我开发一个屏幕上的小键盘的触摸WPF应用程序。这将出现在弹出。当一个按钮为pressed，应发送键击到应用程序，使它看起来就像用户打字成文本框。这是我的code：

I am developing an on-screen numpad for a WPF touch app. This will appear in a Popup. When a button is pressed, it should send a keystroke to the application, making it look as though the user was typing into a TextBox. This is my code:

// 'key' is set beforehand
InputManager.Current.ProcessInput(new KeyEventArgs(Keyboard.PrimaryDevice, Keyboard.PrimaryDevice.ActiveSource, Environment.TickCount, key) { RoutedEvent = Control.KeyDownEvent });

这就是所谓的 Button.Click 事件处理程序中。

This is called within the Button.Click event handler.

到目前为止，只有 Key.Back 工作过。没有数字键的工作，而且也不 Key.Decimal 。

So far only Key.Back has worked. None of the digit keys work, and neither does Key.Decimal.

编辑：我想用的SendKeys 将解决这个问题，但它只是做同样的事情

I thought using SendKeys would solve the problem, but it just does the same thing.

为什么我的数字按钮的工作？我已经验证了正确的键被传递。

Why aren't my digit buttons working? I have verified that the correct Key is being passed.

推荐答案

根据我们的意见的讨论，我建议你考虑这样的方法。我不知道的全部要求，但分裂的功能，并使得应用较少的单片始终是一个很好的方法！

Following our discussions in comments, I suggest you consider an approach like this. I don't know the full requirement, but splitting the functionality up and making the application less monolithic is always a good approach!

一起来，伪UML图会是这样的：

First up, a pseudo-UML diagram would be this:

如下您的三个功能将实施（伪code）：

Your three functions would be implemented as follows (pseudocode):

UserControl1.InsertCharacter(string character)
{
    textBox1.Text = textBox1.Text.Insert(textBox1.CaretIndex, character); 
    this.ValidateInput();
}

UserControl1.ValidateInput()
{
    // Perform validation
}

UserControl1.OnKeyDown()
{
    // Perform validation
    this.ValidateInput();
}

UserControl2.AppendCharacter(string clickedCharacter)
{
    this.userControl1.InsertCharacter(clickedCharacter); 
}

要进一步分离UserControl2距离的UserControl1正如我所说，你可以使用事件触发模式，如.NET事件或EventAggregator。

To further decouple UserControl2 from UserControl1 as I mentioned you could use eventing patterns such as .NET events or EventAggregator.