【转】C# 计算程序运行时间

 1 //计算程序运行时间(.net1.1 于.net2.0的区别)在.net2.0中提供了Stopwatch类，简单例子 
 2 using System.Diagnostics; 
 3 
 4 private Stopwatch stw = new Stopwatch(); 
 5 
 6 private void Form1_Load(object sender, EventArgs e) 
 7 { 
 8     stw.Start(); 
 9 } 
10 
11 private void Form1_FormClosing(object sender, FormClosingEventArgs e) 
12 { 
13     DialogResult dr = MessageBox.Show("真的要退出？", "退出", MessageBoxButtons.YesNo, MessageBoxIcon.Question); 
14     if (dr == DialogResult.Yes) 
15     { 
16         stw.Stop(); 
17         MessageBox.Show("程序共运行时间:" + stw.Elapsed.Seconds.ToString() + "秒"); 
18         e.Cancel = false; 
19     } 
20     else 
21     { 
22         e.Cancel = true; 
23     } 
24 } 
25 
26 //在.net1.1中，需要自己写 
27 using System; 
28 namespace StopWatchTest 
29 { 
30     class Class1 
31     { 
32         [STAThread] 
33         static void Main(string[] args) 
34         { 
35             StopWatch sw = new StopWatch(); 
36             sw.start(); 
37             for (long i = 0 ; i < 100000000 ; i++) 
38            { 
39 
40            } 
41            Console.WriteLine(sw.elapsed()); 
42 
43            Console.Read(); 
44         } 
45     } 
46 
47     class StopWatch 
48     { 
49         private int mintStart; 
50 
51         public void start() 
52         { 
53             mintStart = Environment.TickCount; 
54         } 
55 
56         public long elapsed() 
57         { 
58             return Environment.TickCount - mintStart; 
59         } 
60     } 
61 }