C#实现闪动托盘图标示例

在用户正在登录QQ或者使用Firemail邮件系统自动收取邮件的时候，托盘图标会闪动提示用户正在运行的任务。

闪动图标可以使用定时切换托盘图标的方式实现，托盘图标可以从ImageList控件中获取。在ImageList控件里面添加三个icon，第一个icon表示窗体启动以后的托盘图标。第二个和第三个图标分别表示当特定的任务发生的时候，定时切换的图标。

（1）设置托盘的图标可以从ImageList控件中的Image对象转换为Icon对象，

///         /// 设置托盘显示的图标         ///         /// 图像列表中图片的索引         private void setIconImg(int index)         {             Image img = this.imgIcon.Images[index];             Bitmap b = new Bitmap(img);             Icon icon = Icon.FromHandle(b.GetHicon());             this.niMain.Icon = icon;         }

 

（2）定时器事件实现图标的切换

///         /// 定时器切换图标显示         ///         ///         ///         private void tmrIcon_Tick(object sender, EventArgs e)         {             if (iconFlag)             {                 this.setIconImg(1);                 iconFlag = !iconFlag;             }             else             {                 this.setIconImg(2);                 iconFlag = !iconFlag;               }         }

 

（3）窗体的最小化按钮和关闭按钮实现隐藏窗体的功能，窗体关闭时，会执行FormClosing 事件，释放与此窗体关联的所有资源。因此需要取消关闭事件，实现窗体的隐藏和托盘的显示功能。

///         /// 关闭窗体时隐藏窗体显示托盘图标         ///         ///         ///         private void FrmMain_FormClosing(object sender, FormClosingEventArgs e)         {             e.Cancel = true;             this.Hide();             this.niMain.Visible = true;         }

 

（4）托盘关联菜单有四个功能：

l         “显示” ：显示主窗体、隐藏托盘图标。

l         “运行”：图标闪动效果，模拟任务正在运行。

l         “停止”：恢复初始化的图标，模拟任务停止。

l         “退出”：提示用户并退出应用系统。

完整的代码如下：

namespace NotifyIconDemo {     public partial class FrmMain : Form     {           //切换图片的标识         private bool iconFlag = false;         //系统是否运行         private bool isRun = false;         ///         ///         ///         public FrmMain()         {             InitializeComponent();             //设置icon显示的图片             this.setIconImg(0);         }         ///         /// 设置托盘显示的图标         ///         /// 图像列表中图片的索引         private void setIconImg(int index)         {             Image img = this.imgIcon.Images[index];             Bitmap b = new Bitmap(img);             Icon icon = Icon.FromHandle(b.GetHicon());             this.niMain.Icon = icon;         }           ///         /// 显示主窗体         ///         ///         ///         private void tsmiMain_Click(object sender, EventArgs e)         {             //显示主窗体             this.Visible = true;             this.WindowState = System.Windows.Forms.FormWindowState.Normal;             //隐藏托盘图标             this.niMain.Visible = false;             this.Show();         }         ///         /// 退出         ///         ///         ///         private void tsmiExit_Click(object sender, EventArgs e)         {             //设置托盘的提示信息             this.niMain.BalloonTipText = "成功退出Demo!";             this.niMain.BalloonTipTitle = "退出";             this.niMain.ShowBalloonTip(1000*3);             //延迟退出             Thread.Sleep(1000 * 2);             //释放托盘图标资源             this.niMain.Dispose();             //终止线程             Application.ExitThread();         }         ///         /// 最小化时隐藏窗体，显示托盘图标         ///         ///         ///         private void FrmMain_SizeChanged(object sender, EventArgs e)         {             if (this.WindowState == FormWindowState.Minimized)             {                 this.Hide();                 this.niMain.Visible = true;             }           }             ///         /// 关闭窗体时隐藏窗体显示托盘图标         ///         ///         ///         private void FrmMain_FormClosing(object sender, FormClosingEventArgs e)         {             e.Cancel = true;             this.Hide();             //this.ShowInTaskbar = false;//取消窗体在任务栏的显示             this.niMain.Visible = true;         }         ///         /// 加载窗体时隐藏窗体         ///         ///         ///         private void FrmMain_Load(object sender, EventArgs e)         {             this.Hide();         }             ///         /// 定时器切换图标显示         ///         ///         ///         private void tmrIcon_Tick(object sender, EventArgs e)         {             if (!this.isRun)             {                 return;             }             if (iconFlag)             {                 this.setIconImg(1);                 iconFlag = !iconFlag;             }             else             {                 this.setIconImg(2);                 iconFlag = !iconFlag;             }         }         ///         /// 点击运行菜单         ///         ///         ///         private void tsmiRun_Click(object sender, EventArgs e)         {             this.tsmiRun.Enabled = false;             this.tsmiStop.Enabled = true;             //设置运行状态             this.isRun = true;         }         ///         /// 点击停止菜单         ///         ///         ///         private void tsmiStop_Click(object sender, EventArgs e)         {             this.tsmiRun.Enabled = true;             this.tsmiStop.Enabled = false;             //设置为停止状态             this.isRun = false;             //恢复图标显示             this.setIconImg(0);         }     } }