线程

Thread t1;
            t1 = new Thread(new ThreadStart(updateCent));
            t1.IsBackground = true;//后台处理
            t1.Start(); //启动线程t1 ;

        //1.定义委托
        delegate void progressBar(int i);

        //2.委托的执行代码
        private void pValue(int i)
        {
            progressBar1.Value = i;
        } 

                  //3.调用委托把数据写入
                    progressBar tempMaximum = new progressBar(pMaximum);
                    this.Invoke(tempMaximum, ds.Tables["Table"].Rows.Count);