Change variables in form from class

Pavol

Hi

I need change variables in form from class

I have event on button.

private void listenClick(object sender, EventArgs e)
{
if (button == false)
            {
                button = true;
                listen.Text = "Close";
                listen.BackColor = Color.Red;
                textLp.Enabled = false;
                textRp.Enabled = false;
                textIp.Enabled = false;
                textSend.Enabled = true;

            }
            else
            {
                button = false;
                listen.Text = "Listen";
                listen.BackColor = Color.Lime;
                textLp.Enabled = true;
                textRp.Enabled = true;
                textIp.Enabled = true;
                textSend.Enabled = false;

            }
}

I need change all this variables in class.

8 Replies

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

Vulpes13y ago
Yes, from the class you could do:

f1.listen.BackColor = Color.Blue; // or whatever
Pavol13y ago
I change in properties "listen" private on internal. In class will be able to change "listen" color.
Vulpes13y ago
You need to change the Modifiers property of 'listen' which I assume is the name of your button from private to internal so that it can be accessed from the class - otherwise it will only be accessible within the form.

The bool 'button' variable does not need to be changed.
Pavol13y ago
I change private to internal ? In form: private bool button internal bool button --> after the change In class: try { //some code } catch(exception) { Form1 f1 = Application.OpenForms["Form1"] as Form1; f1.listen.PerformClick(); //this change variable on true but false }
Vulpes13y ago
Something like this perhaps after changing Modifiers property of 'listen' button from private to internal:

try
{
// some code here
}
catch(Exception)
{
Form1 f1 = Application.OpenForms["Form1"] as Form1;
if (f1 != null) f1.listen.PerformClick();
}
Pavol13y ago
But i used in class exception try and catch. If exception occour change variables in form. I dont understant your answer.
Vulpes13y ago
There are many ways to do this but I'll describe one of the easiest.

In the Properties Box, change the Modifiers property of the controls you want to access from private to internal.

In your class, get a reference to the Form (say Form1) which contains those controls as follows:

Form1 f1 = Application.OpenForms["Form1"] as Form1;

You can now access the controls like this:

if (f1 != null)
{
f1.listen.Text = "Close";
f1.textRp.Enabled = false;
// etc.
}

If listenClick is an event handler in Form1, you can also fire it from the class without actually clicking the button as follows:

f1.listen.PerformClick();

You'll need to make sure that your class file has the following 'using' directive as it may not be added by default:

using System.Windows.Forms;
Iftikar Hussain13y ago
Hi,
Not clear about your query. Can you bit explain more?

Regards,
Iftikar