How can i update the progress bar in window application from another class?

Question

I have created one windows form, there i have a progress bar, i want to update the value of progress bar, from another class. I have written one function in my class on its execution, i want to see the progress in progress bar.

For Example:

1. The code written in forms .cs file:

 namespace UpdateProgressBar
{
    public partial class ProgressBarUdpate : Form
    {
        public ProgressBarUdpate()
        {
            InitializeComponent();
        }

        private void btn_Submit_Click(object sender, EventArgs e)
        {
            UpdateDataProgress updt = new UpdateDataProgress();
            updt.ExecuteFucntion();
        }
    }
}

2. The code written in another class

namespace UpdateProgress
{
    public class UpdateDataProgress
    {
        public void ExecuteFucntion()
        {
            for (int i = 0; i < 100; i++)
            {

            }

        }
    }
}

My Expected output is when i call updt.ExecuteFucntion function it should update the progressbar values as per loop implemented in another class.

Answer 1

You should use Event in such requirement.

Logic:

As your basic requirement is to update Progressbar ( UI ) based on current status of execution of a method (which is in class library)

You need to raise an event while executing ExecuteFucntion() . This Event will be Handled at ProgressBarUdpate form.

As you can see in code below, after creating an object of UpdateDataProgress , we are subscribing it's event by updt.ExecutionDone += updt_ExecutionDone;

Thus as soon as That event raised form ExecuteFucntion() it will call updt_ExecutionDone of ProgressBarUdpate where you can suerly update your progress bar.

Update your code as below.

    public partial class ProgressBarUdpate : Form
    {
        public ProgressBarUdpate()
        {
            InitializeComponent();
        }

        private void btn_Submit_Click(object sender, EventArgs e)
        {
            UpdateDataProgress updt = new UpdateDataProgress();
            updt.ExecutionDone += updt_ExecutionDone;
            updt.ExecuteFucntion();
        }

        void updt_ExecutionDone(int value)
        {
            //Update your progress bar here as per value
        }
    }

and class UpdateProgress

    public delegate void ExceutionHandler(int value);
    public class UpdateDataProgress
    {
        public event ExceutionHandler ExecutionDone;
        public void ExecuteFucntion()
        {
            for (int i = 0; i < 100; i++)
            {
                //perform your logic

                //raise an event which will have current i 
                //      to indicate current state of execution
                //      use this event to update progress bar 

                if (ExecutionDone != null)
                    ExecutionDone(i);
            }

        }
    }

Answer 2

You can use Events, or simply:

1. Code in form:

    private void btn_Submit_Click(object sender, EventArgs e) { UpdateProgress.UpdateDataProgress updt = new UpdateProgress.UpdateDataProgress(); updt.ExecuteFucntion(progressBar1); } 

2. Code in class:

    public class UpdateDataProgress { public void ExecuteFucntion(System.Windows.Forms.ProgressBar progbar) { for (int i = 0; i < 100; i++) { progbar.Value = i; } } }