Question

I have windows form application that run a a class method by BackgroundWorker.

I would like to add the windows form a progress bar to show the progress.

in the class method I have a foreach loop so I would like each loop to send the form event

with the current percentage.

this is what i do :

public partial class Form1 : Form
    {
        Parsser inst;

        public Form1()
        {
            InitializeComponent();
            inst = new Parsser();
            backgroundWorker1.WorkerReportsProgress = true;
            backgroundWorker1.WorkerSupportsCancellation = true;
        }


        private void button2_Click(object sender, EventArgs e)
        {
            if (this.textBox1 != null & this.textBox2 != null)
            {
                if (backgroundWorker1.IsBusy != true)
                {
                    // Start the asynchronous operation.
                    backgroundWorker1.RunWorkerAsync();
                }
            }
        }



        private void backgroundWorker1_DoWork(object sender, DoWorkEventArgs e)
        {
            inst.init(this.textBox1.Text, this.textBox2.Text);

            inst.ParseTheFile();
            System.Windows.Forms.MessageBox.Show("Parsing finish successfully");

        }
        private void backgroundWorker1_ProgressChanged(object sender,                ProgressChangedEventArgs e)
        {
            this.progressBar1.Value = e.ProgressPercentage;
        }

    }


}

`

and in the class i do this-

public Parsser()
    {
        bgReports = new BackgroundWorker();
        bgReports.WorkerReportsProgress = true;
    }

    public void ParseTheFile()
    {
        Lines = File.ReadAllLines(FilePath);
        this.size = Lines.Length;
        foreach (string line in Lines)
        {

            bgReports.ReportProgress(allreadtchecked/size);

from some reason it dont work any idea?

Answer 1

Pass reference of BackgroundWorker to Parsser and then using that reference call ReportProgrss method

BackgroundWorker worker;

public Parsser(BackgroundWorker bg)
    {
        worker = bg;
    }

public void ParseTheFile()
{
    Lines = File.ReadAllLines(FilePath);
    this.size = Lines.Length;
    foreach (string line in Lines)
    {
        worker.ReportProgress(allreadtchecked/size);