C#模拟键盘按键的三种方式实现

1.System.Windows.Forms.SendKeys

组合键：Ctrl = ^ 、Shift = + 、Alt = % 
模拟按键：A

private void button1_Click(object sender,EventArgs e) { textBox1.Focus(); SendKeys.Send("{A}"); }

模拟组合键：CTRL + A

private void button1_Click(object sender,EventArgs e) { webbrowser1.Focus(); SendKeys.Send("^{A}"); }

 

SendKeys.Send // 异步模拟按键(不阻塞UI)

SendKeys.SendWait // 同步模拟按键(会阻塞UI直到对方处理完消息后返回)

//这种方式适用于WinForm程序，在Console程序以及WPF程序中不适用

2.keybd_event

DLL引用

[DllImport("user32.dll",EntryPoint = "keybd_event",SetLastError = true)] public static extern void keybd_event(Keys bVk,byte bScan,uint dwFlags,uint dwExtraInfo);

 

模拟按键：A

private void button1_Click(object sender,EventArgs e) { textBox1.Focus(); keybd_event(Keys.A,0,0); }

模拟组合键：CTRL + A

public const int KEYEVENTF_KEYUP = 2; private void button1_Click(object sender,EventArgs e) { webbrowser1.Focus(); keybd_event(Keys.ControlKey,0); keybd_event(Keys.A,0); keybd_event(Keys.ControlKey,KEYEVENTF_KEYUP,0); }

3.PostMessage

上面两种方式都是全局范围呢，现在介绍如何对单个窗口进行模拟按键

模拟按键：A / 两次

[DllImport("user32.dll",EntryPoint = "PostMessageA",SetLastError = true)] public static extern int PostMessage(IntPtr hWnd,int Msg,Keys wParam,int lParam); public const int WM_CHAR = 256; private void button1_Click(object sender,EventArgs e) { textBox1.Focus(); PostMessage(textBox1.Handle,256,Keys.A,2); }

 

模拟组合键：CTRL + A

1如下方式可能会失效，所以最好采用上述两种方式

public const int WM_KEYDOWN = 256; public const int WM_KEYUP = 257; private void button1_Click(object sender,0); PostMessage(webbrowser1.Handle,WM_KEYDOWN,0); }