Copy items using progress bar

I am copying large files from one place to another. It is taking a long time so I decided to use a progress bar.

I am following this example.

The copyItems() function iterates through the list items and copies the items from another place. It in turn calls a function CopyListItem which copies one item .

I need to tie the backgroundWorker1.ReportProgress(i) to the total no of items i.e. itemcoll.

I do not want to use thread.sleep() .

The progress bar needs to show the actual time required to copy the file from one place to another.

using System.ComponentModel;
using System.Threading;
using System.Windows.Forms;

namespace WindowsFormsApplication1
{
    public partial class Form1 : Form
    {
    public Form1()
    {
        InitializeComponent();
    }
private void Form1_Load(object sender, System.EventArgs e)
{
    // Start the BackgroundWorker.
    backgroundWorker1.RunWorkerAsync();
}

private void backgroundWorker1_DoWork(object sender, DoWorkEventArgs e)
{
    for (int i = 1; i <= itemscoll.count; i++)
    {
    // Wait 100 milliseconds.
    Thread.Sleep(100);
    // Report progress.
    backgroundWorker1.ReportProgress(i);
    }
}
   private void CopyListItem(SPListItem sourceItem, string destinationListName, string destServerURL){


// copy items
        }
       private void copyitems()
        {
        try
         {
          int createdYear = 0;
           backgroundWorker1.RunWorkerAsync();
          foreach (SPListItem sourceItem in itemscoll)
          {
           if (Helper.year == createdYear)
           {
          CopyListItem(sourceItem, Helper.destinationListName,Helper.destServerURL);
          DeleteItem(CompRefNo);
           }
          } 
         }
         catch()
           {}
        }
    private void backgroundWorker1_ProgressChanged(object sender, ProgressChangedEventArgs e)
    {
        // Change the value of the ProgressBar to the BackgroundWorker progress.
        progressBar1.Value = e.ProgressPercentage;
        // Set the text.
        this.Text = e.ProgressPercentage.ToString();
    }
    }
}