.

So your code depends on what you want to do. The events you have to work with are "Checked" and "Unchecked". At the point of those events, the property IsChecked has already been set appropriately through the KeyDown/KeyUp and MouseDown/MouseUp or Click events.

If you wanted to prevent (actually reverse) it from being checked, then do this:

checkBoxMDF.IsChecked = !checkBoxMDF.IsChecked;

[RavonTUS]

Greetings,

Maybe I should give a better example. I when back to the basics and still can't figure out what I am doing wrong.

Form1.cs

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;

namespace Test
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        public void checkBox1_CheckedChanged(object sender, EventArgs e)
        {
            myCheckBox form1checkbox;
            form1checkbox = new myCheckBox();
          
            if (checkBox1.Checked)
            {
                checkBox1.Checked = true;
                form1checkbox.myCheckBoxStatus = "True";
            }
            else
            {
                checkBox1.Checked = false;
                form1checkbox.myCheckBoxStatus = "True";
            }

        }

        public void button1_Click(object sender, EventArgs e)
        {
            if (checkBox1.Checked)
                MessageBox.Show("Checked");
            else
                MessageBox.Show("UnChecked");

        }
    }
}

Form2.cs

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;

namespace Test
{
    public partial class Form2 : Form
    {
        public Form2()
        {
            InitializeComponent();
        }

        public void button1_Click(object sender, EventArgs e)
        {
            MessageBox.Show(form1checkbox.myCheckBoxStatus);
        }
    }
}

myCheckBox.cs

using System;
using System.Collections.Generic;
using System.Text;

namespace Test
{
    class myCheckBox
    {
        private string _myCheckBoxStatus;

        public string myCheckBoxStatus
        {
            get { return _myCheckBoxStatus; }
            set { _myCheckBoxStatus = value; }
        }

    }
}

I simply want to click the box in Form 2 and have it check Form 1's check box. How do I link them together?

-Ravon

[Kenny164]

Heres a wee cheap hack way of doing it (I feel bad for even posting this, lol):

Your form2:

public void button1_Click(object sender, EventArgs e)
        {
            string s = "False";
            //s = Application.OpenForms["form1"].Controls["CheckBox1"].Text;
            Form1 frm = (Form1)Application.OpenForms["Form1"];
            if (frm.checkBox1.Checked)
                s = "True";

            MessageBox.Show(s);
        }

Here's a few other ways:
Passing Data Between Forms - The Code Project - C# Programming

[RavonTUS]

Originally Posted by Kenny164

Heres a wee cheap hack way of doing it (I feel bad for even posting this, lol):

Kenny, thank you that is what I was looking for.

The other piece I needed was this...

This variable can be accessed anywhere from the application.

public class GlobalParam
{
    private static string strTestValue = "";

    public static string TestValue
    {
        get { return strTestValue; }
        set { strTestValue = value; }
    }
}

Now, you can get/set value to TestValue by using
GlobalParams.TestValue="My World";

Thanks for the help everyone.

-Ravon