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ZT文萃 — Sun, 27 Apr 2014 03:12:00 GMT

转蝲自：(x��)

http://chenyu-hz.iteye.com/blog/1432978

1 JButton 囄��和文字按钮的实现

JButton btn1 = new JButton("打开", new ImageIcon(ImageView.class.getResource("10.png"))) ;

btn1.setHorizontalTextPosition(SwingConstants.CENTER);

btn1.setVerticalTextPosition(SwingConstants.BOTTOM);

效果�?�Q?/p>

2 JButton 囄��透明按钮的实�?/strong>

setLayout(new FlowLayout(FlowLayout.RIGHT, 30, 0));

btn1.setIcon(UIConfig.getImgUrl("常用交易�?png"));

btn1.setRolloverIcon(UIConfig.getImgUrl("常用交易.png"));

btn1.setBorderPainted(false);

btn1.setFocusPainted(false);

btn1.setContentAreaFilled(false);

btn1.setFocusable(true);

btn1.setMargin(new Insets(0, 0, 0, 0));

btn1.setText("常用交易");

3JRadioButton 囄��透明按钮的实�?/strong>

JRadioButton radio = new JRadioButton(UIConfig.getImgUrl("常用交易�?png") );

radio.setContentAreaFilled(false);

radio.setRolloverIcon(UIConfig.getImgUrl("常用交易.png"));

radio.setSelectedIcon(UIConfig.getImgUrl("常用交易.png"));

ZT文萃 2014-04-27 11:12 发表评论

ZT文萃 — Fri, 21 Feb 2014 02:13:00 GMT
转蝲自：(x��)
http://www.cnblogs.com/happyPawpaw/archive/2013/03/27/2984023.html

现提供两�U�方法：(x��)
�Ҏ(gu��)��一�Q?nbsp;
如果你用�q�Toolkit(java.awt.Toolkit)�c�，�q�将是一件很��单的事情�Q?nbsp;
Toolkit tk=Toolkit.getDefaultToolkit()
Image image=tk.createImage("image.gif"); /*image.gif是你的图�?/
this.setIconImage(image);

注意�Q�这个图标一定要是好用的图标�?br />
��p��么简单，看看�Q�已�l�变成你自己的图标了。Toolkit是个很有用类的，提供很多对窗口默认行为的修改�Q�下面随便提一下，怎么把默认的鼠标图标�Ҏ(gu��)��你自��q��图标�Q?nbsp;
Toolkit tk=Toolkit.getDefaultToolkit();
Image img=tk.getImage("mouse.gif"); /*mouse.gif是你的图�?/
Cursor cu=tk.createCustomCursor(img,new Point(10,10),"stick");
this.setCursor(cu);

�Ҏ(gu��)��二：(x��)
用到ImageIcon�c�d��setIconImage�Ҏ(gu��)��?nbsp;
import javax.swing.*;
public class A extends JFrame {
    String image = new String("face.gif"); //建立一个字�W�串保存要用的图标的路径�Q�关于java的�\径请参考其它文�?nbsp;
    ImageIcon test = new ImageIcon(image); //建立一个ImageIcon�c�，产生setIconImage()�Ҏ(gu��)��需要的Image数据

    public A() {
        super("演示自定义标题栏的图标的�Ҏ(gu��)��");
        this.setIconImage(test.getImage()); //讄��标题栏的图标为face.gif
        this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        this.show();
        //this.setTitle("sdfsdf");
        this.setSize(400,200);
    }
    public static void main(String[] args) {
        A jIcon = new A();
    }
}

此法本�h再次��化�ؓ(f��)两条语句�Q?nbsp;
import javax.swing.*;
public class A extends JFrame {
    ImageIcon test = new ImageIcon(new String(face.gif));//�W�一�?nbsp;
    public A() {
        super("演示自定义标题栏的图标的�Ҏ(gu��)��");
        this.setIconImage(test.getImage()); //�W�二�?nbsp;
         this.setSize(400,200);
        this.show();
}
    public static void main(String[] args) {
        A jIcon = new A();
    }
}

ZT文萃 2014-02-21 10:13 发表评论

Java中的LookAndFeel

ZT文萃 — Wed, 12 Feb 2014 02:20:00 GMT

下文转蝲自：(x��)
http://www.cnblogs.com/qixin622/archive/2010/07/23/1784002.html

Java'中的几种Look and Feel
1、Metal风格 (默认)
String lookAndFeel = "javax.swing.plaf.metal.MetalLookAndFeel";
UIManager.setLookAndFeel(lookAndFeel);
2、Windows风格
String lookAndFeel = "com.sun.java.swing.plaf.windows.WindowsLookAndFeel";
UIManager.setLookAndFeel(lookAndFeel);
3、Windows Classic风格
String lookAndFeel = "com.sun.java.swing.plaf.windows.WindowsClassicLookAndFeel";
UIManager.setLookAndFeel(lookAndFeel);
4、Motif风格
String lookAndFeel = "com.sun.java.swing.plaf.motif.MotifLookAndFeel";
UIManager.setLookAndFeel(lookAndFeel);
5、Mac风格 (需要在相关的操作系�l�上方可实现)
String lookAndFeel = "com.sun.java.swing.plaf.mac.MacLookAndFeel";
UIManager.setLookAndFeel(lookAndFeel);
6、GTK风格 (需要在相关的操作系�l�上方可实现)
String lookAndFeel = "com.sun.java.swing.plaf.gtk.GTKLookAndFeel";
UIManager.setLookAndFeel(lookAndFeel);
7、可跨��^台的默认风格
String lookAndFeel = UIManager.getCrossPlatformLookAndFeelClassName();
UIManager.setLookAndFeel(lookAndFeel);
8、当前系�l�的风格
String lookAndFeel = UIManager.getSystemLookAndFeelClassName();
UIManager.setLookAndFeel(lookAndFeel);

在Java中让用户能够动态地更改应用的外观，可以�l�用��h��好地体验�Q�具体的实现方式是：(x��)
1�Q�先使用UIManager.setLookAndFeel(String s)�Ҏ(gu��)��讑֮�对应的外�?
2�Q�再使用SwingUtilities.updateComponentTreeUI(Component c)�Ҏ(gu��)��立刻更新应用的外�?br />�q�两个类均在javax.swing包中

