如果我知道某个键已经pssed $ P $(如 Key.D3
),并在切换键也,我怎么能找出字符引用(例如,#美国键盘,英国键盘英镑符号等)上?
If I know that a certain key has been pressed (eg Key.D3
), and that the Shift key is also down (Keyboard.IsKeyDown(Key.LeftShift) || Keyboard.IsKeyDown(Key.RightShift)
), how can I find out what character that refers to (eg, # on US keyboard, UK pound sign on UK keyboard, etc)?
换句话说,我怎么能找到,编程,即移 + 3 生成#(它不会在非 - 美国键盘)。
Put another way, how can I find out, programatically, that Shift + 3 produces # (it wouldn't on a non-US keyboard).
如果你想确定是什么人物,你会得到一个给定的密钥给改性剂,你应该使用的 USER32 toascii将
功能。或者 ToAsciiEx
如果你想使用的键盘布局的等的那么当前的。
If you want to determine what character you will get from a given key with given modifiers, you should use the user32 ToAscii
function. Or ToAsciiEx
if you want to use a keyboard layout other then the current one.
using System.Runtime.InteropServices;
public static class User32Interop
{
public static char ToAscii(Keys key, Keys modifiers)
{
var outputBuilder = new StringBuilder(2);
int result = ToAscii((uint)key, 0, GetKeyState(modifiers),
outputBuilder, 0);
if (result == 1)
return outputBuilder[0];
else
throw new Exception("Invalid key");
}
private const byte HighBit = 0x80;
private static byte[] GetKeyState(Keys modifiers)
{
var keyState = new byte[256];
foreach (Keys key in Enum.GetValues(typeof(Keys)))
{
if ((modifiers & key) == key)
{
keyState[(int)key] = HighBit;
}
}
return keyState;
}
[DllImport("user32.dll")]
private static extern int ToAscii(uint uVirtKey, uint uScanCode,
byte[] lpKeyState,
[Out] StringBuilder lpChar,
uint uFlags);
}
您现在可以使用这样的:
You can now use it like this:
char c = User32Interop.ToAscii(Keys.D3, Keys.ShiftKey); // = '#'
如果你需要一个以上的修改,只是或
他们。 Keys.ShiftKey | Keys.AltKey
If you need more than one modifier, just or
them. Keys.ShiftKey | Keys.AltKey