## link taskscheduler

ปกติผมจะรันให้ Datagridview   เพิ่มให้ครบก่อน เพราะจะดึง RowCount ไปใส่ใน ProgressBar1.Maximum 
[Spoil] คลิกเพื่อดูข้อความที่ซ่อนไว้ myProgressBar1.Maximum = this.dataGridView1.RowCount ;

จากนั้นก็จะใช้ taskscheduler รันงาน ครับ

[Spoil] คลิกเพื่อดูข้อความที่ซ่อนไว้           LimitedConcurrencyLevelTaskScheduler lcts = new LimitedConcurrencyLevelTaskScheduler(8);
            List<Task> tasks = new List<Task>);
            // Create a TaskFactory and pass it our custom scheduler.
            TaskFactory factory = new TaskFactory(lcts);
            CancellationTokenSource cts = new CancellationTokenSource();

for (int i = 0; i < dataGridView1.RowCount; i++)
            {
                runLoad = true;
                try
                {
                    int rowIndex = i;
                    Task t = factory.StartNew(() => {
                        var client = new HttpClient();
                        long? totalByte = 0;
                        string name = dataGridView1[1, rowIndex].Value.ToString() + ".mp4";
                        string nameTemp = Path.GetTempPath() + "SongLoad\\" + Path.GetFileName(dataGridView1[1, rowIndex].Value.ToString()) + ".mp4";
                        string nameMP3 = dataGridView1[1, rowIndex].Value.ToString() + ".mp3";
                        if (File.Exists(name) || File.Exists(nameMP3))
                        {
                            dataGridView1.Invoke((MethodInvoker)(() => dataGridView1[5, rowIndex].Value = 100));
                            finish();
                        }
                        else
                        {
                            Directory.CreateDirectory(Path.GetDirectoryName(nameTemp));
                            Directory.CreateDirectory(Path.GetDirectoryName(name));
                            try
                            {
                                var vid = youTube.GetVideo(dataGridView1[2, rowIndex].Value.ToString());
                                dataGridView1.Invoke((MethodInvoker)(() => dataGridView1[5, rowIndex].Value = 0));
                                long totalbytes = 0;
                                long collectedbytes = 0;

                                using (Stream output = File.OpenWrite(nameTemp))
                                {
                                    using (var request = new HttpRequestMessage(HttpMethod.Head, vid.Uri))
                                    {
                                        totalByte = client.SendAsync(request, HttpCompletionOption.ResponseHeadersRead).Result.Content.Headers.ContentLength;
                                    }
                                    totalbytes += (long)totalByte;
                                    Alltotalbytes += (long)totalByte;
                                    try
                                    {
                                        using (var input = client.GetStreamAsync(vid.Uri).Result)
                                        {
                                            byte[] buffer = new byte[16 * 1024];
                                            int read;
                                            int totalRead = 0;
                                            while ((read = input.Read(buffer, 0, buffer.Length)) > 0 || collectedbytes < totalbytes)
                                            {
                                                output.Write(buffer, 0, read);
                                                totalRead += read;
                                                collectedbytes += read;
                                                Allcollectedbytes += read;
                                                long x = collectedbytes * 80 / totalbytes;
                                                lblStatus.Write(TORServices.PathFile.FileTor.bytetobigger(Allcollectedbytes) + "/" + TORServices.PathFile.FileTor.bytetobigger(Alltotalbytes));
                                                try
                                                {
                                                    dataGridView1.Invoke((MethodInvoker)(() => dataGridView1[5, rowIndex].Value = (int)x));
                                                }
                                                catch { }

                                            }
                                        }
                                    }
                                    catch { dataGridView1.Invoke((MethodInvoker)(() => dataGridView1[5, rowIndex].Value = 100)); }
                                }
                                while (new FileInfo(nameTemp).Length < 10)
                                {
                                    System.Threading.Thread.Sleep(10000);
                                }
                                if (SoundOnly.Checked)
                                {
                                    _ = Task.Run(() => ConverttoMp3(nameTemp, nameMP3, rowIndex));
                                }
                                else
                                {
                                    try
                                    {
                                        File.Move(nameTemp, name);
                                        dataGridView1.Invoke((MethodInvoker)(() => dataGridView1[5, rowIndex].Value = 100));
                                    }
                                    catch { }
                                }
                            }
                            catch { }

                            client.Dispose();
                            finish();
                        }

                    }, cts.Token);
                    tasks.Add(t);
                }
                catch
                {
                    dataGridView1.Invoke((MethodInvoker)(() => dataGridView1[5, i].Value = 100));
                    finish();
                }
            }
Task.WaitAll(tasks.ToArray());
            cts.Dispose();

ผมใช้ for ในการ Add task คราวนี้ ผมอยากพัฒนาโดยที่ ขณะที่
Task.WaitAll(tasks.ToArray()); ทำงานอยู่
ผมอยากจะเพิ่มแถวใน  dataGridView ด้วย และ เพิ่ม Task ใน tasks ด้วย เพื่อให้ทำงานต่อเนื่อง แบบนี้ได้ไม๊ ครับ