ZT文萃 2014-02-12 10:20 发表评论

C#键盘钩子

ZT文萃 — Wed, 13 Nov 2013 23:56:00 GMT

    本文由xyz8808贡献
    2009-11-26 12:49//定义变量
    public delegate int HookProc(int nCode, Int32 wParam, IntPtr lParam);
    static int hKeyboardHook = 0;
    HookProc KeyboardHookProcedure;
    /*************************
    * 声明API函数
    * ***********************/
    // 安装钩子 �Q�using System.Runtime.InteropServices;�Q?
    [DllImport("user32.dll",CharSet=CharSet.Auto, CallingC.StdCall)]
    public static extern int SetWindowsHookEx(int idHook,HookProc lpfn, IntPtr hInstance, int threadId);
    // 卸蝲钩子
    [DllImport("user32.dll",CharSet=CharSet.Auto, CallingC.StdCall)]
    public static extern bool UnhookWindowsHookEx(int idHook);
    // �l�箋下一个钩�?
    [DllImport("user32.dll",CharSet=CharSet.Auto, CallingC.StdCall)]
    public static extern int CallNextHookEx(int idHook, int nCode, Int32 wParam, IntPtr lParam);
    // 取得当前�U�程�~�号�Q�线�E�钩子需要用刎ͼ�
    [DllImport("kernel32.dll")]
    static extern int GetCurrentThreadId();
    //钩子子程�Q�就是钩子所要做的事�?
    private int KeyboardHookProc(int nCode, Int32 wParam, IntPtr lParam)
    {
    if (nCode >= 0)
    {
    /****************
    //�U�程键盘钩子判断是否按下�?
    Keys keyData = (Keys)wParam;
    if(lParam.ToInt32() > 0)
    {
    // 键盘按下
    }
    if(lParam.ToInt32() < 0)
    {
    // 键盘抬�v
    }
    ****************/
    /****************
    //全局键盘钩子判断是否按下�?
    wParam = = 0x100 // 键盘按下
    wParam = = 0x101 // 键盘抬�v
    ****************/
    KeyMSG m = (KeyMSG) Marshal.PtrToStructure(lParam, typeof(KeyMSG));//键盘
    // 在这里添加你惌��做是事情(比如把键盘nCode记录下来,搞个邮�g发送程序发到自��q��邮箱�?
    return 0;//如果�q�回1�Q�则�l�束消息�Q�这个消息到此�ؓ(f��)止，不再传递。如果返�?或调用CallNextHookEx函数则消息出了这个钩子��l�往下传递，也就是传�l�消息真正的接受�?
    }
    return CallNextHookEx(hKeyboardHook, nCode, wParam, lParam);
    }
    //键盘�l�构
    public struct KeyMSG
    {
    public int vkCode; //键�?
    public int scanCode;
    public int flags;
    public int time;
    public int dwExtraInfo;
    }
    // 安装钩子
    public void HookStart()
    {
    if(hKeyboardHook == 0)
    {
    // 创徏HookProc实例
    KeyboardHookProcedure = new HookProc(KeyboardHookProc);
    // 讄��U�程钩子
    hKeyboardHook = SetWindowsHookEx( 13,KeyboardHookProcedure,Marshal.GetHINSTANCE(Assembly.GetExecutingAssembly().GetModules()[0]),0);
    //************************************
    //键盘�U�程钩子
    //SetWindowsHookEx( 2,KeyboardHookProcedure, IntPtr.Zero, GetCurrentThreadId()); //GetCurrentThreadId()��监视的线�E�ID,你完全可以自己写个方法获取QQ的线�E�哦
    //键盘全局钩子,需要引用空�?using System.Reflection;)
    //SetWindowsHookEx( 13,KeyboardHookProcedure,Marshal.GetHINSTANCE(Assembly.GetExecutingAssembly().GetModules()[0]),0);
    //
    //关于SetWindowsHookEx (int idHook, HookProc lpfn, IntPtr hInstance, int threadId)函数��钩子加入到钩子链表中，说明一下四个参敎ͼ�(x��)
    //idHook 钩子�c�d��Q�即��定钩子监听何种消息�Q�上面的代码中设�?�Q�即监听键盘消息�q�且是线�E�钩子，如果是全局钩子监听键盘消息应设�?3�Q?
    //�U�程钩子监听鼠标消息设�ؓ(f��)7�Q�全局钩子监听鼠标消息设�ؓ(f��)14�?
    //
    //lpfn 钩子子程的地址指针。如果dwThreadId参数�? 或是一个由别的�q�程创徏的线�E�的标识�Q�lpfn必须指向DLL中的钩子子程�?除此以外�Q�lpfn�?
    //以指向当前进�E�的一�D�钩子子�E�代码。钩子函数的入口地址�Q�当钩子钩到��M��消息后便调用�q�个函数�?
    //
    //hInstance应用�E�序实例的句柄。标识包含lpfn所指的子程的DLL。如果threadId 标识当前�q�程创徏的一个线�E�，而且子程代码位于当前
    //�q�程�Q�hInstance必须为NULL。可以很��单的讑֮�其�ؓ(f��)本应用程序的实例句柄�?
    //
    //threadedId 与安装的钩子子程相关联的�U�程的标识符。如果�ؓ(f��)0�Q�钩子子�E�与所有的�U�程兌��Q�即为全局钩子�?
    //************************************
    // 如果讄��钩子��p�|
    if(hKeyboardHook == 0 )
    {
    HookStop();
    throw new Exception("SetWindowsHookEx failed.");
    }
    }
    }
    // 卸蝲钩子
    public void HookStop()
    {
    bool retKeyboard = true;
    if(hKeyboardHook != 0)
    {
    retKeyboard = UnhookWindowsHookEx(hKeyboardHook);
    hKeyboardHook = 0;
    }
    if (!( retKeyboard))
    throw new Exception("UnhookWindowsHookEx failed.");
    }
    //*****************************
    试用了一下，不是很稳定，改回自带�?KeyUp函数了，记录以备�?br />    //自定义类�?br />    public enum HookType
    {
    WH_KEYBOARD = 2
    }
    public delegate int HOOKPROC(int nCode, int wParam, int lParam);
    //接口调用
    [DllImport( "User32.DLL ")]
    public static extern int SendMessage(IntPtr hWnd, uint Msg,int wParam,int lParam);
    [DllImport("kernel32")]
    public static extern int GetCurrentThreadId();
    [DllImport("User32.Dll")]
    public static extern IntPtr FindWindow(string lpClassName, string lpWindowName);
    [DllImport( "user32",CharSet=CharSet.Auto,CallingConvention=CallingConvention.StdCall)]
    public static extern int SetWindowsHookEx(HookType idHook,HOOKPROC lpfn,int hmod,int dwThreadId);
    [DllImport("user32.dll", CharSet = CharSet.Auto,CallingConvention = CallingConvention.StdCall)]
    public static extern int CallNextHookEx(int idHook, int nCode,int wParam,int lParam);
    //函数实现
    public void SetHook()
    {
    SetWindowsHookEx(HookType.WH_KEYBOARD,
    new HOOKPROC(this.MyKeyboardProc),
    0,
    GetCurrentThreadId());
    }
    public int MyKeyboardProc(int nCode, int wParam, int lParam)
    {
    IntPtr ParenthWnd = new IntPtr(0);
    bool isPressed = (((lParam & 0x80000000) == 0) && (nCode==0));
    CallNextHookEx(m_HookHandle, nCode, wParam, lParam); //先把消息发给�pȝ��默认处理队列
    global.lastKeyValue = wParam;
    ParenthWnd = FindWindow( null,"零售业务");
    switch(wParam)
    {
    case 112: //修改数量 F1
    if(isPressed)
    {
    inputType = global.ST_NUM_STP1;
    doKeyWork();
    }
    break;
    case 113: //备注 F2
    if(isPressed)
    {
    inputType = global.ST_REMARK;
