WPF等效于SendInput？

Question

是否有相当于WPF的SendInput？我看过AutomationPeer课,但没有成功.

我只想发送一个Keydown(Enter键).简单地引发event(RaiseEvent)在我的场景中不起作用.

这就是我所拥有的,这是有效的.我更喜欢托管代码替代方案.

    private void comboSelectionChanged(object sender, SelectionChangedEventArgs args)
    {
        ((ComboBox)sender).Focus();
        // send keydown
        INPUT input = new INPUT();
        input.type = INPUT_KEYBOARD;
        input.union.keyboardInput.wVk = 0x0D;
        input.union.keyboardInput.time = 0;
        SendInput(1, ref input, Marshal.SizeOf(input));
    }

    [DllImport("user32.dll", SetLastError = true)]
    private static extern int SendInput(int nInputs, ref INPUT mi, int cbSize);

    [StructLayout(LayoutKind.Sequential)]
    private struct INPUT
    {
        public int type;
        public INPUTUNION union;
    };

    [StructLayout(LayoutKind.Explicit)]
    private struct INPUTUNION
    {
        [FieldOffset(0)]
        public MOUSEINPUT mouseInput;
        [FieldOffset(0)]
        public KEYBDINPUT keyboardInput;
    };

    [StructLayout(LayoutKind.Sequential)]
    private struct MOUSEINPUT
    {
        public int dx;
        public int dy;
        public int mouseData;
        public int dwFlags;
        public int time;
        public IntPtr dwExtraInfo;
    };

    [StructLayout(LayoutKind.Sequential)]
    private struct KEYBDINPUT
    {
        public short wVk;
        public short wScan;
        public int dwFlags;
        public int time;
        public IntPtr dwExtraInfo;
    };

    private const int INPUT_MOUSE = 0;
    private const int INPUT_KEYBOARD = 1;

Answer 1

您可以模拟这样的击键:

public void SendKey(UIElement sourceElement, Key keyToSend)
    {

        KeyEventArgs args = new KeyEventArgs(InputManager.Current.PrimaryKeyboardDevice, PresentationSource.FromVisual(sourceElement), 0, keyToSend);

        args.RoutedEvent = Keyboard.KeyDownEvent;
        InputManager.Current.ProcessInput(args);

    }

然后你可以像这样调用它:

SendKey(myComboBox, Key.Enter);

我想你可以把它放在static class某个地方,甚至可以把extension method它拿出来.但是,我认为在大多数情况下,有一种更优雅的方法来实现这一目标.

我希望这有帮助.