C# 触发键盘按键事件而不按键盘上的键
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Trigger a keyboard key press event without pressing the key from keyboard
提问by ridoy
How can I trigger a key press event without pressing the key from Keyboard? I tried with the solution from here, but I got the following exception:
如何在不按键盘键的情况下触发按键事件？我尝试使用此处的解决方案，但出现以下异常：
The best overloaded method match for 'System.Windows.PresentationSource.FromVisual(System.Windows.Media.Visual)' has some invalid arguments.
'System.Windows.PresentationSource.FromVisual(System.Windows.Media.Visual)' 的最佳重载方法匹配有一些无效参数。
Consider Shift+Acontains 2 key press event from keyboard,how can I do it without keyboard pressing?(let, just print capital A in a textbox on a button click)
考虑Shift+A包含来自键盘的 2 个按键事件，如何在不按下键盘的情况下执行此操作？（让，只需在单击按钮时在文本框中打印大写 A）
My code
我的代码
var key = Key.A; // Key to send
var target = Keyboard.FocusedElement; // Target element
var routedEvent = Keyboard.KeyDownEvent; // Event to send
target.RaiseEvent(new System.Windows.Input.KeyEventArgs(Keyboard.PrimaryDevice, System.Windows.PresentationSource.FromVisual(target), 0, key) { RoutedEvent = routedEvent });
采纳答案by ridoy
System.Windows.Forms.SendKeys.Send()has done the trick for me.
System.Windows.Forms.SendKeys.Send()已经为我解决了这个问题。
For advanced instructions and the list of available codes, consult the docs for the method.
有关高级说明和可用代码列表，请参阅方法的文档。
For example, to send Shift+AI used SendKeys.Send("+(a)").
例如，发送Shift+A我使用SendKeys.Send("+(a)").
回答by Murtuza Kabul
Easy and reliable way to simulate the keyboard event is to use the keybd_event api
模拟键盘事件的简单可靠的方法是使用 keybd_event api
You can get reference to it here
你可以在这里得到参考
http://www.pinvoke.net/default.aspx/user32.keybd_event
http://www.pinvoke.net/default.aspx/user32.keybd_event
There are further articles on it here
这里有更多关于它的文章
http://www.codeproject.com/Articles/7305/Keyboard-Events-Simulation-using-keybd_event-funct
http://www.codeproject.com/Articles/7305/Keyboard-Events-Simulation-using-keybd_event-funct
回答by Sami Franka
You need to cast to Visual:
你需要投射到Visual：
var key = Key.A; // Key to send
var target = Keyboard.FocusedElement; // Target element
var routedEvent = Keyboard.KeyDownEvent; // Event to send
target.RaiseEvent(new System.Windows.Input.KeyEventArgs(Keyboard.PrimaryDevice,
System.Windows.PresentationSource.FromVisual((Visual)target), 0, key) { RoutedEvent = routedEvent });
You could also specify that your target is a specific textbox for example :
您还可以指定您的目标是特定的文本框，例如：
var target = textBox1; // Target element
What the code actually does is trigger the keydown event for a specific element. So it makes sense to have a keydown handler for it :
代码实际做的是触发特定元素的 keydown 事件。因此，为其设置一个 keydown 处理程序是有意义的：
private void textBox1_KeyDown(object sender, System.Windows.Input.KeyEventArgs e)
{
}
