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   源码介绍

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private void btnCalculate_Click(object sender, EventArgs e)
        {
            Thread mythread = new Thread(Calculate);
            mythread.IsBackground = true;        //設置為後臺線程,程式關閉后進程也關閉,如果不設置true，則程式關閉,此線程還在內存,不會關閉
            mythread.Start();
        }
        private void Calculate()
        {
            this.Invoke(new Action(() => { progressBarWay.Visible = true; }));
            Stopwatch stopwatch = Stopwatch.StartNew();
            this.Invoke(new Action(() => { progressBarWay.Maximum = 500; }));
            for (int i = 0; i < 500; i  )
            {
                Thread.Sleep(5);
                this.Invoke(new Action(() => { progressBarWay.Value = i; }));
            }
            this.Invoke(new Action(() => { progressBarWay.Visible = false; }));
            stopwatch.Stop();
            long lSearchTime = stopwatch.ElapsedMilliseconds;
            MessageBox.Show(lSearchTime.ToString()   "毫秒");
        }