SendKeys.Send 并关闭按键修饰符

发布于 2024-07-14 09:49:50 字数 351 浏览 9 评论 0原文

我想让 ^N 与树控件中的向下箭头一样工作。 我想 我只需将以下内容添加到 KeyDown 处理程序中:

SendKeys.Send("{Down}");

但这会被视为 Control-Down 箭头,因为 control 键 当前被按下。 msdn 页面 描述了如何打开 控制修饰符,但不知道如何关闭它。

谢谢, 基思

I want to make ^N work the same as Down arrow in a tree control. I thought
I'd just have to add the following to the KeyDown handler:

SendKeys.Send("{Down}");

but this gets treated as a Control-Down arrow since the control key
is currently pressed. The msdn page
describes how to turn on the
control modifier but not how to turn it off.

Thanks,
Keith

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评论(4

叹沉浮 2024-07-21 09:49:50

抱歉来晚了,但我想我找到了一个解决方案:

首先,导入 SetKeyboardState:

[DllImport("user32.dll")]
public static extern bool SetKeyboardState(byte[] lpKeyState);

然后,在调用 SendKeys.Send() 之前用归零的字节数组调用它:

SetKeyboardState(new byte[256]);
SendKeys.Send("your key sequence");

这对我有用。 希望这可以帮助!

Sorry to come late to the party but I think I found a solution:

First, import SetKeyboardState:

[DllImport("user32.dll")]
public static extern bool SetKeyboardState(byte[] lpKeyState);

Then, just call it with a zeroed byte array before calling SendKeys.Send():

SetKeyboardState(new byte[256]);
SendKeys.Send("your key sequence");

That worked for me. Hope this helps!

风为裳 2024-07-21 09:49:50

您可以 p/调用 keybd_event。 这将让您模拟处于“向上”和“向下”状态的按键。

You can p/invoke to keybd_event. That will let you simulate a key being both in "up" and "down" state.

疯狂的代价 2024-07-21 09:49:50

这是做到这一点的困难方法。 我承认这不是最佳方法。 我相信你已经知道这一点了。 您可能想要重载控件的 WindProc 方法。 使用 SendMsg Win32 Api。 这就是我过去如何让事情恢复正常的。

Here's the hard way of doing it. I admit this is not the optimal way to do it. I'm sure you already know this. You might want to overload the WindProc method of the control & use SendMsg Win32 Api. This is how I used get things to work back in the day.

陌若浮生 2024-07-21 09:49:50

您也可以尝试等到不再按下控制键时才KeySend,例如:

while (System.Windows.Input.Keyboard.IsKeyDown(Key.LeftCtrl))
{
    // lets try again after a while
    System.Threading.Thread.Sleep(250);
}
SendKeys.Send("{Down}");

You can also try to wait until the control key is no longer pressed and only then KeySend, e.g.:

while (System.Windows.Input.Keyboard.IsKeyDown(Key.LeftCtrl))
{
    // lets try again after a while
    System.Threading.Thread.Sleep(250);
}
SendKeys.Send("{Down}");
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