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用c#实现智能设备上的notifyicon类 _c#应用

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    前几天有网友问.NET CF中怎么实现NotifyIcon,我这才知道原来.NET CF并没有提供NotifyIcon控件。
    于是偶想PC上可以用Shell_NotifyIcon和MessageWindow来实现托盘图标,只是不知道.NET CF支持不支持这两个东东了。仔细看了一下.NET CF中可疑的命名空间,没想到在Microsoft.WindowsCE.Forms命名空间里面竟然有一个MessageWindow 类,太好了,只剩下一个Shell_NotifyIcon 函数了。接着   在Window CE的SDK的帮助文件里,又发现Window CE Platform API已经包含了Shell_NotifyIcon函数。两大“主料”都齐了,只剩下锅了。
    先看一下MessageWindow类,这个类提供了 WndProc 方法,用于处理窗口消息,并公开了可能传递给本机窗口函数的有效窗口句柄。要使用它,派生一个新类,并重写的 WndProc 方法,这样才能截获特定的窗口消息。这里主要用来处理click事件。
        Shell_NotifyIcon的用法如下:


[DllImport(“coredll.dll”)]
internal static extern int Shell_NotifyIcon(int dwMessage, ref  NOTIFYICONDATA pnid);


其中,NOTIFYICONDATA结构如下:


struct NOTIFYICONDATA
{
    int cbSize;
    IntPtr hWnd;
    uint uID;
    uint uFlags;
    uint uCallbackMessage;
    IntPtr hIcon;
}
     Pnid参数的生命需要注意,是按引用传递的,因为Shell_NotifyIcon 需要一个指向 NOTIFYICONDATA 结构的指针。
    hWnd是用来接收任务栏中图标单击消息的窗口的句柄。
运行示例的时候由于窗体最大化,挡住了任务栏,把窗体最小化之后就能看到托盘图标了。(效果图片竟然贴不上来,改天再贴吧)
该类和示例的下载地址:http://www.cnblogs.com/Files/ttinfo/NotifyIconCf.rar


下面是NotifyIcon类的实现,别忘了引用Microsoft.WindowsCE.Forms。注意Add方法提供了不同的重载形式,具体请参看注释:



using System;
using System.Runtime.InteropServices;
using System.Windows.Forms;


namespace NotifyClient
{
    /**//// <summary>
    /// 智能设备托盘图标类
    /// </summary>
    public class NotifyIcon
    {
        //单击事件
        public event System.EventHandler Click;


        private MyMessageWindow messageWindow;
        private int uID = 5000;
        private System.Drawing.Icon _Icon;
       
        public NotifyIcon()
        {
            messageWindow = new MyMessageWindow(this);
            messageWindow.uID = uID;
        }
        public System.Drawing.Icon Icon
        {
            set
            {
                _Icon = value;


            }
        }
     
        ~NotifyIcon()
        {
            Remove();
        }


        /**//// <summary>
        /// 添加托盘图标
        /// </summary>
        /// <param name=”hIcon”>icon文件的有效句柄</param>
        public void Add(IntPtr hIcon)
        {
            NotifyMessage(messageWindow.Hwnd, NIM_ADD, (uint)uID, hIcon);
        }
        /**//// <summary>
        /// 添加托盘图标
        /// </summary>
        /// <param name=”IconRes”>编译之后的资源文件中的icon资源名称,如“#201547”</param>
        public void Add(string IconRes)
        {
            IntPtr hIcon = LoadIcon(GetModuleHandle(null), IconRes);
            NotifyMessage(messageWindow.Hwnd, NIM_ADD, (uint)uID, hIcon);
        }
        /**//// <summary>
        /// 添加托盘图标
        /// </summary>
        /// <param name=”icon”>icon文件</param>
        public void Add(System.Drawing.Icon icon)
        {
            NotifyMessage(messageWindow.Hwnd, NIM_ADD, (uint)uID, icon.Handle);
        }
        /**//// <summary>
        /// 添加托盘图标;icon为属性中的icon
        /// </summary>
        public void Add()
        {
            if (_Icon != null)
            {
                NotifyMessage(messageWindow.Hwnd, NIM_ADD, (uint)uID, _Icon.Handle);
            }
        }
        public void Remove()
        {


            NotifyMessage(messageWindow.Hwnd, NIM_DELETE, (uint)uID, IntPtr.Zero);
        }


        public void Modify(IntPtr hIcon)
        {


            NotifyMessage(messageWindow.Hwnd, NIM_MODIFY, (uint)uID, hIcon);


        }


 


        private void NotifyMessage(IntPtr hwnd, int dwMessage, uint uID, IntPtr hIcon)
        {
            NOTIFYICONDATA notdata = new NOTIFYICONDATA();


            notdata.cbSize = 152;
            notdata.hIcon = hIcon;
            notdata.hWnd = hwnd;
            notdata.uCallbackMessage = WM_NOTIFY_TRAY;
            notdata.uFlags = NIF_MESSAGE | NIF_ICON;
            notdata.uID = uID;


            int ret = Shell_NotifyIcon(dwMessage, ref notdata);
        }


        API#region API
        //定义消息常量
        const int NIF_MESSAGE = 0x00000001;
        const int NIF_ICON = 0x00000002;
        internal const int WM_LBUTTONDOWN = 0x0201;   


        internal const int NIM_ADD = 0x00000000;
        internal const int NIM_MODIFY = 0x00000001;
        internal const int NIM_DELETE = 0x00000002;


        //自定义消息
        internal const int WM_NOTIFY_TRAY = 0x0400 + 2001;


       



        internal struct NOTIFYICONDATA
        {
            internal int cbSize;
            internal IntPtr hWnd;
            internal uint uID;
            internal uint uFlags;
            internal uint uCallbackMessage;
            internal IntPtr hIcon;           
        }


        [DllImport(“coredll.dll”)]
        internal static extern int Shell_NotifyIcon(
            int dwMessage, ref NOTIFYICONDATA pnid);


        [DllImport(“coredll.dll”)]
        internal static extern int SetForegroundWindow(IntPtr hWnd);


        [DllImport(“coredll.dll”)]
        internal static extern int ShowWindow(
            IntPtr hWnd,
            int nCmdShow);


        [DllImport(“coredll.dll”)]
        internal static extern IntPtr GetFocus();


        [DllImport(“coredll.dll”)]
        internal static extern IntPtr LoadIcon(IntPtr hInst, string IconName);


        [DllImport(“coredll.dll”)]
        internal static extern IntPtr GetModuleHandle(String lpModuleName);



        #endregion



        MessageWindow#region MessageWindow


        internal class MyMessageWindow : Microsoft.WindowsCE.Forms.MessageWindow
        {
           
            private int _uID = 0;
            private NotifyIcon notifyIcon;


          
            public MyMessageWindow(NotifyIcon notIcon)
            {
                notifyIcon = notIcon;
            }


            public int uID
            {
                set
                {
                    _uID = value;


                }
            }


            protected override void WndProc(ref Microsoft.WindowsCE.Forms.Message msg)
            {


                if (msg.Msg == WM_NOTIFY_TRAY)
                {
                    if ((int)msg.LParam == WM_LBUTTONDOWN)
                    {
                        if ((int)msg.WParam == _uID)
                        {
                           
                            if (notifyIcon.Click != null)
                                notifyIcon.Click(notifyIcon, null);


                        }
                    }
                }


            }
        }
        #endregion


    }
}
http://www.cnblogs.com/ttinfo/archive/2006/10/31/545741.html

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