Progressbar in c#

----http://msdn.microsoft.com/en-us/library/system.componentmodel.backgroundworker(v=vs.90).aspx---- 

private void btnProcess_Click(object sender, EventArgs e)
        {
            if (BackGroundWorkerPhaseI.IsBusy != true)
            {
                BackGroundWorkerPhaseI.RunWorkerAsync();
            }
        }

        private void btnCancel_Click(object sender, EventArgs e)
        {
            if (BackGroundWorkerPhaseI.WorkerSupportsCancellation == true)
            {
                BackGroundWorkerPhaseI.CancelAsync();
            }
        }

        private void btnClose_Click(object sender, EventArgs e)
        {
            this.Close();
        }

        private void BackGroundWorkerPhaseI_DoWork(object sender, DoWorkEventArgs e)
        {
            try
            {
                for (int i = 1; (i <= 100); i++)
                {
                    if ((BackGroundWorkerPhaseI.CancellationPending == true))
                    {

                        e.Cancel = true;
                        for (int j = i; j >= 0; j--)
                        {
                            if (j == 10)
                            {
                                SqlQuery = "truncate table tbl_Complete_Teacher_Configuration";

                            }
                            if (j == 20)
                            {
                                SqlQuery = "truncate table  tbl_Complete_Teacher_Configuration; truncate table  tbl_Complete_Class_Configuration";
                            }
                            if (j == 30)
                            {
                                SqlQuery = "truncate table  tbl_Complete_Teacher_Configuration; truncate table  tbl_Complete_Class_Configuration;truncate table tbl_Configuration_master ";
                            }
                            if (j == 40)
                            {
                                SqlQuery = "truncate table  tbl_Complete_Teacher_Configuration; truncate table  tbl_Complete_Class_Configuration;truncate table tbl_Configuration_master; truncate table tbl_Allotment_Master ";

                            }
                            flag = deleteData.DeleteDataValues(SqlQuery);
                            BackGroundWorkerPhaseI.ReportProgress(j);
                        }
                        break;
                    }
                    else
                    {
                        // Wait 100 milliseconds.
                        if (i == 10)
                        {
                            SqlQuery = "sp_CreateTeacherConfigurtion";
                            flag = insertData.InsertDataValues(SqlQuery);
                        }
                        if (i == 20)
                        {
                            SqlQuery = "sp_CreateClassConfigurtion";
                            flag = insertData.InsertDataValues(SqlQuery);
                        }
                        if (i == 30)
                        {
                            SqlQuery = "sp_CreateConfigurationMaster";
                            flag = insertData.InsertDataValues(SqlQuery);
                        }
                        // Report progress.
                        if (i == 40)
                        {
                            SqlQuery = "sp_FillAlotmentsFromCombinedConditions";
                            flag = insertData.InsertDataValues(SqlQuery);
                        }
                        if (i == 50)
                        {
                            flag = ReflectCombinedConditions();
                        }
                        if (i == 60)
                        {
                          flag = GenerateAllotments();
                        }
                        //if (i == 90)
                        //{
                        //    flag = ReflectCombinedConditions();
                        //}
                        BackGroundWorkerPhaseI.ReportProgress(i);
                    }
                }
            }
            catch (Exception ex)
            {
            }
        }

        private void BackGroundWorkerPhaseI_ProgressChanged(object sender, ProgressChangedEventArgs e)
        {

            // Change the value of the ProgressBar to the BackgroundWorker progress.
            PhaseIProgressBar.Value = e.ProgressPercentage;
            // Set the text.
            this.Text = e.ProgressPercentage.ToString() + "%";
        }

        private void BackGroundWorkerPhaseI_RunWorkerCompleted(object sender, RunWorkerCompletedEventArgs e)
        {
            if ((e.Cancelled == true))
            {
                MessageBox.Show("Operation Aborted.!", "Time Table", MessageBoxButtons.OK, MessageBoxIcon.Error);
                PhaseIProgressBar.Value = 0;
                this.Text = "Operation Aborted";
            }

            else if (!(e.Error == null))
            {
                MessageBox.Show("Error: " + e.Error.Message, "Time Table", MessageBoxButtons.OK, MessageBoxIcon.Error);
                PhaseIProgressBar.Value = 0;
            }

            else
            {
                MessageBox.Show("PHASE-I Generation Completed.", "Time Table", MessageBoxButtons.OK, MessageBoxIcon.Information);
                PhaseIProgressBar.Value = 0;
            }
        }