    textBoxBZ.Focus();
    textBoxBZ.SelectAll();
    }
    break;
    case 114: //摘要 F3
    if(isPressed)
    {
    inputType = global.ST_ABST;
    textBoxZY.Focus();
    textBoxZY.SelectAll();
    }
    break;
    case 115: //支付 F4
    if(isPressed)
    if((global.saleList == null) || (global.saleList.Length == 0))
    break;
    else
    {
    showProductInfo();
    labelCPZS.Text = global.sAllNum.ToString() + " �?;
    labelYSJE.Text = global.sAllValue.ToString() + " �?;
    labelYHJE.Text = global.sPriValue.ToString() + " �?;
    labelSSJE.Text = global.sDueValue.ToString() + " �?;
    inputType = global.ST_GATHER_STP1;
    textBoxSK.Focus();
    textBoxSK.SelectAll();
    }
    break;
    case 116: //输入产品 F5
    if(isPressed)
    {
    inputType = global.ST_PRODUCT;
    textBoxSPMC.Focus();
    textBoxSPMC.SelectAll();
    }
    break;
    case 117: //开始新订单 F6
    if(isPressed)
    {
    resetSale(); //销售界面复�?br />    }
    break;
    default:
    //CallNextHookEx(m_HookHandle, nCode, wParam, lParam);
    break;
    }
    return(0);
    }
    ///
    /// 清理所有正在��用的资源�?br />    ///
    protected override void Dispose( bool disposing )
    {
    if( disposing )
    {
    if(components != null)
    {
    components.Dispose();
    }
    }
    base.Dispose( disposing );
    }
    C#中键盘钩子的使用
    默认分类 2008-07-05 17:33 阅读53 评论0 字号�Q?大大中中 ��小 public class Win32Hook
    {
    [DllImport("kernel32")]
    public static extern int GetCurrentThreadId();
    [DllImport( "user32",
    CharSet=CharSet.Auto,CallingConvention=CallingConvention.StdCall)]
    public static extern int SetWindowsHookEx(
    HookType idHook,
    HOOKPROC lpfn,
    int hmod,
    int dwThreadId);
    public enum HookType
    {
    WH_KEYBOARD = 2
    }
    public delegate int HOOKPROC(int nCode, int wParam, int lParam);
    public void SetHook()
    {
    // set the keyboard hook
    SetWindowsHookEx(HookType.WH_KEYBOARD,
    new HOOKPROC(this.MyKeyboardProc),
    0,
    GetCurrentThreadId());
    }
    public int MyKeyboardProc(int nCode, int wParam, int lParam)
    {
    //在这里放�|�你的处理代�?return 0;
    }
    }
    使用�Ҏ(gu��)��
    可以在Form的构造函数里攑օ�
    Win32Hook hook = new Win32Hook();
    hook.SetHook();
    C#+低��Windows API钩子拦截键盘输入
    www.diybl.com　旉��Q?010-01-14　作�?匿名 �~�辑:Smi1e 点击�Q�　9 [评论]
    -
    -
    摘要在家里，婴儿和其它动物可能会(x��)重击你的计算机键盘，致��出现各种无法预言的结果。本文中的这个C#�C�Z��应用�E�序��向你展�C�如何基于Windows钩子API来实现在击键造成��M��危害之前捕获它们�?
    一. ��?
    猫和婴儿有很多共同之处。他们都喜欢吃家中养植的植物�Q�都非常讨厌关门。他们也都爱玩弄你的键盘�Q�结果是�Q�你正发送给你的老板的电(sh��)子邮件可能是以半截句子发送出�ȝ��Q�你的Excel帐户也被加入了一些�ؕ七八�p�的内容�Q��ƈ且你�q�没有注意到�Q�当打开Windows资源��理器时�Q�若�q�文件已�l�被�U�d��了回收站�Q?
    其解��x��案是�Q�开发一个应用程序实现如下功能：(x��)只要键盘处于"威胁状�?你就可以�q�行切换�Q��ƈ��保��M��键盘输入�z�d��都不�?x��)造成危害。本文想展示如何使用一�U�低�U�Windows API钩子在一个C#应用�E�序中实现键�?控制"。下图是本文�C�Z��E�序的一个运行快照�?
    �? 背景
    其实�Q�已�l�存在许多有关于Windows钩子的文章和�C�Z��代码�Q��ƈ且已�l�有人编写过与本文几乎一��L(f��ng)��C++�C�Z��E�序。然而，当我搜烦相应的C#应用�E�序的源码时�Q�却扑ֈ�极少�?NET�C�Z��Q�而且没有一个程序能够提供一个方便的自包含的C#�c�R�?
    .NET框架能够使你以托��方式来存取你最�怋�用的键盘事�g�Q�通过KeyPress�Q�KeyUp和KeyDown�Q�。遗憄��是，�q�些事�g都不能被用来停止Windows�l�合键（如Alt+Tab或Windows"开�?键）�Q�从而允许用�?�q�离"某一个应用程序�?
    本文的想法在操作�pȝ��U�上捕获键盘事�g而不是通过框架�U�来实现。�ؓ(f��)此，应用�E�序需要��用Windows API函数来把它自�w�添加到应用�E�序"钩子�?中以监听来自操作�pȝ��的键盘消息。当它收到这�U�类型的消息�Ӟ��该应用程序能够选择性地传递消息，或者进行正常处理，或�?镇压"它以便不再有其它应用�E�序�Q�包括Windows�Q�来影响它。本文正是想解释其实现机理�?
    然而，��h��意，本文中的代码仅适用于基于NT版本的Windows�Q�NT�Q?000和XP�Q�，�q�且无法使用�q�个�Ҏ(gu��)��来停用Ctrl+Alt+Delete。有关于如何实现�q�一点，你可以参考MSDN有关资料�?
    �? 使用代码
    ��Z��易于使用�Q�我在本文中提供了两个独立的zip文�g。一个仅包含KeyboardHook�c�，�q�是本文介绍的重炏V��另一个是一个完整的微��YVisual C# 2005 Express Edition应用�E�序工程�Q�名�?Baby Keyboard Bash"�Q�它实现昄��击键的名字或彩色的�Ş状以响应于击键�?
    �? 实例化类
    键盘钩子是通过keyboard.cs中的KeyboardHook�c�L��建立和管理的。这个类实现了IDisposable接口�Q�因此，实例化它的最��单的�Ҏ(gu��)��是在应用�E�序的Main()�Ҏ(gu��)��中��用using关键字来��装Application.Run()调用。这��确保只要该应用�E�序开始即建立钩子�q�且�Q�更重要的是�Q�当该应用程序结束时立即使这个钩子失效�?
    �q�个�c�d��发一个事件来警告应用�E�序已经有键被按下，因此主表单能够存取在Main()�Ҏ(gu��)��中创建的KeyboardHook实例��显得非帔R��要；最��单的�Ҏ(gu��)��是把�q�个实例存储在一个公共成员变量中�?
    KeyboardHook提供了三�U�构造器来启用或��用某些讄��Q?
    · KeyboardHook()�Q�捕��h��有击键，没有��M��内容传递到Windows或另外的应用�E�序�?
    · KeyboardHook(string param)�Q�把参数串�{换�ؓ(f��)Parameters枚�D中的��g��一�Q�然后调用下面的构造器�Q?
    · KeyboardHook(KeyboardHook.Parameters enum)�Q�根据从Parameters枚�D中选择的值的不同�Q�分别启动下列设�|�：(x��)
    o Parameters.AllowAltTab�Q�允许用户��用Alt+Tab切换到另外的应用�E�序�?
    o Parameters.AllowWindowsKey�Q�允许用户��用Ctrl+Esc或一�U�Windows键存取�Q务栏和开始菜单�?
    o Parameters.AllowAltTabAndWindows�Q�启用Alt+Tab�Q�Ctrl+Esc和W(xu��)indows键�?
    o Parameters.PassAllKeysToNextApp�Q�如果该参数为true�Q�那么所有的击键��被传递给��M��其它监听应用�E�序�Q�包括Windows�Q��?
    当击键��l�被键盘钩子捕获�Ӟ��启用Alt+Tab�?或Windows键允许实际��用该计算��切换到另一个应用程序�ƈ且��用鼠标与之交互。PassAllKeysToNextApp讄��有效地禁用了击键捕获�Q�这个类也是建立一个低�U�键盘钩子�ƈ且引发它的KeyIntercepted事�g�Q�但是它�q�负责把键盘事�g传递到另一个监听程序�?
    因此�Q�实例化该类以捕��h��有击键的�Ҏ(gu��)��如下�Q?
    public static KeyboardHook kh;
    [STAThread]
    static void Main()
    {
    //其它代码
    using (kh = new KeyboardHook())
    {
    Application.Run(new Form1());
    }
    �? 处理KeyIntercepted事�g
    当一外键被按下时�Q�这个KeyboardHook�c�L��z�M��个包含一些KeyboardHookEventArgs的KeyIntercepted事�g。这是通过一个KeyboardHookEventHandler�c�d��的方法��用以下方式来实现的：(x��)
    kh.KeyIntercepted += new KeyboardHook.KeyboardHookEventHandler(kh_KeyIntercepted);
    �q�个KeyboardHookEventArgs�q�回关于被按下键的下列信息：(x��)
    · KeyName�Q�键名，通过把捕��L(f��ng)��键代码强制�{换�ؓ(f��)System.Windows.Forms.Keys而获得�?
    · KeyCode�Q�由键盘钩子�q�回的原来的键代�?
