倒计时功能实现

 1 //program.cs
 2 using system;
 3 using system.collections.generic;
 4 using system.linq;
 5 using system.threading.tasks;
 6 using system.windows.forms;
 7 
 8 namespace timerexc01
 9 {
10     static class program
11     {
12         /// <summary>
13         /// 应用程序的主入口点。
14         /// </summary>
15         [stathread]
16         static void main()
17         {
18             application.enablevisualstyles();
19             application.setcompatibletextrenderingdefault(false);
20             application.run(new form1());
21         }
22     }
23 }

  1 //form1.cs
  2 using system;
  3 using system.collections.generic;
  4 using system.componentmodel;
  5 using system.data;
  6 using system.drawing;
  7 using system.linq;
  8 using system.text;
  9 using system.threading.tasks;
 10 using system.windows.forms;
 11 
 12 namespace timerexc01
 13 {
 14     public partial class form1 : form
 15     {
 16         private int time = 0;
 17         private int firstsecond = 0;//启动程序时的时间
 18         private int firsthour = 0;
 19         private int firstminute = 0;
 20 
 21         public form1()
 22         {
 23             initializecomponent();
 24         }
 25 
 26         private void tmrcounttime_tick(object sender, eventargs e)
 27         {
 28             time++;
 29             int currenthour = time / 3600;
 30             int currentminu = (time % 3600) / 60;
 31             int currentsecond = (time % 3600) % 60;
 32             this.tbxtime.text = currenthour + "时" + currentminu + "分" + currentsecond + "秒";
 33         }
 34 
 35         private void btnstart_click(object sender, eventargs e)
 36         {
 37             this.tmrcounttime.enabled = true;
 38         }
 39 
 40         private void btnstop_click(object sender, eventargs e)
 41         {
 42             time = 0;
 43             this.tmrcounttime.enabled = false;
 44         }
 45 
 46         #region 界面加载
 47         private void form1_load(object sender, eventargs e)
 48         {
 49             datetime datetime = system.datetime.now;
 50             this.numhour.value = datetime.hour;
 51             this.numminu.value = datetime.minute;
 52             this.numsecond.value = datetime.second;
 53             firstsecond = datetime.second;//记录下最初的秒数
 54             firstminute = datetime.minute;
 55             firsthour = datetime.hour;
 56             tmrcurrenttime.enabled = true;
 57         }
 58         #endregion
 59 
 60         #region 定时器更新当前系统时间
 61         int countsecond = 0;
 62         private void tmrcurrenttime_tick(object sender, eventargs e)
 63         {
 64             int currentminu = 0; int currenthour = 0;
 65             countsecond += 1;
 66             //最初的秒加上定时器走过的秒
 67             int pastsumallsecond = firstsecond + countsecond;
 68 
 69             //求小时数
 70             int hour = pastsumallsecond / 3600;
 71 
 72             int leftsecond = pastsumallsecond % 3600;
 73 
 74             //求分钟数
 75             int minute = leftsecond / 60;
 76 
 77             //求秒数
 78             int second = leftsecond % 60;
 79 
 80 
 81             int resulsecond = firstsecond + second;
 82 
 83             //if (resulsecond >= 60)
 84             //{
 85             //    this.numsecond.value = resulsecond % 60;
 86             //}
 87             //else
 88             //{
 89             this.numsecond.value = second;
 90             //}
 91             currentminu  = firstminute + minute;
 92 
 93             if (currentminu > 60)
 94             {
 95                 this.numminu.value = currentminu % 60;
 96 
 97             }else if(currentminu==60)
 98             {
 99                 firsthour++;
100                 //currenthour = firsthour + hour + 1;
101                 this.numminu.value = 0;
102             }
103             else
104             {
105                 currentminu = firstminute + minute;
106                 this.numminu.value = currentminu;
107             }
108 
109             
110             //更新界面小时，分钟，秒
111             if (currenthour > 24)
112             {
113                 this.numhour.value = currenthour % 24;
114             }else if(currenthour==24)
115             {
116                 this.numhour.value = 0;
117             }
118             else
119             {
120                 currenthour = firsthour + hour;
121                 this.numhour.value = currenthour;
122             }
123         }
124         #endregion
125 
126         #region 定时关机按钮
127         private void btnclosepc_click(object sender, eventargs e)
128         {
129             string cmd = "shutdown -r-t";
130         }
131         #endregion
132 
133         private void numhour_valuechanged(object sender, eventargs e)
134         {
135 
136         }
137     }
138 }