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=10

KeyDown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 c
4000
edilla 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_switch

3. 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 href="http://lib.csdn.net/base/dotnet" target=_blank>.NET/kingisking1/article/details/6091289
http://www.dotblogs.com.tw/chiajung/archive/2009/11/04/11416.aspx