    · PassThrough�Q�指出是否这个KeyboardHook实例被配�|�以允许该击键传递到其它应用�E�序。如果你惛_��怸�用户使用Alt+Tab�?Ctrl+Esc/Windows键切换到其它的应用程序的话，那么对之�q�行��(g��)查是很有用的�?
    然后�Q��用一个具有适当�{�֐�的方法来执行击键所调用的�Q何�Q务。下面是一个示例片断：(x��)
    void kh_KeyIntercepted(KeyboardHookEventArgs e)
    {
    //��(g��)查是否这个键��M��件被传递到其它应用�E�序�q�且停用TopMost�Q�以防他们需要调到前�?br />    if (e.PassThrough)
    {
    this.TopMost = false;
    }
    ds.Draw(e.KeyName);
    }
    本文的剩下部分将解释低��键盘钩子是如何在KeyboardHook中实现的�?
    �? 实现一个低�U�Windows API键盘钩子
    在user32.dll中，W(xu��)indows API包含三个�Ҏ(gu��)��来实现此目的�Q?
    · SetWindowsHookEx�Q�它负责建立键盘钩子
    · UnhookWindowsHookEx�Q�它负责�U�d��键盘钩子
    · CallNextHookEx�Q�它负责把击键信息传递到下一个监听键盘事件的应用�E�序
    创徏一个能够拦截键盘的应用�E�序的关键是�Q�实现前面两个方法，�?攑ּ�"�W�三个。结果是�Q��Q何击键都只能传递到�q�个应用�E�序中�?
    ��Z��实现�q�一目标�Q�第一步是包括System.Runtime.InteropServices命名�I�间�q�且导入API�Ҏ(gu��)��Q�首先是SetWindowsHookEx�Q?
    using System.Runtime.InteropServices
    ……
    //在类内部�Q?br />    [DllImport("user32.dll"�Q?CharSet = CharSet.Auto�Q?SetLastError = true)]
    private static extern IntPtr SetWindowsHookEx(int idHook�Q?br />    LowLevelKeyboardProc lpfn�Q?IntPtr hMod�Q?uint dwThreadId);
    导入UnhookWindowsHookEx和CallNextHookEx的代码请见后面的讨论�?
    下一步是调用SetWindowsHookEx来徏立钩子，�q�时需要传递下列四个参敎ͼ�(x��)
    · idHook�Q?
    �q�个数字军_��了要建立的钩子的�c�d��。例如，SetWindowsHookEx可以被用于钩住鼠标事�Ӟ��当然�q�有其它事�g�Q�。在本文情况下，我们仅对13有兴��，�q�是键盘钩子的id。�ؓ(f��)了��代码更易��M��Q�我们把它赋值给一个常数WH_KEYBOARD_LL�?
    · Lpfn�Q?
    �q�是一个指向函数的长指针，该函数将负责处理键盘事�g。在C#中，"指针"是通过传递一个代理类型的实例而获得的�Q�从而��之引用一个适当的方法。这是我们在每次使用钩子时所调用的方法�?
    �q�里值得注意的是�Q�这个代理实例需要被存储于这个类的一个成员变量中。这是�ؓ(f��)了防止一旦第一个方法调用结束它�?x��)被作��?f��)垃圾回收�?
    · hMod�Q?
    建立钩子的应用程序的一个实例句柄。我扑ֈ�的绝大多数实例仅把它讄��为IntPtr.Zero�Q�理由是不大可能存在该应用程序的多个实例。然而，�q�部分代码��用了来自于kernel32.dll的GetModuleHandle来标识准��的实例从而�ɘq�个�c�L��L(f��ng)��z�L��?
    · dwThreadId�Q?
    当前�q�程的id。把它设�|��ؓ(f��)0可以使这个钩子成为全局构子�Q�这是相应于一个低�U�键盘钩子的正确讄��?
    SetWindowsHookEx�q�回一个钩子id�Q�这个id��被用于当应用程序结束时从钩子链中脱钩，因此它需要存储在一个成员变量中以备��来使用。KeyboardHook�c�M��的相关代码如下：(x��)
    private HookHandlerDelegate proc;
    private IntPtr hookID = IntPtr.Zero;
    private const int WH_KEYBOARD_LL = 13;
    public KeyboardHook()
    {
    proc = new HookHandlerDelegate(HookCallback);
    using (Process curProcess = Process.GetCurrentProcess())
    using (ProcessModule curModule = curProcess.MainModule)
    {
    hookID = SetWindowsHookEx(WH_KEYBOARD_LL�Q?proc�Q�GetModuleHandle(curModule.ModuleName)�Q?0);
    }
    }
    �? 处理键盘事�g
    如前面所提及(qi��ng)�Q�SetWindowsHookEx需要一个到被用来处理键盘事件的回调函数的指针。它期望有一个��用如下签名的函数�Q?
    LRESULT CALLBACK LowLevelKeyboardProc( int nCode�Q�W(xu��)PARAM wParam�Q�LPARAM lParam);
    其实�Q�徏立一个函数指针的C#�Ҏ(gu��)��使用了一个代理，因此�Q�向SetWindowsHookEx指出它需要的内容的第一步是使用正确的签名来声明一个代理：(x��)
    private delegate IntPtr HookHandlerDelegate(int nCode�Q?IntPtr wParam�Q?ref KBDLLHOOKSTRUCT lParam);
    然后�Q��用相同的�{�֐��~�写一个回调方法；�q�个�Ҏ(gu��)��包含实际上处理键盘事�g的所有代码。在KeyboardHook的情况下�Q�它��(g��)查是否击键应该被传递给其它应用�E�序�q�且接下来激发KeyIntercepted事�g。下面是一个简化版本的不带有击键处理代码的情况�Q?
    private const int WM_KEYDOWN = 0x0100;
    private const int WM_SYSKEYDOWN = 0x0104;
    private IntPtr HookCallback(int nCode�Q?IntPtr wParam�Q?ref KBDLLHOOKSTRUCT lParam)
    {
    //仅�ؓ(f��)KeyDown事�g�q��o(h��)wParam�Q�否则该代码��再�ơ执�?对于每一�ơ击键（也就是，相应于KeyDown和KeyUp�Q?br />    //WM_SYSKEYDOWN是捕获Alt相关�l�合键所必需�?br />    if (nCode >= 0 && (wParam == (IntPtr)WM_KEYDOWN || wParam == (IntPtr)WM_SYSKEYDOWN))
    {
    //�Ȁ发事�?br />    OnKeyIntercepted(new KeyboardHookEventArgs(lParam.vkCode�Q?AllowKey));
    //�q�回一�?�?��g��捕获击键
    return (System.IntPtr)1;
    }
    //事�g没有被处理，把它传递给下一个应用程�?br />    return CallNextHookEx(hookID�Q?nCode�Q?wParam�Q?ref lParam);
    }
    接下来，一个到HookCallback的参考被指派�l�HookHandlerDelegate的一个实例�ƈ且被传递到SetWindowsHookEx的调用，正如前一节所展示的�?
    无论何时一个键盘事件发生，下列参数��被传递给HookCallBack�Q?
    · nCode:
    �Ҏ(gu��)��MSDN文档�Q�回调函数应该返回CallNextHookEx的结果，如果�q�个值小于零的话。正常的键盘事�g��返回一个大于或�{�于零的nCode倹{�?
    · wParam:
    �q�个值指�C�发生了什么类型的事�g�Q�键被按下还是松开�Q�以�?qi��ng)是否按下的键是一个系�l�键�Q�左�Ҏ(gu��)��双��的Alt键）�?
    · lParam:
    �q�是一个存储精��击键信息的�l�构�Q�例如被按键的代码。在KeyboardHook中声明的�q�个�l�构如下�Q?
    private struct KBDLLHOOKSTRUCT
    {
    public int vkCode;
    int scanCode;
    public int flags;
    int time;
    int dwExtraInfo;
    }
    其中的这两个公共参数是在KeyboardHook中的回调�Ҏ(gu��)��所使用的仅有的两个参数。vkCoke�q�回虚拟键代码，它能够被强制转换为System.Windows.Forms.Keys以获得键名，而flags昄��是否�q�是一个扩展键�Q�例如，W(xu��)indows Start键）或是否同时按下了Alt键。有关于Hook回调�Ҏ(gu��)��的完整代码展�C�在每一�U�情况下要检查哪些flags倹{�?
    如果flags提供的信息和KBDLLHOOKSTRUCT的其它组成元素不需要，那么�q�个回调�Ҏ(gu��)��和代码的�{�֐�可以按如下进行修改：(x��)
    private delegate IntPtr HookHandlerDelegate(
    int nCode�Q?IntPtr wParam�Q?IntPtr lParam);
    在这�U�情况中�Q�lParam��仅�q�回vkCode�?
    �? 把击键传递到下一个应用程�?
    一个良好的键盘钩子回调�Ҏ(gu��)��应该以调用CallNextHookEx函数�q�且�q�回它的�l�果�l�束。这可以��保其它应用�E�序能够有机�?x��)处理针对于它们的击键�?
    然而，KeyboardHook�cȝ��主要功能在于�Q�阻止击键被传播��C�Q何其它更多的应用�E�序。因此它无论在何时处理一�ơ击键，HookCallback都将�q�回一个哑��|��(x��)
    return (System.IntPtr)1;
    另一斚w��Q�它��实调用CallNextHookEx-如果它不处理该事�Ӟ��或如果重载的构造器中的使用KeyboardHook传递的参数允许某些�l�合键通过�?
    CallNextHookEx被启�?通过从user32.dll导入该函敎ͼ�如下列代码所�C�：(x��)
    [DllImport("user32.dll"�Q?CharSet = CharSet.Auto�Q?SetLastError = true)]
    private
    static extern IntPtr CallNextHookEx(IntPtr hhk�Q?int nCode�Q?br />    IntPtr wParam�Q?ref KeyInfoStruct lParam);
    然后�Q�被导入的方法被HookCallMethod所调用�Q�这可以��保所有的通过钩子接收到的参数被��l�传递到下一个应用程序中�Q?
    CallNextHookEx(hookID�Q?nCode�Q?wParam�Q?ref lParam);
