c# - SendKey.Send() 不工作

Question

我正在使用 WPF 并且导入了 System.Windows.Form 引用。这是我的代码:

Process[] process = Process.GetProcessesByName("wmplayer");
SetForegroundWindow(process[0].MainWindowHandle);
Thread.Sleep(200);
System.Windows.Forms.SendKeys.Send("^p");

Windows Media Player 聚焦，但未收到击键。为什么？

Answer 1

您可以使用 WinAPI 而不是 SendKeys:

[DllImport("user32.dll", SetLastError = true)]
static extern void keybd_event(byte bVk, byte bScan, uint dwFlags, UIntPtr dwExtraInfo);
public static void PressKey(Keys key, bool up) {
    const int KEYEVENTF_EXTENDEDKEY = 0x1;
    const int KEYEVENTF_KEYUP = 0x2;
    if (up) {
        keybd_event((byte) key, 0x45, KEYEVENTF_EXTENDEDKEY | KEYEVENTF_KEYUP, (UIntPtr) 0);
    }
    else {
        keybd_event((byte) key, 0x45, KEYEVENTF_EXTENDEDKEY, (UIntPtr) 0);
    }
}

void TestProc() {
    PressKey(Keys.ControlKey, false);
    PressKey(Keys.P, false);
    PressKey(Keys.P, true);
    PressKey(Keys.ControlKey, true);
}