C# 如何关联键盘按钮 （KeyChar/KeyCode值 KeyPress/KeyDown事件 区别）



1. 首先将窗口属性KeyPreview设为true，如果属性对话框中找不到，就直接在代码里添加；
2. 添加KeyPress / KeyDown事件：


KeyPress 和KeyDown 、KeyPress之间的区别：
    1）.KeyPress主要用来捕获数字(注意：包括Shift+数字的符号)、字母（注意：包括大小写）、小键盘等除了F1-12、SHIFT、Alt、Ctrl、Insert、Home、PgUp、Delete、End、PgDn、ScrollLock、Pause、NumLock、{菜单键}、{开始键}和方向键外的ANSI字符
        KeyDown 和KeyUp 通常可以捕获键盘除了PrScrn所有按键(这里不讨论特殊键盘的特殊键）
    2）.KeyPress 只能捕获单个字符
        KeyDown 和KeyUp 可以捕获组合键。
    3）.KeyPress 可以捕获单个字符的大小写
    4）.KeyDown和KeyUp 对于单个字符捕获的KeyValue 都是一个值，也就是不能判断单个字符的大小写。
    5）.KeyPress 不区分小键盘和主键盘的数字字符。
        KeyDown 和KeyUp 区分小键盘和主键盘的数字字符。
    6）.其中PrScrn 按键KeyPress、KeyDown和KeyUp 都不能捕获。


KeyPress事件：
private void Form1_KeyPress(object sender, KeyPressEventArgs e)
{
    if(e.KeyChar== '1')
    {
        button1.PerformClick();// 执行按钮“1”的操作
        e.Handled = true;
    }
}
KeyChar取值：

 另外2个特殊ASCII码：回车=13，换行=10KeyDown事件：private void Form1_KeyDown(object sender, KeyEventArgs e) {        Keys key = e.KeyCode;        if (e.Control!=true)//如果没按Ctrl键return;        switch (key)        {             case Keys.NumPad0:                 //按下小键盘0以后                break;             case Keys.NumPad1:                 //按下小键盘1以后                break;             case Keys.S:                 //按下S键以后                break;             case Keys.Up:                 //按下向下键以后                break;        } }KeyCode取值（Java中应该也是一样的值）：keycode    8 = BackSpace BackSpace keycode    9 = Tab Tab keycode   12 = Clear keycode   13 = Enter keycode   16 = Shift_L keycode   17 = Control_L keycode   18 = Alt_L keycode   19 = Pause keycode   20 = Caps_Lock keycode   27 = Escape Escape keycode   32 = space space keycode   33 = Prior keycode   34 = Next keycode   35 = End keycode   36 = Home keycode   37 = Left keycode   38 = Up keycode   39 = Right keycode   40 = Down keycode   41 = Select keycode   42 = Print keycode   43 = Execute keycode   45 = Insert keycode   46 = Delete keycode   47 = Help keycode   48 = 0 equal braceright keycode   49 = 1 exclam onesuperior keycode   50 = 2 quotedbl twosuperior keycode   51 = 3 section threesuperior keycode   52 = 4 dollar keycode   53 = 5 percent keycode   54 = 6 ampersand keycode   55 = 7 slash braceleft keycode   56 = 8 parenleft bracketleft keycode   57 = 9 parenright bracketright keycode   65 = a A keycode   66 = b B keycode   67 = c C keycode   68 = d D keycode   69 = e E EuroSign keycode   70 = f F keycode   71 = g G keycode   72 = h H keycode   73 = i I keycode   74 = j J keycode   75 = k K keycode   76 = l L keycode   77 = m M mu keycode   78 = n N keycode   79 = o O keycode   80 = p P keycode   81 = q Q at keycode   82 = r R keycode   83 = s S keycode   84 = t T keycode   85 = u U keycode   86 = v V keycode   87 = w W keycode   88 = x X keycode   89 = y Y keycode   90 = z Z keycode   96 = KP_0 KP_0 keycode   97 = KP_1 KP_1 keycode   98 = KP_2 KP_2 keycode   99 = KP_3 KP_3 keycode 100 = KP_4 KP_4 keycode 101 = KP_5 KP_5 keycode 102 = KP_6 KP_6 keycode 103 = KP_7 KP_7 keycode 104 = KP_8 KP_8 keycode 105 = KP_9 KP_9 keycode 106 = KP_Multiply KP_Multiply keycode 107 = KP_Add KP_Add keycode 108 = KP_Separator KP_Separator keycode 109 = KP_Subtract KP_Subtract keycode 110 = KP_Decimal KP_Decimal keycode 111 = KP_Divide KP_Divide keycode 112 = F1 keycode 113 = F2 keycode 114 = F3 keycode 115 = F4 keycode 116 = F5 keycode 117 = F6 keycode 118 = F7 keycode 119 = F8 keycode 120 = F9 keycode 121 = F10 keycode 122 = F11 keycode 123 = F12 keycode 124 = F13 keycode 125 = F14 keycode 126 = F15 keycode 127 = F16 keycode 128 = F17 keycode 129 = F18 keycode 130 = F19 keycode 131 = F20 keycode 132 = F21 keycode 133 = F22 keycode 134 = F23 keycode 135 = F24 keycode 136 = Num_Lock keycode 137 = Scroll_Lock keycode 187 = acute grave keycode 188 = comma semicolon keycode 189 = minus underscore keycode 190 = period colon keycode 192 = numbersign apostrophe keycode 210 = plusminus hyphen macron keycode 211 = keycode 212 = copyright registered keycode 213 = guillemotleft guillemotright keycode 214 = masculine ordfeminine keycode 215 = ae AE keycode 216 = cent yen keycode 217 = questiondown exclamdown keycode 218 = onequarter onehalf threequarters keycode 220 = less greater bar keycode 221 = plus asterisk asciitilde keycode 227 = multiply division keycode 228 = acircumflex Acircumflex keycode 229 = ecircumflex Ecircumflex keycode 230 = icircumflex Icircumflex keycode 231 = ocircumflex Ocircumflex keycode 232 = ucircumflex Ucircumflex keycode 233 = ntilde Ntilde keycode 234 = yacute Yacute keycode 235 = oslash Ooblique keycode 236 = aring Aring keycode 237 = ccedilla Ccedilla keycode 238 = thorn THORN keycode 239 = eth ETH keycode 240 = diaeresis cedilla currency keycode 241 = agrave Agrave atilde Atilde keycode 242 = egrave Egrave keycode 243 = igrave Igrave keycode 244 = ograve Ograve otilde Otilde keycode 245 = ugrave Ugrave keycode 246 = adiaeresis Adiaeresis keycode 247 = ediaeresis Ediaeresis keycode 248 = idiaeresis Idiaeresis keycode 249 = odiaeresis Odiaeresis keycode 250 = udiaeresis Udiaeresis keycode 251 = ssharp question backslash keycode 252 = asciicircum degree keycode 253 = 3 sterling keycode 254 = Mode_switch3. 如何获取键盘按钮的keyChar值（keyCode同理）：private void Form1_KeyPress(object sender, KeyPressEventArgs e)  {      char Key_Char = e.KeyChar;//判斷按鍵的 Keychar      MessageBox.Show(((int)(Key_Char)).ToString());//轉成整數顯示  }参考 http://hi.baidu.com/caixiexin/item/0baac4cab5da91d497445221 http://blog.csdn.NET/kingisking1/article/details/6091289 http://www.dotblogs.com.tw/chiajung/archive/2009/11/04/11416.aspx