WPF 发送键盘消息 三种解决方案

如下适合一般的键盘发送消息，不适合DX消息机制。

第一种----------------------------

using System.Windows.Forms;


System.Windows.Forms.SendKeys.SendWait("{Left}");//原来写法
SendKeys.SendWait("{Left}");

第二种-----------------------------

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Windows;
using System.Windows.Input;
using System.Runtime.InteropServices;
using System.Security;
using System.Security.Permissions;
using System.ComponentModel;

namespace KinectController
{
    class KeyboardToolkit
    {
        internal static class NativeMethods
        {
            #region User32
            // Various Win32 constants
            internal const int KeyeventfKeyup = 0x0002;
            internal const int KeyeventfScancode = 0x0008;
            internal const int InputKeyboard = 1;

            // Various Win32 data structures
            [StructLayout(LayoutKind.Sequential)]
            internal struct INPUT
            {
                internal int type;
                internal INPUTUNION union;
            };

            [StructLayout(LayoutKind.Explicit)]
            internal struct INPUTUNION
            {
                [FieldOffset(0)]
                internal MOUSEINPUT mouseInput;
                [FieldOffset(0)]
                internal KEYBDINPUT keyboardInput;
            };

            [StructLayout(LayoutKind.Sequential)]
            internal struct MOUSEINPUT
            {
                internal int dx;
                internal int dy;
                internal int mouseData;
                internal int dwFlags;
                internal int time;
                internal IntPtr dwExtraInfo;
            };

            [StructLayout(LayoutKind.Sequential)]
            internal struct KEYBDINPUT
            {
                internal short wVk;
                internal short wScan;
                internal int dwFlags;
                internal int time;
                internal IntPtr dwExtraInfo;
            };

            // Importing various Win32 APIs that we need for input
            [DllImport("user32.dll", ExactSpelling = true, CharSet = CharSet.Auto)]
            internal static extern int GetSystemMetrics(int nIndex);

            [DllImport("user32.dll", CharSet = CharSet.Auto)]
            internal static extern int MapVirtualKey(int nVirtKey, int nMapType);

            [DllImport("user32.dll", SetLastError = true)]
            internal static extern int SendInput(int nInputs, ref INPUT mi, int cbSize);

            [DllImport("user32.dll", CharSet = CharSet.Auto)]
            internal static extern short VkKeyScan(char ch);

            #endregion User32
        }

        public static class Keyboard
        {
            /// <summary>
            /// Presses down a key.
            /// </summary>
            /// <param name="key">The key to press.</param>
            public static void Press(Key key)
            {
                SendKeyboardInput(key, true);
            }

            /// <summary>
            /// Releases a key.
            /// </summary>
            /// <param name="key">The key to release.</param>
            public static void Release(Key key)
            {
                SendKeyboardInput(key, false);
            }

            /// <summary>
            /// Resets the system keyboard to a clean state.
            /// </summary>
            public static void Reset()
            {
                foreach (Key key in Enum.GetValues(typeof(Key)))
                {
                    if (key != Key.None && (System.Windows.Input.Keyboard.GetKeyStates(key) & KeyStates.Down) > 0)
                    {
                        Release(key);
                    }
                }
            }

            /// <summary>
            /// Performs a press-and-release operation for the specified key, which is effectively equivallent to typing.
            /// </summary>
            /// <param name="key">The key to press.</param>
            public static void Type(Key key)
            {
                Press(key);
                //System.Threading.Thread.Sleep(100);
                Release(key);
            }



            [PermissionSet(SecurityAction.Assert, Name = "FullTrust")]
            private static void SendKeyboardInput(Key key, bool press)
            {
                PermissionSet permissions = new PermissionSet(PermissionState.Unrestricted);
                permissions.Demand();

                NativeMethods.INPUT ki = new NativeMethods.INPUT();
                ki.type = NativeMethods.InputKeyboard;
                ki.union.keyboardInput.wVk = (short)KeyInterop.VirtualKeyFromKey(key);
                ki.union.keyboardInput.wScan = (short)NativeMethods.MapVirtualKey(ki.union.keyboardInput.wVk, 0);

                int dwFlags = 0;

                if (ki.union.keyboardInput.wScan > 0)
                {
                    dwFlags |= NativeMethods.KeyeventfScancode;
                }

                if (!press)
                {
                    dwFlags |= NativeMethods.KeyeventfKeyup;
                }

                ki.union.keyboardInput.dwFlags = dwFlags;

                ki.union.keyboardInput.time = 0;
                ki.union.keyboardInput.dwExtraInfo = new IntPtr(0);

                if (NativeMethods.SendInput(1, ref ki, Marshal.SizeOf(ki)) == 0)
                {
                    throw new Win32Exception(Marshal.GetLastWin32Error());
                }
            }

