Access mainform variables in usercontrol in winforms

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I am trying to access this down_time variable in usercontrol click event;

MainForm

public partial class MainForm : Form
   {
      public MainForm()
       {
           InitializeComponent();

       }

       public int down_time;

   }

Usercontrols

public partial class Machine_Running : UserControl
    {
 
        private void btn_Click(object sender, EventArgs e)
        {
            lable1.text = // this is where i wanna assign it 
        }

    }

What I have tried:

I tried to used this.Parent in UserControl to get the parent form but no luck. please help

Posted 26-Mar-19 10:04am

Dinuka Kuruppu

Updated 26-Mar-19 12:54pm

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Richard Deeming · Answer 1 · 2019-03-26T10:56:00

Solution 1

Transferring information between two forms, Part 1: Parent to Child[^]

Posted 26-Mar-19 10:56am

Richard Deeming

Dave Kreskowiak · Answer 2 · 2019-03-26T12:54:00

Your UserControl code should not be doing ANYTHING AT ALL with controls in the containing form.

The code in the UserControl should ONLY be concerned with the controls in its own design surface.

If you want to tell the containing for to show some data, your UserControl should expose an Event that the containing for subscribes to tell it there is some data it may be interested in. It's then up to the containing form code to determine what to do with that data.

Google: C# usercontrol custom events[^]