    如前面所提及(qi��ng)�Q�如果在lParam中的flags是不相关的，那么可以修改导入的CallNextHookEx的签名以把lParam定义为System.IntPtr�?
    �? �U�d��钩子
    处理钩子的最后一步是使用从user32.dll中导入的UnhookWindowsHookEx函数�U�d��它（当破坏KeyboardHook�cȝ��实例�Ӟ��Q�如下所�C�：(x��)
    [DllImport("user32.dll"�Q?CharSet = CharSet.Auto�Q?SetLastError = true)]
    [return: MarshalAs(UnmanagedType.Bool)]
    private static extern bool UnhookWindowsHookEx(IntPtr hhk);
    既然KeyboardHook实现IDisposable�Q�那么这可以在Dispose�Ҏ(gu��)��中完成�?
    public void Dispose()
    {
    UnhookWindowsHookEx(hookID);
    }
    hookID是构造器在调用SetWindowsHookEx所�q�回的id。这��从钩子链中删除应用�E�序�?br />    c#键盘钩子
    作�? lzh �c�d��: C#/VB 日期: 2003-5-27 22:22:19
    You can use system hook to hook any messages send to the application.
    Hooking the keyboard (WH_KEYBOARD) and mouse (WH_MOUSE) messages can be
    used to determine if the user interactive with the computer. You also can
    hook all the messages (WH_GETMESSAGE). The hook can be set with this code:
    public class Win32Hook
    {
    [DllImport("kernel32")]
    public static extern int GetCurrentThreadId();
    [DllImport( "user32",
    CharSet=CharSet.Auto,CallingConvention=CallingConvention.StdCall)]
    public static extern int SetWindowsHookEx(
    HookType idHook,
    HOOKPROC lpfn,
    int hmod,
    int dwThreadId);
    public enum HookType
    {
    WH_GETMESSAGE = 3
    }
    public delegate int HOOKPROC(int nCode, int wParam, int lParam);
    public void SetHook()
    {
    // set the keyboard hook
    SetWindowsHookEx(HookType.WH_GETMESSAGE,
    new HOOKPROC(this.MyKeyboardProc),
    0,
    GetCurrentThreadId());
    }
    public int MyKeyboardProc(int nCode, int wParam, int lParam)
    {
    //Perform your process
    return 0;
    }
    }
    Then you can install the hook procedure by the following code:
    Win32Hook hook = new Win32Hook();
    hook.SetHook();
    用钩�?hook)实现C#的屏�q�键盘效�?br />    -
    SVN技术网 www.svn8.com 2010-01-20 08:38:02 来源:bbs.svn8.com 作�?佚名点击:158��?
    文章摘要�Q�用钩子(hook)实现C#的屏�q�键盘效�?要实��C��个屏�q�键盘，需要监听所有键盘事�Ӟ��无论�H�体是否被激�z�R��因此需要一个全局的钩子，也就是系�l�范围的钩子�?什么是钩子�Q�Hook�Q?钩子�Q�Hook�Q�是Windows提供的一�U�消息处理机制��^収ͼ�是指在程序正常运行中接受信息之前预先启动的函敎ͼ�用来��(g��)查和修改传给该程序的信息�Q�（钩子�Q?
    -
    使用完钩子后�Q�要�q�行卸蝲�Q�这个可以写在析构函��C��?br />    12 public void Stop() {3 this.Stop(true, true, true);4 }5 6 public void Stop(bool uninstallMouseHook, bool uninstallKeyboardHook, 7 bool throwExceptions) {8 // if mouse hook set and must be uninstalled9 if (hMouseHook != IntPtr.Zero && uninstallMouseHook) {10 // uninstall hook11 bool retMouse = UnhookWindowsHookEx(hMouseHook);12 // reset invalid handle13 hMouseHook = IntPtr.Zero;14 // if failed and exception must be thrown15 if (retMouse == false && throwExceptions) {16 // Returns the error code returned by the last unmanaged function 17 // called using platform invoke that has the DllImportAttribute.18 // SetLastError flag set. 19 int errorCode = Marshal.GetLastWin32Error();20 // Initializes and throws a new instance of the Win32Exception class 21 // with the specified error. 22 throw new Win32Exception(errorCode);23 }24 }2526 // if keyboard hook set and must be uninstalled27 if (hKeyboardHook != IntPtr.Zero && uninstallKeyboardHook) {28 // uninstall hook29 bool retKeyboard = UnhookWindowsHookEx(hKeyboardHook);30 // reset invalid handle31 hKeyboardHook = IntPtr.Zero;32 // if failed and exception must be thrown33 if (retKeyboard == false && throwExceptions) {34 // Returns the error code returned by the last unmanaged function 35 // called using platform invoke that has the DllImportAttribute.36 // SetLastError flag set. 37 int errorCode = Marshal.GetLastWin32Error();38 // Initializes and throws a new instance of the Win32Exception class 39 // with the specified error. 40 throw new Win32Exception(errorCode);41 }42 }43 }44
    ��这个文件编译成一个dll�Q�即可在应用�E�序中调用。通过它提供的事�g�Q�便可监听所有的键盘事�g�?br />    但是�Q�这只能监听键盘事�g�Q�没有键盘的情况下，怎么�?x��)有键盘事�g�Q�其实很��单，通过SendInput
    API函数提供虚拟键盘代码的调用即可模拟键盘输入。下面的代码模拟一�?KeyDown �?KeyUp �q�程�Q?br />    把他们连接�v来就是一�ơ按键过�E��?br />    1 private void SendKeyDown(short key) {2 Input[] input = new Input[1];3 input[0].type = INPUT.KEYBOARD;4 input[0].ki.wVk = key;5 input[0].ki.time = NativeMethods.GetTickCount();67 if (NativeMethods.SendInput((uint)input.Length, input, Marshal.SizeOf(input[0])) 8 < input.Length) {9 throw new Win32Exception(Marshal.GetLastWin32Error());10 }11 }1213 private void SendKeyUp(short key) {14 Input[] input = new Input[1];15 input[0].type = INPUT.KEYBOARD;16 input[0].ki.wVk = key;17 input[0].ki.dwFlags = KeyboardConstaint.KEYEVENTF_KEYUP;18 input[0].ki.time = NativeMethods.GetTickCount();1920 if (NativeMethods.SendInput((uint)input.Length, input, Marshal.SizeOf(input[0]))21 < input.Length) {22 throw new Win32Exception(Marshal.GetLastWin32Error());23 }24 }
    自己实现一�?KeyBoardButton 控�g用作按钮�Q�用 Visual Studio 或�?SharpDevelop 为屏�q�键盘设�?UI�Q�然�?br />    在这�?Button �?Click 事�g里面模拟一个按键过�E��?br />    12 private void ButtonOnClick(object sender, EventArgs e) {3 KeyboardButton btnKey = sender as KeyboardButton;4 if (btnKey == null) {5 return;6 }78 SendKeyCommand(btnKey);9 }10 11 private void SendKeyCommand(KeyboardButton keyButton) {12 short key = keyButton.VKCode;13 if (combinationVKButtonsMap.ContainsKey(key)) {14 if (keyButton.Checked) {15 SendKeyUp(key);16 } else {17 SendKeyDown(key);18 }19 } else {20 SendKeyDown(key);21 SendKeyUp(key);22 }23 }
