Background worker placement

Question

I am not sure if this is the proper place to ask, but this site has always been a trememdous help for me in other areas.

I have a perfect candidate for background threading in a small, personal Winforms application I am writing, and I am seeking help in trying to implement it properly/correctly.

This is the call from the presentation layer:

    private void btnGetSeasonSchedule_Click(object sender, EventArgs e){
        Cursor.Current = Cursors.WaitCursor;
        objSchedule.RetreiveSeasonSchedule();
        MessageBox.Show("Finished");
        Cursor.Current = Cursors.Default;
    }

This is the code in the BLL:

    public class SeasonSchedule{
        public ForumAssistantDAL.SeasonSchedule objSchedule = new ForumAssistantDAL.SeasonSchedule();

        public void RetreiveSeasonSchedule(){
            DataTable dtData = GetGamesInRange(DateTime.Parse("2015-10-07"), DateTime.Parse("2016-04-30"));

            // this call is to an SQLBulkUpdate function in the DAL
            objSchedule.UploadSchedule(dtData);
        }

        // ***** BackgroundWorker Candidate #1 *****
        // my first thought is to have the entire function below as a backgroundworker process
        //as it is used in a few other locations in the application *****

        private DataTable GetGamesInRange(DateTime startDate, DateTime endDate){
            DataTable dtScheduleTable = objSchedule.CreateScheduleTable();

            // ***** BackgroundWorker Candidate #1 *****
            // instead of the entire function, just put this ForEach loop in a BackgroundWorker

            foreach (DateTime day in EachDay(DateTime.Parse(startDate.ToString("yyyy-MM-dd")), DateTime.Parse(endDate.ToString("yyyy-MM-dd")))){
                //build proper URL using URIBuilder
                //...URL requires a formatted date, hence the necessity of re-building it in a foreach loop
                var uriBuilder = new UriBuilder();
                uriBuilder.Scheme = "http";
                uriBuilder.Host = "my.datasource.address";
                uriBuilder.Path = "path_part_1/path_part_2/" + day.ToString("yyyy-MM-dd") + ".jsonp";
                var uri = uriBuilder.Uri;

                try{
                    string json = new WebClient().DownloadString(uri);

                    json = json.Replace("loadScoreboard(", "");
                    json = json.Replace(")", "");

                    GameCollection gameDay = objSchedule.ParseGames(json);

                    // ***** BackgroundWorker Candidate #2 *****
                    // each GameCollection can contain from zero to N games
                    // each game is added to a temporary DataTable
                    // when the ForEach loop is complete, the entire DataTable is returned, and the DataTable is SQLBulkCopy-ied to the database server

                    foreach (DeserializedGame game in gameDay.Games){
                        objSchedule.InsertGame(game, dtScheduleTable, day);
                    }
                }
                catch (WebException ex){
                    if (ex.Status == WebExceptionStatus.ProtocolError && ex.Response != null){
                        var resp = (HttpWebResponse)ex.Response;
                        if (resp.StatusCode == HttpStatusCode.NotFound){
                            // HTTP 404 - the page was not found, continue with next in the for loop
                            continue;
                        }
                    }
                    //throw any other exception - this should not occur
                    throw;
                }
            }

            return dtScheduleTable;
        }

        private IEnumerable<DateTime> EachDay(DateTime from, DateTime thru){
            for (var day = from.Date; day.Date <= thru.Date; day = day.AddDays(1))
                yield return day;
        }
    }

My goal is the following:

• multi-thread this application correctly
• once the multi-threading is in place, I to implement two ProgressBars:
  • one for the ForEach loop (to track the processing for each day)
  • one for each DeserializedGame in the ForEach loop (BackgroundWorker Candidate #2)

I have looked at ThreadStart and ParameterizedThreadStart (which I believe is the proper one to use), but I feel I get very lost, very quickly when it comes to implementing the threading properly and correctly. Threading is a new concept for me, so any "for dummies" help you can offer would be greatly appreciated.