C#實現的三種方式實現類比鍵盤按鍵

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1.System.Windows.Forms.SendKeys

按鍵組合：Ctrl = ^ 、Shift = + 、Alt = % 
類比按鍵：A

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

類比按鍵組合：CTRL + A

        private void button1_Click(object sender, EventArgs e)        {            webBrowser1.Focus();            SendKeys.Send("^{A}");        }

 

SendKeys.Send // 非同步類比按鍵(不阻塞UI)

SendKeys.SendWait // 同步類比按鍵(會阻塞UI直到對方處理完訊息後返回)

//這種方式適用於WinForm程式，在Console程式以及WPF程式中不適用

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);

 

類比按鍵：A

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

類比按鍵組合：CTRL + A

        public const int KEYEVENTF_KEYUP = 2;        private void button1_Click(object sender, EventArgs e)        {            webBrowser1.Focus();            keybd_event(Keys.ControlKey, 0, 0, 0);            keybd_event(Keys.A, 0, 0, 0);            keybd_event(Keys.ControlKey, 0, KEYEVENTF_KEYUP, 0);        }

3.PostMessage

上面兩種方式都是全域範圍呢，現在介紹如何對單個視窗進行類比按鍵

類比按鍵：A / 兩次

        [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);        }

 

類比按鍵組合：CTRL + A

   如下方式可能會失效，所以最好採用上述兩種方式1

        public const int WM_KEYDOWN = 256;        public const int WM_KEYUP = 257;        private void button1_Click(object sender, EventArgs e)        {            webBrowser1.Focus();            keybd_event(Keys.ControlKey, 0, 0, 0);            keybd_event(Keys.A, 0, 0, 0);             PostMessage(webBrowser1.Handle, WM_KEYDOWN, Keys.A, 0);            keybd_event(Keys.ControlKey, 0, KEYEVENTF_KEYUP, 0);        }

C#實現的三種方式實現類比鍵盤按鍵