    其中 combinationVKButtonsMap 是一�?IDictionary>, key 存储的是VK_SHIFT, VK_CONTROL �{�组合键的键盘码。左右两个按钮对应同一个键盘码�Q�因此需要放在一�?List 里�?br />    标准键盘上的每一个键都有虚拟键码( VK_CODE)与之对应。还有一些其他的帔R��Q?br />    把它写在一个静�?class 里吧�?br />    1 // KeyboardConstaint.cs2 internal static class KeyboardConstaint {3 internal static readonly short VK_F1 = 0x70;4 internal static readonly short VK_F2 = 0x71;5 internal static readonly short VK_F3 = 0x72;6 internal static readonly short VK_F4 = 0x73;7 internal static readonly short VK_F5 = 0x74;8 internal static readonly short VK_F6 = 0x75;9 internal static readonly short VK_F7 = 0x76;10 internal static readonly short VK_F8 = 0x77;11 internal static readonly short VK_F9 = 0x78;12 internal static readonly short VK_F10 = 0x79;13 internal static readonly short VK_F11 = 0x7A;14 internal static readonly short VK_F12 = 0x7B;1516 internal static readonly short VK_LEFT = 0x25;17 internal static readonly short VK_UP = 0x26;18 internal static readonly short VK_RIGHT = 0x27;19 internal static readonly short VK_DOWN = 0x28;2021 internal static readonly short VK_NONE = 0x00;22 internal static readonly short VK_ESCAPE = 0x1B;23 internal static readonly short VK_EXECUTE = 0x2B;24 internal static readonly short VK_CANCEL = 0x03;25 internal static readonly short VK_RETURN = 0x0D;26 internal static readonly short VK_ACCEPT = 0x1E;27 internal static readonly short VK_BACK = 0x08;28 internal static readonly short VK_TAB = 0x09;29 internal static readonly short VK_DELETE = 0x2E;30 internal static readonly short VK_CAPITAL = 0x14;31 internal static readonly short VK_NUMLOCK = 0x90;32 internal static readonly short VK_SPACE = 0x20;33 internal static readonly short VK_DECIMAL = 0x6E;34 internal static readonly short VK_SUBTRACT = 0x6D;3536 internal static readonly short VK_ADD = 0x6B;37 internal static readonly short VK_DIVIDE = 0x6F;38 internal static readonly short VK_MULTIPLY = 0x6A;39 internal static readonly short VK_INSERT = 0x2D;4041 internal static readonly short VK_OEM_1 = 0xBA; // ';:' for US42 internal static readonly short VK_OEM_PLUS = 0xBB; // '+' any country4344 internal static readonly short VK_OEM_MINUS = 0xBD; // '-' any country4546 internal static readonly short VK_OEM_2 = 0xBF; // '/?' for US47 internal static readonly short VK_OEM_3 = 0xC0; // '`~' for US48 internal static readonly short VK_OEM_4 = 0xDB; // '[{' for US49 internal static readonly short VK_OEM_5 = 0xDC; // '\|' for US50 internal static readonly short VK_OEM_6 = 0xDD; // ']}' for US51 internal static readonly short VK_OEM_7 = 0xDE; // ''"' for US52 internal static readonly short VK_OEM_PERIOD = 0xBE; // '.>' any country53 internal static readonly short VK_OEM_COMMA = 0xBC; // ',<' any country54 internal static readonly short VK_SHIFT = 0x10;55 internal static readonly short VK_CONTROL = 0x11;56 internal static readonly short VK_MENU = 0x12;57 internal static readonly short VK_LWIN = 0x5B;58 internal static readonly short VK_RWIN = 0x5C;59 internal static readonly short VK_APPS = 0x5D;6061 internal static readonly short VK_LSHIFT = 0xA0;62 internal static readonly short VK_RSHIFT = 0xA1;63 internal static readonly short VK_LCONTROL = 0xA2;64 internal static readonly short VK_RCONTROL = 0xA3;65 internal static readonly short VK_LMENU = 0xA4;66 internal static readonly short VK_RMENU = 0xA5;6768 internal static readonly short VK_SNAPSHOT = 0x2C;69 internal static readonly short VK_SCROLL = 0x91;70 internal static readonly short VK_PAUSE = 0x13;71 internal static readonly short VK_HOME = 0x24;7273 internal static readonly short VK_NEXT = 0x22;74 internal static readonly short VK_PRIOR = 0x21;75 internal static readonly short VK_END = 0x23;7677 internal static readonly short VK_NUMPAD0 = 0x60;78 internal static readonly short VK_NUMPAD1 = 0x61;79 internal static readonly short VK_NUMPAD2 = 0x62;80 internal static readonly short VK_NUMPAD3 = 0x63;81 internal static readonly short VK_NUMPAD4 = 0x64;82 internal static readonly short VK_NUMPAD5 = 0x65;83 internal static readonly short VK_NUMPAD5NOTHING = 0x0C;84 internal static readonly short VK_NUMPAD6 = 0x66;85 internal static readonly short VK_NUMPAD7 = 0x67;86 internal static readonly short VK_NUMPAD8 = 0x68;87 internal static readonly short VK_NUMPAD9 = 0x69;8889 internal static readonly short KEYEVENTF_EXTENDEDKEY = 0x0001;90 internal static readonly short KEYEVENTF_KEYUP = 0x0002;9192 internal static readonly int GWL_EXSTYLE = -20;93 internal static readonly int WS_DISABLED = 0X8000000;94 internal static readonly int WM_SETFOCUS = 0X0007;95 }
    文章来自[SVN中文技术网]转发请保留本站地址�Q�http://www.svn8.com/dotnet/Csharp/2010012018328_2.html
    C#中键盘钩子的使用�Q��{)
    public class Win32Hook
    {
    [DllImport("kernel32")]
    public static extern int GetCurrentThreadId();
    [DllImport( "user32",
    CharSet=CharSet.Auto,CallingConvention=CallingConvention.StdCall)]
    public static extern int SetWindowsHookEx(
    HookType idHook,
    HOOKPROC lpfn,
    int hmod,
    int dwThreadId);
    public enum HookType
    {
    WH_KEYBOARD = 2
    }
    public delegate int HOOKPROC(int nCode, int wParam, int lParam);
    public void SetHook()
    {
    // set the keyboard hook
    SetWindowsHookEx(HookType.WH_KEYBOARD,
    new HOOKPROC(this.MyKeyboardProc),
    0,
    GetCurrentThreadId());
    }
    public int MyKeyboardProc(int nCode, int wParam, int lParam)
    {
    //在这里放�|�你的处理代�?return 0;
    }
    }
    使用�Ҏ(gu��)��
    可以在Form的构造函数里攑օ�
    Win32Hook hook = new Win32Hook();
    hook.SetHook();

