获取当前方法事件对应的控件

例如,button1对应的事件button1_Click():

private void button1_Click(object sender, EventArgs e)
{

}
我们想在方法内部获得事件方法对应的控件相关参数:名称、内容、数据…

可以通过事件中传递过来的sender对象获取名称

因为我们的控件是button类。所以用—>(Button) sender,

同理,其他类型的控件就是就是—>(控件类) sender

((ComboBox) sender).Name//名称
((ComboBox) sender).Text//获取文本

监听按键-创建类来使用

c#按键键盘事件监控键盘上下左右和其它按键

重写:protected override bool ProcessDialogKey(Keys keyData)就可以实现了。

放在窗口类里面

public partial class Form_XYZ_Jog : Form

{

xxxxx

}

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protected override bool ProcessDialogKey(Keys keyData)
{
// MessageBox.Show(keyData.ToString());
string direction2 = keyData.ToString();
string Left = "A";
string Right = "D";
string Front = "W";
string Back = "S";
string Up = "Up";
string Down = "Down";
label_press_msg.Text = "已按下:" + direction2;
Console.WriteLine(DateTime.Now.ToString()+ label_press_msg.Text);

if (direction2 ==Left)
{
button_move_left.Focus();

EnableLeftRightFrontBack(true);
EnableUpDown(false);
}
else if(direction2 == Right)
{
button_move_right.Focus();
EnableLeftRightFrontBack(true);
EnableUpDown(false);
}
else if (direction2 == Front)
{
button_move_front.Focus();
EnableLeftRightFrontBack(true);
EnableUpDown(false);
}
else if (direction2 == Back)
{
button_move_back.Focus();
EnableLeftRightFrontBack(true);
EnableUpDown(false);
}
else if (direction2 == Up)
{
button_move_down.Focus();
EnableLeftRightFrontBack(false);
EnableUpDown(true);
}
else if (direction2 == Down)
{
button_move_up.Focus();
EnableLeftRightFrontBack(false);
EnableUpDown(true);
}
return base.ProcessDialogKey(keyData);
}

全局监听

C#如何获取键盘和鼠标处于空闲状态下的时间 可以通过windows api 函数 GetLastInputInfo或者全局钩子HOOK来实现

用 GetLastInputInfo 写(键鼠空闲15分钟自动弹出一个页面)

新建windows 应用程序项目

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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>
/// 应用程序的主入口点。
/// </summary>
[STAThread]
static void Main()
{
Application.EnableVisualStyles();
Application.SetCompatibleTextRenderingDefault(false);
//启用定时器
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)
{
//判断空闲时间是否超过15分钟,超过则自动弹出视频播放窗口
if (GetIdleTick() / 1000 >= 15 * 60)
{
ShowVidioForm();
}
}
/// <summary>
/// 打开视频播放窗口
/// </summary>
private static void ShowVidioForm()
{
try
{
if (vf == null)
{
vf = new VedioForm();
}
vf.ShowDialog();
}
catch
{
}
}
/// <summary>
/// 获取鼠标键盘空闲时间
/// </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>
/// 调用windows API获取鼠标键盘空闲时间
/// </summary>
/// <param name="plii"></param>
/// <returns></returns>
[DllImport("user32.dll")]
private static extern bool GetLastInputInfo(ref LASTINPUTINFO plii);
}
}

用HOOK钩子来实现 创建钩子类

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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; //声明键盘钩子处理的初始值
//值在Microsoft SDK的Winuser.h里查询
public const int WH_KEYBOARD_LL = 13; //线程键盘钩子监听鼠标消息设为2,全局键盘监听鼠标消息设为13
HookProc KeyboardHookProcedure; //声明KeyboardHookProcedure作为HookProc类型
//键盘结构
[StructLayout(LayoutKind.Sequential)]
public class KeyboardHookStruct
{
public int vkCode; //定一个虚拟键码。该代码必须有一个价值的范围1至254
public int scanCode; // 指定的硬件扫描码的关键
public int flags; // 键标志
public int time; // 指定的时间戳记的这个讯息
public int dwExtraInfo; // 指定额外信息相关的信息
}
//使用此功能,安装了一个钩子
[DllImport("user32.dll", CharSet = CharSet.Auto, CallingConvention = CallingConvention.StdCall)]
public static extern int SetWindowsHookEx(int idHook, HookProc lpfn, IntPtr hInstance, int threadId);


//调用此函数卸载钩子
[DllImport("user32.dll", CharSet = CharSet.Auto, CallingConvention = CallingConvention.StdCall)]
public static extern bool UnhookWindowsHookEx(int idHook);


//使用此功能,通过信息钩子继续下一个钩子
[DllImport("user32.dll", CharSet = CharSet.Auto, CallingConvention = CallingConvention.StdCall)]
public static extern int CallNextHookEx(int idHook, int nCode, Int32 wParam, IntPtr lParam);

