风舞残阳 2008-4-2 13:42
用C#实现智能设备上的NotifyIcon类
前几天有网友问.NETCF中怎么实现NotifyIcon,我这才知道原来.NETCF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.NETCF支持不支持这两个东东了。仔细看了一下.NETCF中可疑的命名[wiki]空间[/wiki],没想到在Microsoft.WindowsCE.Forms命名空间里面竟然有一个MessageWindow[wiki]类[/wiki],太好了,只剩下一个Shell_NotifyIcon函数了。接着在WindowCE的SDK的帮助文件里,又发现WindowCEPlatformAPI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")]
internalstaticexternintShell_NotifyIcon(intdwMessage,refNOTIFYICONDATApnid);
其中,NOTIFYICONDATA结构如下:
structNOTIFYICONDATA
{
intcbSize;
IntPtrhWnd;
uintuID;
uintuFlags;
uintuCallbackMessage;
IntPtrhIcon;
}
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:
[color=#0000ff]http://www.cnblogs.com/Files/ttinfo/NotifyIconCf.rar[/color]
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:
usingSystem;
usingSystem.Runtime.InteropServices;
usingSystem.Windows.Forms;
namespaceNotifyClient
{
/**////%26lt;summary%26gt;
///智能设备托盘图标类
///%26lt;/summary%26gt;
publicclassNotifyIcon
{
//单击事件
publiceventSystem.EventHandlerClick;
privateMyMessageWindowmessageWindow;
privateintuID=5000;
privateSystem.Drawing.Icon_Icon;
publicNotifyIcon()
{
messageWindow=newMyMessageWindow(this);
messageWindow.uID=uID;
}
publicSystem.Drawing.IconIcon
{
set
{
_Icon=value;
}
}
"NotifyIcon()
{
Remove();
}
/**////%26lt;summary%26gt;
///添加托盘图标
///%26lt;/summary%26gt;
///%26lt;paramname="hIcon"%26gt;icon文件的有效句柄%26lt;/param%26gt;
publicvoidAdd(IntPtrhIcon)
{
NotifyMessage(messageWindow.Hwnd,NIM_ADD,(uint)uID,hIcon);
}
/**////%26lt;summary%26gt;
///添加托盘图标
///%26lt;/summary%26gt;
///%26lt;paramname="IconRes"%26gt;编译之后的资源文件中的icon资源名称,如“#201547”%26lt;/param%26gt;
publicvoidAdd(stringIconRes)
{
IntPtrhIcon=LoadIcon(GetModuleHandle(null),IconRes);
NotifyMessage(messageWindow.Hwnd,NIM_ADD,(uint)uID,hIcon);
}
/**////%26lt;summary%26gt;
///添加托盘图标
///%26lt;/summary%26gt;
///%26lt;paramname="icon"%26gt;icon文件%26lt;/param%26gt;
publicvoidAdd(System.Drawing.Iconicon)
{
NotifyMessage(messageWindow.Hwnd,NIM_ADD,(uint)uID,icon.Handle);
}
/**////%26lt;summary%26gt;
///添加托盘图标;icon为属性中的icon
///%26lt;/summary%26gt;
publicvoidAdd()
{
if(_Icon!=null)
{
NotifyMessage(messageWindow.Hwnd,NIM_ADD,(uint)uID,_Icon.Handle);
}
}
publicvoidRemove()
{
NotifyMessage(messageWindow.Hwnd,NIM_DELETE,(uint)uID,IntPtr.Zero);
}
publicvoidModify(IntPtrhIcon)
{
NotifyMessage(messageWindow.Hwnd,NIM_MODIFY,(uint)uID,hIcon);
}
privatevoidNotifyMessage(IntPtrhwnd,intdwMessage,uintuID,IntPtrhIcon)
{
NOTIFYICONDATAnotdata=newNOTIFYICONDATA();
notdata.cbSize=152;
notdata.hIcon=hIcon;
notdata.hWnd=hwnd;
notdata.uCallbackMessage=WM_NOTIFY_TRAY;
notdata.uFlags=NIF_MESSAGE│NIF_ICON;
notdata.uID=uID;
intret=Shell_NotifyIcon(dwMessage,refnotdata);
}
API#regionAPI
//定义消息常量
constintNIF_MESSAGE=0x00000001;
constintNIF_ICON=0x00000002;
internalconstintWM_LBUTTONDOWN=0x0201;
internalconstintNIM_ADD=0x00000000;
internalconstintNIM_MODIFY=0x00000001;
internalconstintNIM_DELETE=0x00000002;
//自定义消息
internalconstintWM_NOTIFY_TRAY=0x0400+2001;
internalstructNOTIFYICONDATA
{
internalintcbSize;
internalIntPtrhWnd;
internaluintuID;
internaluintuFlags;
internaluintuCallbackMessage;
internalIntPtrhIcon;
}
[DllImport("coredll.dll")]
internalstaticexternintShell_NotifyIcon(
intdwMessage,refNOTIFYICONDATApnid);
[DllImport("coredll.dll")]
internalstaticexternintSetForegroundWindow(IntPtrhWnd);
[DllImport("coredll.dll")]
internalstaticexternintShowWindow(
IntPtrhWnd,
intnCmdShow);
[DllImport("coredll.dll")]
internalstaticexternIntPtrGetFocus();
[DllImport("coredll.dll")]
internalstaticexternIntPtrLoadIcon(IntPtrhInst,stringIconName);
[DllImport("coredll.dll")]
internalstaticexternIntPtrGetModuleHandle(StringlpModuleName);
#endregion
MessageWindow#regionMessageWindow
internalclassMyMessageWindow:Microsoft.WindowsCE.Forms.MessageWindow
{
privateint_uID=0;
privateNotifyIconnotifyIcon;
publicMyMessageWindow(NotifyIconnotIcon)
{
notifyIcon=notIcon;
}
publicintuID
{
set
{
_uID=value;
}
}
protectedoverridevoidWndProc(refMicrosoft.WindowsCE.Forms.Messagemsg)
{
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
}
}