C#使用timer实现的简单闹钟程序

本文实例讲述了C#使用timer实现的简单闹钟程序。分享给大家供大家参考。具体如下：

当我在电脑上工作，我经常会被一些东西吸引，比如某宝，结果三个小时过去了我都完全没有注意到。所以我通过C#做了一个简单闹钟程序，这个小程序主要使用C# Timer对象，让用户设定一个倒计时的时长，如果时间到了，就播放一个wav音频文件（也就是闹铃）。

我一直试图保持这个timer的简单性，但我还是添加了一些额外的功能，在状态栏中显示一个通知图标。
通过这个小应用你也可以了解到C#中timer定时器的一些简单用法。

using System;
using System.Drawing;
using System.Collections;
using System.ComponentModel;
using System.Windows.Forms;
using System.Data;
using System.Threading;
using System.Timers;
using System.IO;
using System.Reflection;
namespace timerAlarm
{
 public class TimerForm : System.Windows.Forms.Form
 {
   //Controls and Components
   private System.Windows.Forms.TextBox timerInput;
   private System.Windows.Forms.Button StartButton;
   private System.Windows.Forms.Button ResetButton;
   private System.ComponentModel.IContainer components;
   //Timer and associated variables
   private System.Timers.Timer timerClock = new System.Timers.Timer();
   private int clockTime = 0;
   private int alarmTime = 0;
   public TimerForm()
   {
     InitializeComponent();
     InitializeTimer();
   }
   protected override void Dispose( bool disposing )
   {
     if( disposing )
     {
       if (components != null)
       {
         components.Dispose();
       }
     }
     base.Dispose( disposing );
   }
   #region Windows Form Designer generated code
   /// <SUMMARY>
   /// Required method for Designer support - do not modify
   /// the contents of this method with the code editor.
   /// </SUMMARY>
   private void InitializeComponent()
   {
     this.components = new System.ComponentModel.Container();
     System.Resources.ResourceManager resources = new System.
       Resources.ResourceManager(typeof(TimerForm));
     this.timerInput = new System.Windows.Forms.TextBox();
     this.StartButton = new System.Windows.Forms.Button();
     this.ResetButton = new System.Windows.Forms.Button();
     this.SuspendLayout();
     //
     // timerInput
     //
     this.timerInput.Location = new System.Drawing.Point(12, 13);
     this.timerInput.Name = "timerInput";
     this.timerInput.Size = new System.Drawing.Size(50, 20);
     this.timerInput.TabIndex = 0;
     this.timerInput.Text = "00:00:00";
     //
     // StartButton
     //
     this.StartButton.FlatStyle = System.Windows.Forms.
       FlatStyle.System;
     this.StartButton.Location = new System.Drawing.Point(75, 11);
     this.StartButton.Name = "StartButton";
     this.StartButton.TabIndex = 1;
     this.StartButton.Text = "Start";
     this.StartButton.Click += new System.EventHandler
       (this.StartButton_Click);
     //
     // ResetButton
     //
     this.ResetButton.FlatStyle = System.Windows.Forms.
       FlatStyle.System;
     this.ResetButton.Location = new System.Drawing.Point(161, 11);
     this.ResetButton.Name = "ResetButton";
     this.ResetButton.TabIndex = 2;
     this.ResetButton.Text = "Reset";
     this.ResetButton.Click += new
       System.EventHandler(this.ResetButton_Click);
     //
     // TimerForm
     //
     this.AutoScaleBaseSize = new System.Drawing.Size(5, 13);
     this.ClientSize = new System.Drawing.Size(247, 46);
     this.Controls.AddRange(new System.Windows.Forms.Control[] {
        this.ResetButton,
        this.StartButton,
        this.timerInput});
     this.FormBorderStyle = System.Windows.Forms.
       FormBorderStyle.FixedSingle;
     this.Icon = ((System.Drawing.Icon)(resources.
       GetObject("$this.Icon")));
     this.MaximizeBox = false;
     this.Name = "TimerForm";
     this.StartPosition = System.Windows.Forms.
       FormStartPosition.CenterScreen;
     this.Text = "Alarm Timer";
     this.Resize += new System.EventHandler(this.
       TimerForm_Resized);
     this.ResumeLayout(false);
   }
   #endregion
   public void InitializeTimer()
   {
     this.timerClock.Elapsed += new ElapsedEventHandler(OnTimer);
     this.timerClock.Interval = 1000;
     this.timerClock.Enabled = true;
   }
   [STAThread]
   static void Main()
   {
     Application.Run(new TimerForm());
   }
   private void TimerForm_Resized(object sender, System.EventArgs e)
   {
     if( this.WindowState == FormWindowState.Minimized )
     {
       this.Hide();
     }
   }
   private void StartButton_Click(object sender, System.EventArgs e)
   {
     this.clockTime = 0;
     inputToSeconds( this.timerInput.Text );
   }
   private void ResetButton_Click(object sender, System.EventArgs e)
   {
     try
     {
       this.clockTime = 0;
       this.alarmTime = 0;
       this.timerInput.Text = "00:00:00";
     }
     catch( Exception ex )
     {
       MessageBox.Show("ResetButton_Click(): " + ex.Message );
     }
   }
   public void OnTimer(Object source, ElapsedEventArgs e)
   {
     try
     {
       this.clockTime++;
       int countdown = this.alarmTime - this.clockTime ;
       if( this.alarmTime != 0 )
       {
         this.timerInput.Text = secondsToTime(countdown);
       }
       //Sound Alarm
       if( this.clockTime == this.alarmTime )
       {
         MessageBox.Show("Play Sound");
       }
     }
     catch( Exception ex )
     {
       MessageBox.Show("OnTimer(): " + ex.Message );
     }    
   }
   private void inputToSeconds( string timerInput )
   {
     try
     {
       string[] timeArray = new string[3];
       int minutes = 0;
       int hours = 0;
       int seconds = 0;
       int occurence = 0;
       int length = 0;
       occurence = timerInput.LastIndexOf(":");
       length = timerInput.Length;
       //Check for invalid input
       if( occurence == -1 || length != 8 )
       {
         MessageBox.Show("Invalid Time Format.");
         ResetButton_Click( null, null );
       }
       else
       {
         timeArray = timerInput.Split(':');
         seconds = Convert.ToInt32( timeArray[2] );
         minutes = Convert.ToInt32( timeArray[1] );
         hours = Convert.ToInt32( timeArray[0] );
         this.alarmTime += seconds;
         this.alarmTime += minutes*60;
         this.alarmTime += (hours*60)*60;
       }
     }
     catch( Exception e )
     {
       MessageBox.Show("inputToSeconds(): " + e.Message );
     }
   }
   public string secondsToTime( int seconds )
   {
     int minutes = 0;
     int hours = 0;
     while( seconds >= 60 )
     {
       minutes += 1;
       seconds -= 60;
     }
     while( minutes >= 60 )
     {
       hours += 1;
       minutes -= 60;
     }
     string strHours = hours.ToString();
     string strMinutes = minutes.ToString();
     string strSeconds = seconds.ToString();
     if( strHours.Length < 2 )
       strHours = "0" + strHours;
     if( strMinutes.Length < 2 )
       strMinutes = "0" + strMinutes;
     if( strSeconds.Length < 2 )
       strSeconds = "0" + strSeconds;
     return strHours + ":" + strMinutes + ":" + strSeconds;
   }
 }
}

完整实例代码点击此处本站下载。

希望本文所述对大家的C#程序设计有所帮助。