用C#实现智能设备上的NotifyIcon类

王朝c#·作者佚名  2008-05-30
窄屏简体版  字體: |||超大  

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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