9、多线程的操作

    该种多线程的实现方式是利用BackgroundWoker控件对线程操控的方便性，创建多个Form，而在每个Form下是实现功能。我们知道backgroundwoker控件在实现代码功能的时候开启了一个线程，在该线程执行的过程中可以向主线程传递进度等参数。线程执行结束后会调用Complete函数处理收尾的工作。但是当我们需要同时创建多个线程并让他们并发执行，这时显然不能满足需求。那么我们可以单独创建一个Form，该Form的主要作用就是实现你想实现多线程的代码块！然后用在backgroundwoker的doWoker中创建多个Form，其实每一个Form就是一个线程。这样做的好处是便于线程的管理，思路也比较使用system.threading要清晰。当然这种实现方法的操作灵活性和对线程的细致控制还是不能和System.Threading相比的。有不当和错误之处请各位指正！

一下仅列举了部分代码：

1、主界面功能程序
  //开始线程        private void ToolStripMenuItemStart_Click(object sender, EventArgs e)        {            menuStripMain.Enabled = false;            toolStripButtonStart.Enabled = false;            toolStripButtonStop.Enabled = true;            toolStripProgressBar1.Value = 0;            toolStripProgressBar1.Maximum = dataGridViewData.Rows.Count;                        if (dataGridViewData.Rows.Count != 0)            {                foreach (DataGridViewRow row in dataGridViewData.Rows)                {                    SearchThread thread = new FormSearch();                    GloableData.Thread.Add(thread);                }                timerThread.Enabled = true;                timerUi.Enabled = true;            }            else            {                MessageBox.Show("没有可以开始的项！");            }        }                 private void timerThread_Tick(object sender, EventArgs e)        {            if (GloableData.ThreadCount < 100 && GloableData.ThreadIndex < dataGridViewData.Rows.Count)            {                string[] strArgument = { dataGridViewData.Rows[GloableData.ThreadIndex].Cells[0].Value.ToString(), GloableData.ThreadIndex.ToString() };                dataGridViewData.Rows[GloableData.ThreadIndex].Cells[2].Value = "正在执行";                dataGridViewData.Rows[GloableData.ThreadIndex].Selected = true;                GloableData.Thread[GloableData.ThreadIndex].Search(strArgument);                GloableData.ThreadIndex++;                GloableData.ThreadCount++;            }            else if (GloableData.ThreadIndex == dataGridViewData.Rows.Count)            {                timerThread.Enabled = false;            }        }        private void timerUi_Tick(object sender, EventArgs e)        {                                                                     if (toolStripProgressBar1.Value == toolStripProgressBar1.Maximum)            {                timerUi.Enabled = false;                menuStripMain.Enabled = true;                toolStripButtonStart.Enabled = true;                toolStripButtonStop.Enabled = true;            }            dataGridViewData.Rows[GloableData.ProgressMessage[0]].Cells[1].Value = GloableData.ProgressMessage[1];                        lock (new object())            {                foreach (int index in GloableData.Progress)                {                    toolStripProgressBar1.Value++;                    dataGridViewData.Rows[index].Cells[2].Value = "完成";                    dataGridViewData.Rows[index].Selected = false;                    dataGridViewData.Rows[index].Cells[1].Value = 100;                }                GloableData.Progress.Clear();            }            Application.DoEvents();        }       2、FormSearch的模板        public void Search(string[] strArgument)        {                        backgroundWorker1.RunWorkerAsync(strArgument);        }        private void backgroundWorker1_DoWork(object sender, DoWorkEventArgs e)        {            string[] argument = (string[])e.Argument;            GetCarData getData = new GetCarData();            getData.ProxyManager = GloableData.ProxyManager;            int totalCount = 0;            //取第一页的数据            int i = 1, j = 0,count = 0;            e.Result = argument[1];            do            {                List<string> value = new List<string>();                MatchCollection strJson = getData.Search(i, argument[0], out totalCount);                if (strJson != null)                {                    foreach (Match json in strJson)                    {                        backgroundWorker1.WorkerSupportsCancellation = GloableData.StopFlag;                        if (json != null)                        {                            string result = getData.CarData(json);                            if(result != "")                            {                                string data = getData.JsonToDataTable(argument[0],result);                                if (data != "")                                {                                    value.Add(data);                                }                            }                        }                        else if (backgroundWorker1.CancellationPending)                        {                                                        e.Cancel = true;                            return;                        }                                                j++;                        backgroundWorker1.ReportProgress((j * 100 / totalCount), argument[1]);                    }                    //计算分页数目                    count = (int)Math.Ceiling((double)totalCount / (double)300);                    i++;                    lock (new object())                    {                        DBControl.InsertIntoAccess(value);                    }                }            } while (i <= count);                    }               private void backgroundWorker1_ProgressChanged(object sender, ProgressChangedEventArgs e)        {                        lock (new object())            {                GloableData.ProgressMessage[0] = Convert.ToInt32((string)e.UserState);                GloableData.ProgressMessage[1] = e.ProgressPercentage;            }        }        private void backgroundWorker1_RunWorkerCompleted(object sender, RunWorkerCompletedEventArgs e)        {            if (GloableData.ThreadCount > 0)            {                GloableData.ThreadCount--;            }            lock (new object())            {                GloableData.Progress.Add(Convert.ToInt32((string)e.Result));            }        }    }