// 取得当前线程编号(线程钩子需要用到)
[DllImport("kernel32.dll")]
static extern int GetCurrentThreadId();

//使用WINDOWS API函数代替获取当前实例的函数,防止钩子失效
[DllImport("kernel32.dll")]
public static extern IntPtr GetModuleHandle(string name);

public void Start()
{
// 安装键盘钩子
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);
//************************************
//键盘线程钩子
SetWindowsHookEx(13, KeyboardHookProcedure, IntPtr.Zero, GetCurrentThreadId());//指定要监听的线程idGetCurrentThreadId(),
//键盘全局钩子,需要引用空间(using System.Reflection;)
//SetWindowsHookEx( 13,MouseHookProcedure,Marshal.GetHINSTANCE(Assembly.GetExecutingAssembly().GetModules()[0]),0);
//
//关于SetWindowsHookEx (int idHook, HookProc lpfn, IntPtr hInstance, int threadId)函数将钩子加入到钩子链表中,说明一下四个参数:
//idHook 钩子类型,即确定钩子监听何种消息,上面的代码中设为2,即监听键盘消息并且是线程钩子,如果是全局钩子监听键盘消息应设为13,
//线程钩子监听鼠标消息设为7,全局钩子监听鼠标消息设为14。lpfn 钩子子程的地址指针。如果dwThreadId参数为0 或是一个由别的进程创建的
//线程的标识,lpfn必须指向DLL中的钩子子程。 除此以外,lpfn可以指向当前进程的一段钩子子程代码。钩子函数的入口地址,当钩子钩到任何
//消息后便调用这个函数。hInstance应用程序实例的句柄。标识包含lpfn所指的子程的DLL。如果threadId 标识当前进程创建的一个线程,而且子
//程代码位于当前进程,hInstance必须为NULL。可以很简单的设定其为本应用程序的实例句柄。threaded 与安装的钩子子程相关联的线程的标识符
//如果为0,钩子子程与所有的线程关联,即为全局钩子
//************************************
//如果SetWindowsHookEx失败
if (hKeyboardHook == 0)
{
Stop();
throw new Exception("安装键盘钩子失败");
}
}
}
public void Stop()
{
bool retKeyboard = true;


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

if (!(retKeyboard)) throw new Exception("卸载钩子失败!");
}
//ToAscii职能的转换指定的虚拟键码和键盘状态的相应字符或字符
[DllImport("user32")]
public static extern int ToAscii(int uVirtKey, //[in] 指定虚拟关键代码进行翻译。
int uScanCode, // [in] 指定的硬件扫描码的关键须翻译成英文。高阶位的这个值设定的关键,如果是(不压)
byte[] lpbKeyState, // [in] 指针,以256字节数组,包含当前键盘的状态。每个元素(字节)的数组包含状态的一个关键。如果高阶位的字节是一套,关键是下跌(按下)。在低比特,如果设置表明,关键是对切换。在此功能,只有肘位的CAPS LOCK键是相关的。在切换状态的NUM个锁和滚动锁定键被忽略。
byte[] lpwTransKey, // [out] 指针的缓冲区收到翻译字符或字符。
int fuState); // [in] Specifies whether a menu is active. This parameter must be 1 if a menu is active, or 0 otherwise.

//获取按键的状态
[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)
{
// 侦听键盘事件
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);
}

//键盘按下
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);
}
}

// 键盘抬起
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,则结束消息,这个消息到此为止,不再传递。
//如果返回0或调用CallNextHookEx函数则消息出了这个钩子继续往下传递,也就是传给消息真正的接受者
return CallNextHookEx(hKeyboardHook, nCode, wParam, lParam);
}
~KeyboardHook()
{
Stop();
}
}
}

调用 方法

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private void hook_KeyDown(object sender, KeyEventArgs e)
{
// 这里写具体实现
if (e.KeyCode.Equals(Keys.PrintScreen))
{

}
}

/// <summary>
/// 开始监听
/// </summary>
public void startListen()
{
myKeyEventHandeler = new KeyEventHandler(hook_KeyDown);
k_hook.KeyDownEvent += myKeyEventHandeler;//钩住键按下
k_hook.Start();//安装键盘钩子
}

/// <summary>
/// 结束监听
/// </summary>
public void stopListen()
{
if (myKeyEventHandeler != null)
{
k_hook.KeyDownEvent -= myKeyEventHandeler;//取消按键事件
myKeyEventHandeler = null;
k_hook.Stop();//关闭键盘钩子
}
}

相关链接(侵删)

  1. c# 获取当前方法事件对应的控件
  2. c#按键键盘事件监控上下左右和其它按键
  3. C#全局监听键盘事件

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