使用sendkey函数将键盘密钥发送到C#中的浏览器

Question

您好我正在尝试使用下面的代码向浏览器发送密钥,新的Chrome窗口为我打开,但它不会将密钥发送到浏览器.

当我调试我发现铬过程没有任何标题名称我怎么能解决这个问题？

 Process.Start("chrome.exe", "https://labs.sketchfab.com/sculptfab/");
        System.Threading.Thread.Sleep(2000);
        foreach (System.Diagnostics.Process p in System.Diagnostics.Process.GetProcesses())
        {
            if (p.ProcessName == "chrome" && p.MainWindowTitle == "SculptFab - SculptGL + Sketchfab" &&
                p.MainWindowHandle != IntPtr.Zero)
            {
                System.Threading.Thread.Sleep(2000);
                for (int i = 0; i < 50; i++)
                {
                    KeyHandle.SetForeGround(p.MainWindowHandle);
                    SendKeys.Send("s");
                    System.Threading.Thread.Sleep(2000);
                }

            }
        }

在上面提到的页面中,当键盘上按下"S"时,它会缩小我想要的对象,使用我的C#代码实现这一点

Answer 1

您可以创建一个Process使用它的新实例来发送您的击键.有关详细信息,请参阅/sf/answers/902462151/.

更新

我做了一些研究,看来Chrome确实没有对该SendKeys.Send方法做出反应.但是,您可以使用Windows API调用该SendMessage函数并将Keydown/-up信号发送到窗口.这是一个在Chrome中使用的简单包装:

public class ChromeWrapper
{
    // you might as well use those methods from your helper class
    [DllImport("User32.dll")]
    private static extern int SetForegroundWindow(IntPtr point);
    [DllImport("user32.dll")]
    private static extern IntPtr SendMessage(IntPtr hWnd, uint Msg, IntPtr wParam, IntPtr lParam);
    // the keystroke signals. you can look them up at the msdn pages
    private static uint WM_KEYDOWN = 0x100, WM_KEYUP = 0x101;

    // the reference to the chrome process
    private Process chromeProcess;

    public ChromeWrapper(string url)
    {
        // i'm using the process class as it gives you the MainWindowHandle by default
        chromeProcess = new Process();
        chromeProcess.StartInfo = new ProcessStartInfo("chrome.exe", url);
        chromeProcess.Start();
    }

    public void SendKey(char key)
    {
        if (chromeProcess.MainWindowHandle != IntPtr.Zero)
        {
            // send the keydown signal
            SendMessage(chromeProcess.MainWindowHandle, ChromeWrapper.WM_KEYDOWN, (IntPtr)key, IntPtr.Zero);

            // give the process some time to "realize" the keystroke
            System.Threading.Thread.Sleep(100); 

            // send the keyup signal
            SendMessage(chromeProcess.MainWindowHandle, ChromeWrapper.WM_KEYUP, (IntPtr)key, IntPtr.Zero);
        }
    }
}

使用这个类非常简单:

ChromeWrapper chrome = new ChromeWrapper("https://labs.sketchfab.com/sculptfab/");
System.Threading.Thread.Sleep(5000);

chrome.SendKey('S');

适用于我的机器™(Windows 8.1 Pro N,谷歌浏览器42).

附加信息

此解决方案仅在尚未运行Chrome的情况下才有效,因为Chrome仅将新网址发送到其主要流程,然后打开它.因此,要么事先关闭其他Chrome实例,要么SendMessage在您使用的过程中使用该方法Process.GetProcesses