Question

我已经启动了一个进程，并希望向其发布一个类似PageDown键的消息。

以下是运行该流程的代码。

Process.Start("chrome.exe", "D:/sample.htm");
foreach (System.Diagnostics.Process p in System.Diagnostics.Process.GetProcesses())
{
    if (p.ProcessName == "chrome" && p.MainWindowTitle == "sample.htm - Google Chrome")
    {
       //how to Send a pagedown key to process p
    }
}

我创建了以下课程，但我不知道它为什么不起作用？

class KeyHandle
{
    private static Int32 WM_KEYDOWN = 0x100;
    private static Int32 WM_KEYUP = 0x101;

    [return: MarshalAs(UnmanagedType.Bool)]
    [DllImport("user32.dll", SetLastError = true)]
    static extern bool PostMessage(IntPtr hWnd, int Msg, System.Windows.Forms.Keys wParam, int lParam);

    public static void SendKey(IntPtr hWnd, System.Windows.Forms.Keys key)
    {
        PostMessage(hWnd, WM_KEYUP, key, 0);
    }


}

并以这种方式称呼

foreach (System.Diagnostics.Process p in System.Diagnostics.Process.GetProcesses())
{
    if (p.ProcessName == "chrome" && p.MainWindowTitle == "sample.htm - Google Chrome")
    {
         KeyHandle.SendKey(p.MainWindowHandle, Keys.PageDown);
    }
}

Answer 1

我使用SendKeys API重写您的代码。我测试它运作良好

foreach (System.Diagnostics.Process p in System.Diagnostics.Process.GetProcesses())
{
    if (p.ProcessName == "chrome" && p.MainWindowTitle == "sample.htm - Google Chrome" &&
        p.MainWindowHandle != IntPtr.Zero)
    {
        SetForegroundWindow(p.MainWindowHandle);
        SendKeys.SendWait("{PGDN}");
    }
}

要声明函数SetForegroundWindow，请使用：

[DllImport("user32.dll")]
private static extern bool SetForegroundWindow(IntPtr hWnd);

List of keys

Answer 2

Process.Start（“chrome.exe”，“D：/sample.htm”）; foreach（System.Diagnostics.Process.GetProcesses（）中的System.Diagnostics.Process p） { if（p.ProcessName ==“chrome”＆amp;＆amp; p.MainWindowTitle ==“sample.htm - Google Chrome”） { KeyHandle.SendKey（p.MainWindowHandle，Keys.PageDown）; } } 你也需要这个班级

类KeyHandle { private static Int32 WM_KEYDOWN = 0x100; private static Int32 WM_KEYUP = 0x101;

[return: MarshalAs(UnmanagedType.Bool)]
[DllImport("user32.dll", SetLastError = true)]
static extern bool PostMessage(IntPtr hWnd, int Msg, System.Windows.Forms.Keys wParam, int lParam);

public static void SendKey(IntPtr hWnd, System.Windows.Forms.Keys key)
{
    PostMessage(hWnd, WM_KEYUP, key, 0);
}

}

如何将密钥发送到进程

2 个答案: