C#實現的三種方式實現模擬鍵盤按鍵

模擬按鍵在.Net中有三種方式實現。

第一種方式：System.Windows.Forms.SendKeys 

                     組合鍵：Ctrl = ^ 、Shift = + 、Alt = %

模擬按鍵：A

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

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

SendKeys.SendWait // 同步模擬按鍵(會阻塞UI直到對方處理完消息后返回)

第二種方式：keybd_event

模擬按鍵：A

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


    private void button1_Click(object sender, EventArgs e)
    {
        textBox1.Focus();
        keybd_event(Keys.A, 0, 0, 0);
    }</pre> 模擬組合鍵：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);
    }</pre> 上面兩種方式都是全局范圍呢，現在介紹如何對單個窗口進行模擬按鍵 

 
 

 模擬按鍵：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);
    }</pre> 

 
 

 模擬組合鍵：CTRL + A 

        如下方式可能會失效，所以最好采用上述兩種方式 

 
 

        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);
    }</pre> 

 
 
轉自：http://blog.csdn.net/u012395622/article/details/46414213