C#如何獲取鍵盤(pán)和鼠標(biāo)處于空閑狀態(tài)下的時(shí)間? 可以通過(guò)windows api 函數(shù) GetLastInputInfo或者全局鉤子HOOK來(lái)實(shí)現(xiàn)

用 GetLastInputInfo 寫(xiě)（鍵鼠空閑15分鐘自動(dòng)彈出一個(gè)頁(yè)面）

新建windows 應(yīng)用程序項(xiàng)目

using System;
using System.Collections.Generic;
using System.Windows.Forms;
using System.Runtime.InteropServices;
namespace APPDEMO
{
    static class Program
    {
        private static VedioForm vf = null;
        private static System.Windows.Forms.Timer timer1 = null;
        /// <summary>
        /// 應(yīng)用程序的主入口點(diǎn)。
        /// </summary>
        [STAThread]
        static void Main()
        {
            Application.EnableVisualStyles();
            Application.SetCompatibleTextRenderingDefault(false);
            //啟用定時(shí)器
            if (timer1 == null)
            {
                timer1 = new Timer();
            }
            timer1.Interval = 60 * 1000;
            timer1.Tick += new EventHandler(timer1_Tick);
            timer1.Start();
            Application.Run(new MainForm());
        }
        private static void timer1_Tick(object sender, EventArgs e)
        {
            //判斷空閑時(shí)間是否超過(guò)15分鐘,超過(guò)則自動(dòng)彈出視頻播放窗口
            if (GetIdleTick() / 1000 >= 15 * 60)
            {
                ShowVidioForm();
            }
        }
        /// <summary>
        /// 打開(kāi)視頻播放窗口
        /// </summary>
        private static void ShowVidioForm()
        {
            try
            {
                if (vf == null)
                {
                    vf = new VedioForm();
                }
                vf.ShowDialog();
            }
            catch
            {
            }
        }
        /// <summary>
        /// 獲取鼠標(biāo)鍵盤(pán)空閑時(shí)間
        /// </summary>
        /// <returns></returns>
        public static long GetIdleTick()
        {
            LASTINPUTINFO lastInputInfo = new LASTINPUTINFO();
            lastInputInfo.cbSize = Marshal.SizeOf(lastInputInfo);
            if (!GetLastInputInfo(ref lastInputInfo)) return 0;
            return Environment.TickCount - (long)lastInputInfo.dwTime;
        }
        [StructLayout(LayoutKind.Sequential)]
        private struct LASTINPUTINFO
        {
            [MarshalAs(UnmanagedType.U4)]
            public int cbSize;
            [MarshalAs(UnmanagedType.U4)]
            public uint dwTime;
        }
        /// <summary>
        /// 調(diào)用windows API獲取鼠標(biāo)鍵盤(pán)空閑時(shí)間
        /// </summary>
        /// <param name="plii"></param>
        /// <returns></returns>
        [DllImport("user32.dll")]
        private static extern bool GetLastInputInfo(ref LASTINPUTINFO plii);
    }
}

用HOOK鉤子來(lái)實(shí)現(xiàn) 創(chuàng)建鉤子類

using System;
using System.Collections.Generic;
using System.Linq;
using System.Runtime.InteropServices;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;

namespace TengDa.Core
{
    class KeyboardHook
    {
        public event KeyEventHandler KeyDownEvent;
        public event KeyPressEventHandler KeyPressEvent;
        public event KeyEventHandler KeyUpEvent;

        public delegate int HookProc(int nCode, Int32 wParam, IntPtr lParam);
        static int hKeyboardHook = 0; //聲明鍵盤(pán)鉤子處理的初始值
                                      //值在Microsoft SDK的Winuser.h里查詢
        public const int WH_KEYBOARD_LL = 13;   //線程鍵盤(pán)鉤子監(jiān)聽(tīng)鼠標(biāo)消息設(shè)為2，全局鍵盤(pán)監(jiān)聽(tīng)鼠標(biāo)消息設(shè)為13
        HookProc KeyboardHookProcedure; //聲明KeyboardHookProcedure作為HookProc類型
                                        //鍵盤(pán)結(jié)構(gòu)
        [StructLayout(LayoutKind.Sequential)]
        public class KeyboardHookStruct
        {
            public int vkCode;  //定一個(gè)虛擬鍵碼。該代碼必須有一個(gè)價(jià)值的范圍1至254
            public int scanCode; // 指定的硬件掃描碼的關(guān)鍵
            public int flags;  // 鍵標(biāo)志
            public int time; // 指定的時(shí)間戳記的這個(gè)訊息
            public int dwExtraInfo; // 指定額外信息相關(guān)的信息
        }
        //使用此功能，安裝了一個(gè)鉤子
        [DllImport("user32.dll", CharSet = CharSet.Auto, CallingConvention = CallingConvention.StdCall)]
        public static extern int SetWindowsHookEx(int idHook, HookProc lpfn, IntPtr hInstance, int threadId);


        //調(diào)用此函數(shù)卸載鉤子
        [DllImport("user32.dll", CharSet = CharSet.Auto, CallingConvention = CallingConvention.StdCall)]
        public static extern bool UnhookWindowsHookEx(int idHook);


        //使用此功能，通過(guò)信息鉤子繼續(xù)下一個(gè)鉤子
        [DllImport("user32.dll", CharSet = CharSet.Auto, CallingConvention = CallingConvention.StdCall)]
        public static extern int CallNextHookEx(int idHook, int nCode, Int32 wParam, IntPtr lParam);

        // 取得當(dāng)前線程編號(hào)（線程鉤子需要用到）
        [DllImport("kernel32.dll")]
        static extern int GetCurrentThreadId();

        //使用WINDOWS API函數(shù)代替獲取當(dāng)前實(shí)例的函數(shù),防止鉤子失效
        [DllImport("kernel32.dll")]
        public static extern IntPtr GetModuleHandle(string name);

        public void Start()
        {
            // 安裝鍵盤(pán)鉤子
            if (hKeyboardHook == 0)
            {
                KeyboardHookProcedure = new HookProc(KeyboardHookProc);
                hKeyboardHook = SetWindowsHookEx(WH_KEYBOARD_LL, KeyboardHookProcedure, GetModuleHandle(System.Diagnostics.Process.GetCurrentProcess().MainModule.ModuleName), 0);
                //hKeyboardHook = SetWindowsHookEx(WH_KEYBOARD_LL, KeyboardHookProcedure, Marshal.GetHINSTANCE(Assembly.GetExecutingAssembly().GetModules()[0]), 0);
                //************************************
                //鍵盤(pán)線程鉤子
                SetWindowsHookEx(13, KeyboardHookProcedure, IntPtr.Zero, GetCurrentThreadId());//指定要監(jiān)聽(tīng)的線程idGetCurrentThreadId(),
                                                                                               //鍵盤(pán)全局鉤子,需要引用空間(using System.Reflection;)
                                                                                               //SetWindowsHookEx( 13,MouseHookProcedure,Marshal.GetHINSTANCE(Assembly.GetExecutingAssembly().GetModules()[0]),0);
                                                                                               //
                                                                                               //關(guān)于SetWindowsHookEx (int idHook, HookProc lpfn, IntPtr hInstance, int threadId)函數(shù)將鉤子加入到鉤子鏈表中，說(shuō)明一下四個(gè)參數(shù)：
                                                                                               //idHook 鉤子類型，即確定鉤子監(jiān)聽(tīng)何種消息，上面的代碼中設(shè)為2，即監(jiān)聽(tīng)鍵盤(pán)消息并且是線程鉤子，如果是全局鉤子監(jiān)聽(tīng)鍵盤(pán)消息應(yīng)設(shè)為13，
                                                                                               //線程鉤子監(jiān)聽(tīng)鼠標(biāo)消息設(shè)為7，全局鉤子監(jiān)聽(tīng)鼠標(biāo)消息設(shè)為14。lpfn 鉤子子程的地址指針。如果dwThreadId參數(shù)為0 或是一個(gè)由別的進(jìn)程創(chuàng)建的
                                                                                               //線程的標(biāo)識(shí)，lpfn必須指向DLL中的鉤子子程。 除此以外，lpfn可以指向當(dāng)前進(jìn)程的一段鉤子子程代碼。鉤子函數(shù)的入口地址，當(dāng)鉤子鉤到任何
                                                                                               //消息后便調(diào)用這個(gè)函數(shù)。hInstance應(yīng)用程序?qū)嵗木浔?。?biāo)識(shí)包含lpfn所指的子程的DLL。如果threadId 標(biāo)識(shí)當(dāng)前進(jìn)程創(chuàng)建的一個(gè)線程，而且子
                                                                                               //程代碼位于當(dāng)前進(jìn)程，hInstance必須為NULL?？梢院芎?jiǎn)單的設(shè)定其為本應(yīng)用程序的實(shí)例句柄。threaded 與安裝的鉤子子程相關(guān)聯(lián)的線程的標(biāo)識(shí)符
                                                                                               //如果為0，鉤子子程與所有的線程關(guān)聯(lián)，即為全局鉤子
                                                                                               //************************************
                                                                                               //如果SetWindowsHookEx失敗
                if (hKeyboardHook == 0)
                {
                    Stop();
                    throw new Exception("安裝鍵盤(pán)鉤子失敗");
                }
            }
        }
        public void Stop()
        {
            bool retKeyboard = true;


            if (hKeyboardHook != 0)
            {
                retKeyboard = UnhookWindowsHookEx(hKeyboardHook);
                hKeyboardHook = 0;
            }

