多线程操作（ThreadPool.QueueUserWorkItem

 1         private void GetPolicy_Load(object sender, EventArgs e)
 2         {
 3             ////ThreadPool.QueueUserWorkItem(new WaitCallback(ThreadSP));
 4             try
 5             {
 6                 MessageBox.Show("开始"); 
 7                 ManualResetEvent[] _ManualEvents = new ManualResetEvent[2];
 8                 _ManualEvents[0] = new ManualResetEvent(false);
 9                 _ManualEvents[1] = new ManualResetEvent(false);
10                 ThreadPool.QueueUserWorkItem(new WaitCallback(ThreadSP2), _ManualEvents[0]); 
13                 
14                 foreach (var v in _ManualEvents)
15                 {
16                     v.WaitOne();
17                 } 
18                 // 线程结束后执行后面的主线程代码  
19                 MessageBox.Show("结束了");
20             }
21             catch (Exception ex)
22             {
23  
24             }
25         }

 //信天游 获取政策(方法2）
        private void ThreadSP2(object obj)
        {

            ////处理方法
            //string sql = "select id,start,end from tb";
            //DataTable dt = SqlHelper.ExecuteDataset("连接字符串", System.Data.CommandType.Text, sql, null).Tables[0];
            //List<string> list;
            //for (int i = 0; i < dt.Rows.Count; i++)
            //{
            //    list = new List<string>();
            //    list.Add(dt.Rows[i]["start"] + ";" + dt.Rows[i]["end"] + ";" + dt.Rows[i]["id"]);
            //    GJShopping2 s1 = new GJShopping2();
            //    ThreadPool.QueueUserWorkItem(new WaitCallback(s1.GetShopping), list);
            //    Thread.Sleep(1500);
            //}
            MessageBox.Show("ThreadSP2 方法执行了");
            ManualResetEvent e = (ManualResetEvent)obj;
            e.Set();
        }