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  • 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, 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, 0, 0);
                keybd_event(Keys.A, 0, 0, 0);
                keybd_event(Keys.ControlKey, 0, 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

       如下方式可能会失效,所以最好采用上述两种方式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);
            }

    出处:https://www.cnblogs.com/soundcode/p/9467102.html

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  • 原文地址:https://www.cnblogs.com/mq0036/p/10416766.html
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