            if (!(retKeyboard)) throw new Exception("卸載鉤子失?。?);
        }
        //ToAscii職能的轉(zhuǎn)換指定的虛擬鍵碼和鍵盤(pán)狀態(tài)的相應(yīng)字符或字符
        [DllImport("user32")]
        public static extern int ToAscii(int uVirtKey, //[in] 指定虛擬關(guān)鍵代碼進(jìn)行翻譯。
                                         int uScanCode, // [in] 指定的硬件掃描碼的關(guān)鍵須翻譯成英文。高階位的這個(gè)值設(shè)定的關(guān)鍵，如果是（不壓）
                                         byte[] lpbKeyState, // [in] 指針，以256字節(jié)數(shù)組，包含當(dāng)前鍵盤(pán)的狀態(tài)。每個(gè)元素（字節(jié)）的數(shù)組包含狀態(tài)的一個(gè)關(guān)鍵。如果高階位的字節(jié)是一套，關(guān)鍵是下跌（按下）。在低比特，如果設(shè)置表明，關(guān)鍵是對(duì)切換。在此功能，只有肘位的CAPS LOCK鍵是相關(guān)的。在切換狀態(tài)的NUM個(gè)鎖和滾動(dòng)鎖定鍵被忽略。
                                         byte[] lpwTransKey, // [out] 指針的緩沖區(qū)收到翻譯字符或字符。
                                         int fuState); // [in] Specifies whether a menu is active. This parameter must be 1 if a menu is active, or 0 otherwise.

        //獲取按鍵的狀態(tài)
        [DllImport("user32")]
        public static extern int GetKeyboardState(byte[] pbKeyState);


        [DllImport("user32.dll", CharSet = CharSet.Auto, CallingConvention = CallingConvention.StdCall)]
        private static extern short GetKeyState(int vKey);

        private const int WM_KEYDOWN = 0x100;//KEYDOWN
        private const int WM_KEYUP = 0x101;//KEYUP
        private const int WM_SYSKEYDOWN = 0x104;//SYSKEYDOWN
        private const int WM_SYSKEYUP = 0x105;//SYSKEYUP

        private int KeyboardHookProc(int nCode, Int32 wParam, IntPtr lParam)
        {
            // 偵聽(tīng)鍵盤(pán)事件
            if ((nCode >= 0) && (KeyDownEvent != null || KeyUpEvent != null || KeyPressEvent != null))
            {
                KeyboardHookStruct MyKeyboardHookStruct = (KeyboardHookStruct)Marshal.PtrToStructure(lParam, typeof(KeyboardHookStruct));
                // raise KeyDown
                if (KeyDownEvent != null && (wParam == WM_KEYDOWN || wParam == WM_SYSKEYDOWN))
                {
                    Keys keyData = (Keys)MyKeyboardHookStruct.vkCode;
                    KeyEventArgs e = new KeyEventArgs(keyData);
                    KeyDownEvent(this, e);
                }

                //鍵盤(pán)按下
                if (KeyPressEvent != null && wParam == WM_KEYDOWN)
                {
                    byte[] keyState = new byte[256];
                    GetKeyboardState(keyState);

                    byte[] inBuffer = new byte[2];
                    if (ToAscii(MyKeyboardHookStruct.vkCode, MyKeyboardHookStruct.scanCode, keyState, inBuffer, MyKeyboardHookStruct.flags) == 1)
                    {
                        KeyPressEventArgs e = new KeyPressEventArgs((char)inBuffer[0]);
                        KeyPressEvent(this, e);
                    }
                }

                // 鍵盤(pán)抬起
                if (KeyUpEvent != null && (wParam == WM_KEYUP || wParam == WM_SYSKEYUP))
                {
                    Keys keyData = (Keys)MyKeyboardHookStruct.vkCode;
                    KeyEventArgs e = new KeyEventArgs(keyData);
                    KeyUpEvent(this, e);
                }

            }
            //如果返回1，則結(jié)束消息，這個(gè)消息到此為止，不再傳遞。
            //如果返回0或調(diào)用CallNextHookEx函數(shù)則消息出了這個(gè)鉤子繼續(xù)往下傳遞，也就是傳給消息真正的接受者
            return CallNextHookEx(hKeyboardHook, nCode, wParam, lParam);
        }
        ~KeyboardHook()
        {
            Stop();
        }
   }
}

調(diào)用 方法文章來(lái)源地址http://www.zghlxwxcb.cn/news/detail-506940.html

 private void hook_KeyDown(object sender, KeyEventArgs e)
        {
            //  這里寫(xiě)具體實(shí)現(xiàn)
            if (e.KeyCode.Equals(Keys.PrintScreen))
            {

            }
        }

        /// <summary>
        /// 開(kāi)始監(jiān)聽(tīng)
        /// </summary>
        public void startListen()
        {
            myKeyEventHandeler = new KeyEventHandler(hook_KeyDown);
            k_hook.KeyDownEvent += myKeyEventHandeler;//鉤住鍵按下
            k_hook.Start();//安裝鍵盤(pán)鉤子
        }

        /// <summary>
        /// 結(jié)束監(jiān)聽(tīng)
        /// </summary>
        public void stopListen()
        {
            if (myKeyEventHandeler != null)
            {
                k_hook.KeyDownEvent -= myKeyEventHandeler;//取消按鍵事件
                myKeyEventHandeler = null;
                k_hook.Stop();//關(guān)閉鍵盤(pán)鉤子
            }
        }

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