c# - 将键码转换为字符/字符串

Question

我正在尝试将 System.Windows.Forms.Keys 转换为字符串/字符，使用:

KeysConverter converter = new KeysConverter();
string text = converter.ConvertToString(keyCode);
Console.WriteLine(text);

但它为“.”返回了“OemPeriod”。和“Oemcomma”代表“，”。有没有办法得到准确的字符？

Answer 1

无论如何，您要实现的目标都不是微不足道的任务。 Windows(例如)使用键盘映射(键盘布局)将键盘键转换为实际字符。以下是我是如何实现这一目标的:

    public string KeyCodeToUnicode(Keys key)
    {
        byte[] keyboardState = new byte[255];
        bool keyboardStateStatus = GetKeyboardState(keyboardState);

        if (!keyboardStateStatus)
        {
            return "";
        }

        uint virtualKeyCode = (uint)key;
        uint scanCode = MapVirtualKey(virtualKeyCode, 0);
        IntPtr inputLocaleIdentifier = GetKeyboardLayout(0);

        StringBuilder result = new StringBuilder();
        ToUnicodeEx(virtualKeyCode, scanCode, keyboardState, result, (int)5, (uint)0, inputLocaleIdentifier);

        return result.ToString();
    }

    [DllImport("user32.dll")]
    static extern bool GetKeyboardState(byte[] lpKeyState);

    [DllImport("user32.dll")]
    static extern uint MapVirtualKey(uint uCode, uint uMapType);

    [DllImport("user32.dll")]
    static extern IntPtr GetKeyboardLayout(uint idThread);

    [DllImport("user32.dll")]
    static extern int ToUnicodeEx(uint wVirtKey, uint wScanCode, byte[] lpKeyState, [Out, MarshalAs(UnmanagedType.LPWStr)] StringBuilder pwszBuff, int cchBuff, uint wFlags, IntPtr dwhkl);