ZT文萃 2013-11-14 07:56 发表评论

c#键盘钩子

ZT文萃 — Wed, 13 Nov 2013 06:21:00 GMT

http://wuqinzhong.blog.163.com/blog/static/45222312009101711583439/

c#键盘钩子

2009-11-17 11:58:34|  分类�Q? C# |字号订阅

c#键盘钩子�Q?
    public class Win32Hook
    {
        [DllImport("kernel32")]
        public static extern int GetCurrentThreadId();
        [DllImport("user32",CharSet = CharSet.Auto, CallingConvention = CallingConvention.StdCall)]
        public static extern int SetWindowsHookEx(HookType idHook, HOOKPROC lpfn, int hmod, int dwThreadId);
        [DllImport("user32", CharSet = CharSet.Auto, CallingConvention = CallingConvention.StdCall)]
        public static extern int CallNextHookEx(int hhk,int nCode,int wParam,int lParam);
        [DllImport("user32", CharSet = CharSet.Auto, CallingConvention = CallingConvention.StdCall)]
        public static extern bool UnHookWindowsHookEx(int hhk);
        public enum HookType
        {
            WH_KEYBOARD = 2
        }
        public delegate int HOOKPROC(int nCode, int wParam, int lParam);
        public int hhk;
        public void SetHook()
        {
            // set the keyboard hook
            hhk = SetWindowsHookEx(HookType.WH_KEYBOARD, new HOOKPROC(this.MyKeyboardProc), 0, GetCurrentThreadId());
        }
        public int MyKeyboardProc(int nCode, int wParam, int lParam)
        {
            //在这里放�|�你的处理代�?br />            int iresult = 0;
            if (nCode<=0)
            {
                iresult = CallNextHookEx(hhk, nCode, wParam, lParam);
                return iresult;
            }
            if ((wParam >= 48 && wParam<=57)||(wParam >= 65 && wParam<=90)||(wParam >= 97 && wParam<=122))
            {
                Form1.rrrr += Convert.ToChar(wParam);
                return 0;
            }
            return 0;
        }
        public bool UnHook()
        {
           return UnHookWindowsHookEx(hhk);
        }
    }
使用�Q?
Win32Hook hook = new Win32Hook();
            hook.SetHook();
            this.richTextBox2.Text = rrrr;
            hook.UnHook();
参考：(x��)http://baike.baidu.com/view/1208620.htm
使用参照�Q?a rel="nofollow" >http://www.codeproject.com/KB/system/globalsystemhook.aspx
             (adamhtmei)