        }
    }
}

KeyboardToolkit.Keyboard.Type(Key.Right);//按下右键

第三种-------------------------------

using System;
using System.Runtime.InteropServices;
using System.Windows.Forms;

namespace KinectController
{
    public class WinIo
    {
        private const int KBC_KEY_CMD = 0x64;
        private const int KBC_KEY_DATA = 0x60;
        [DllImport("winio32.dll")]
        private static extern bool InitializeWinIo();
        [DllImport("winio32.dll")]
        private static extern bool GetPortVal(IntPtr wPortAddr, out int pdwPortVal, byte bSize);
        [DllImport("winio32.dll")]
        private static extern bool SetPortVal(uint wPortAddr, IntPtr dwPortVal, byte bSize);
        [DllImport("winio32.dll")]
        private static extern byte MapPhysToLin(byte pbPhysAddr, uint dwPhysSize, IntPtr PhysicalMemoryHandle);
        [DllImport("winio32.dll")]
        private static extern bool UnmapPhysicalMemory(IntPtr PhysicalMemoryHandle, byte pbLinAddr);
        [DllImport("winio32.dll")]
        private static extern bool GetPhysLong(IntPtr pbPhysAddr, byte pdwPhysVal);
        [DllImport("winio32.dll")]
        private static extern bool SetPhysLong(IntPtr pbPhysAddr, byte dwPhysVal);
        [DllImport("winio32.dll")]
        private static extern void ShutdownWinIo();
        [DllImport("user32.dll")]
        private static extern int MapVirtualKey(uint Ucode, uint uMapType);


        private WinIo()
        {
            IsInitialize = true;
        }
        public static void Initialize()
        {
            ShutdownWinIo();
            if (InitializeWinIo())
            {
                KBCWait4IBE();
                IsInitialize = true;
            }
            else
            {
                //MessageBox.Show("键盘驱动加载失败！");
            }
        }
        public static void Shutdown()
        {
            if (IsInitialize)
                ShutdownWinIo();
            IsInitialize = false;
        }

        private static bool IsInitialize { get; set; }

        ///等待键盘缓冲区为空
        private static void KBCWait4IBE()
        {
            int dwVal = 0;
            do
            {
                bool flag = GetPortVal((IntPtr)0x64, out dwVal, 1);
            }
            while ((dwVal & 0x2) > 0);
        }
        /// 模拟键盘标按下
        public static void KeyDown(Keys vKeyCoad)
        {
            if (!IsInitialize) return;

            int btScancode = 0;
            btScancode = MapVirtualKey((uint)vKeyCoad, 0);
            KBCWait4IBE();
            SetPortVal(KBC_KEY_CMD, (IntPtr)0xD2, 1);
            KBCWait4IBE();
            SetPortVal(KBC_KEY_DATA, (IntPtr)0x60, 1);
            KBCWait4IBE();
            SetPortVal(KBC_KEY_CMD, (IntPtr)0xD2, 1);
            KBCWait4IBE();
            SetPortVal(KBC_KEY_DATA, (IntPtr)btScancode, 1);
        }
        /// 模拟键盘弹出
        public static void KeyUp(Keys vKeyCoad)
        {
            if (!IsInitialize) return;

            int btScancode = 0;
            btScancode = MapVirtualKey((uint)vKeyCoad, 0);
            KBCWait4IBE();
            SetPortVal(KBC_KEY_CMD, (IntPtr)0xD2, 1);
            KBCWait4IBE();
            SetPortVal(KBC_KEY_DATA, (IntPtr)0x60, 1);
            KBCWait4IBE();
            SetPortVal(KBC_KEY_CMD, (IntPtr)0xD2, 1);
            KBCWait4IBE();
            SetPortVal(KBC_KEY_DATA, (IntPtr)(btScancode | 0x80), 1);
        }
    }
}

private WinIo winIo;                

WinIo.KeyDown(Keys.A);
WinIo.KeyUp(Keys.A); // 松开A
WinIo.Shutdown(); // 用完后注销