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。