ZT文萃 2013-11-13 14:21 发表评论

ZT文萃 — Wed, 09 Oct 2013 07:23:00 GMT

jQuery获取Select选择的Text和Value:
语法解释�Q?br />1. $("#select_id").change(function(){//code...});   //为Select��d��事�g�Q�当选择其中一��Ҏ(gu��)��触发
2. var checkText=$("#select_id").find("option:selected").text();   //获取Select选择的Text
3. var checkValue=$("#select_id").val();   //获取Select选择的Value
4. var checkIndex=$("#select_id ").get(0).selectedIndex;   //获取Select选择的烦引�?br />5. var maxIndex=$("#select_id option:last").attr("index");   //获取Select最大的索引�?br />jQuery讄��Select选择�?nbsp;Text和Value:
语法解释�Q?br />1. $("#select_id ").get(0).selectedIndex=1;  //讄��Select索引��gؓ(f��)1的项选中
2. $("#select_id ").val(4);    // 讄��Select的Value��gؓ(f��)4的项选中
3. $("#select_id option[text='jQuery']").attr("selected", true);   //讄��Select的Text��gؓ(f��)jQuery的项选中
jQuery��d��/删除Select的Option��：(x��)
语法解释�Q?br />1. $("#select_id").append("Text");   //为Select�q�加一个Option(下拉��?
2. $("#select_id").prepend("请选择");  //为Select插入一个Option(�W�一个位�|?
3. $("#select_id option:last").remove();  //删除Select中烦引值最大Option(最后一�?
4. $("#select_id option[index='0']").remove();  //删除Select中烦引��gؓ(f��)0的Option(�W�一�?
5. $("#select_id option[value='3']").remove();   //删除Select中Value='3'的Option
5. $("#select_id option[text='4']").remove();   //删除Select中Text='4'的Option
http://www.cnblogs.com/SAL2928/archive/2008/10/28/1321285.html
jquery radio取��|��checkbox取��|��select取��|��radio选中�Q�checkbox选中�Q�select选中�Q�及(qi��ng)其相�?nbsp;
�?nbsp; 取一�l�radio被选中��的�?nbsp;
var item = $('input[name=items][checked]').val();
�?nbsp; 取select被选中��的文本
var item = $("select[name=items] option[selected]").text();
select下拉框的�W�二个元素�ؓ(f��)当前选中�?nbsp;
$('#select_id')[0].selectedIndex = 1;
radio单选组的第二个元素为当前选中�?nbsp;
$('input[name=items]').get(1).checked = true;
获取��|��(x��)
文本框，文本区域�Q?("#txt").attr("value")�Q?nbsp;
多选框 checkbox�Q?("#checkbox_id").attr("value")�Q?nbsp;
单选组radio�Q?nbsp;   $("input[type=radio][checked]").val();
下拉框select�Q?nbsp;$('#sel').val();
控制表单元素�Q?nbsp;
文本框，文本区域�Q?("#txt").attr("value",'');//清空内容
$("#txt").attr("value",'11');//填充内容
多选框checkbox�Q?nbsp; $("#chk1").attr("checked",'');//不打�?nbsp;
$("#chk2").attr("checked",true);//打勾
if($("#chk1").attr('checked')==undefined) //判断是否已经打勾
单选组 radio�Q?nbsp;    $("input[type=radio]").attr("checked",'2');//讄��value=2的项目�ؓ(f��)当前选中��?nbsp;
下拉�?nbsp; select�Q?nbsp;  $("#sel").attr("value",'-sel3');//讄��value=-sel3的项目�ؓ(f��)当前选中��?nbsp;
$("11112222").appendTo("#sel")//��d��下拉框的option
$("#sel").empty()�Q?/清空下拉�?nbsp;
----------------------------------------------------------------------------------------------------
//遍历option和添加、移除option
function changeShipMethod(shipping){
var len = $("select[name=ISHIPTYPE] option").length
if(shipping.value != "CA"){
$("select[name=ISHIPTYPE] option").each(function(){
if($(this).val() == 111){
$(this).remove();
}
});
}else{
$("UPS Ground").appendTo($("select[name=ISHIPTYPE]"));
}
}
//取得下拉選單的選取�?nbsp;
$(#testSelect option:selected').text();
�?("#testSelect").find('option:selected').text();
�?("#testSelect").val();
//////////////////////////////////////////////////////////////////
�?nbsp; 性不好的可以收藏下：(x��)
1,下拉�?
var cc1 = $(".formc select[name='country'] option[selected]").text(); //得到下拉菜单的选中��的文本(注意中间有空�?
var cc2 = $('.formc select[name="country"]').val(); //得到下拉菜单的选中��的�?br />var cc3 = $('.formc select[name="country"]').attr("id"); //得到下拉菜单的选中��的ID属性�?br />$("#select").empty();//清空下拉�?nbsp; //$("#select").html('');
$("1111").appendTo("#select")//��d��下拉框的option
�E�微解释一�?
1.select[name='country'] option[selected] 表示��h��name 属性，
�q?nbsp;且该属性��gؓ(f��)'country' 的select元素里面的具有selected 属性的option 元素�Q?nbsp;
2,单选框:
$("input[@type=radio][@checked]").val(); //得到单选框�?nbsp; 选中��的�?注意中间没有�I�格)
$("input[@type=radio][@value=2]").attr("checked",'checked'); //讄��单选框value=2的�ؓ(f��)选中状�?(注意中间没有�I�格)
3,复选框:
$("input[@type=checkbox][@checked]").val(); //得到复选框的选中的第一��的�?br />$("input[@type=checkbox][@checked]").each(function() { //�׃��复选框一般选中的是多个,所以可以��@环输�?br />alert($(this).val());
});
$("#chk1").attr("checked",'');//不打�?br />$("#chk2").attr("checked",true);// 打勾
if($("#chk1").attr('checked')==undefined){} //判断是否已经打勾
当然jquery的选择器是强大�? �q�有很多�Ҏ(gu��)��.

$(document).ready(function(){
$("#selectTest").change(function()
{
//alert("Hello");
//alert($("#selectTest").attr("name"));
//$("a").attr("href","xx.html");
//window.location.href="xx.html";
//alert($("#selectTest").val());
alert($("#selectTest option[@selected]").text());
$("#selectTest").attr("value", "2");
});
});

aaass