C# 时间函数(几个常用时间,程序运行计时,页面运行计时)
1.DateTime
1 DateTime now = System.DateTime.Now;
2 now.ToString(); //显示: 2006/08/30 17:31:02
3 now.ToString("yyyy-mm-dd hh:MM:ss"); //显示: 2006-08-30 05:39:11
4 now.ToString("yyyy-mm-dd HH:mm:ss"); //显示: 2006-08-30 17:40:50
5 System.DateTime.MaxValue.ToString(); //显示: 9999/12/31 23:59:59
6 System.DateTime.MinValue.ToString(); //显示: 0001/01/01 0:00:00
7 now.ToLongDateString(); //显示: 2006年8月30日
8 now.ToLongTimeString(); //显示: 17:34:23
9 now.ToShortTimeString(); //显示: 17:34
10 now.ToString() + " " + now.Millisecond.ToString(); //显示: 2006/08/30 17:35:19 484
2 now.ToString(); //显示: 2006/08/30 17:31:02
3 now.ToString("yyyy-mm-dd hh:MM:ss"); //显示: 2006-08-30 05:39:11
4 now.ToString("yyyy-mm-dd HH:mm:ss"); //显示: 2006-08-30 17:40:50
5 System.DateTime.MaxValue.ToString(); //显示: 9999/12/31 23:59:59
6 System.DateTime.MinValue.ToString(); //显示: 0001/01/01 0:00:00
7 now.ToLongDateString(); //显示: 2006年8月30日
8 now.ToLongTimeString(); //显示: 17:34:23
9 now.ToShortTimeString(); //显示: 17:34
10 now.ToString() + " " + now.Millisecond.ToString(); //显示: 2006/08/30 17:35:19 484
2.程序运行时间:(单位 : 毫秒)
1 System.Diagnostics; //名称空间
2 int x = 0;
3 int nu = 0;
4 Stopwatch sw = new Stopwatch();
5 sw.Start();
6 //程序开始
7 for (int i = 0; i < 1000000; i++)
8 {
9 x += i;
10 }
11 //程序结束
12 sw.Stop();
13 this.label1.Text += ",sum=" + x.ToString();
14 MessageBox.Show(sw.ElapsedMilliseconds.ToString());
2 int x = 0;
3 int nu = 0;
4 Stopwatch sw = new Stopwatch();
5 sw.Start();
6 //程序开始
7 for (int i = 0; i < 1000000; i++)
8 {
9 x += i;
10 }
11 //程序结束
12 sw.Stop();
13 this.label1.Text += ",sum=" + x.ToString();
14 MessageBox.Show(sw.ElapsedMilliseconds.ToString());
3.计算一个页面执行时间:
在Global.asax.cs文件中增加以下代码:
1 protected void Application_BeginRequest(Object sender, EventArgs e)
2 {
3 Application["StartTime"] = System.DateTime.Now;
4 }
5 protected void Application_EndRequest(Object sender, EventArgs e)
6 {
7 System.DateTime startTime = (System.DateTime)Application["StartTime"];
8 System.DateTime endTime = System.DateTime.Now;
9 System.TimeSpan ts = endTime - startTime;
10 Response.Write("页面执行所用时间:" + ts.Milliseconds + " 毫秒");
11 }
12
2 {
3 Application["StartTime"] = System.DateTime.Now;
4 }
5 protected void Application_EndRequest(Object sender, EventArgs e)
6 {
7 System.DateTime startTime = (System.DateTime)Application["StartTime"];
8 System.DateTime endTime = System.DateTime.Now;
9 System.TimeSpan ts = endTime - startTime;
10 Response.Write("页面执行所用时间:" + ts.Milliseconds + " 毫秒");
11 }
12