WPF-从背后的代码打开/关闭键盘

Question

There's a custom touchscreen keyboard in my app built according to this: https://www.codeproject.com/Articles/32568/A-Touch-Screen-Keyboard-Control-in-WPF . I also have a ResourceDictionary containing all styles and templates. In the TextBox style, I can set the keyboard ON/OFF:

<Style TargetType="{x:Type TextBox}">     
    <Setter Property="FontSize" Value="14" />
    <Setter Property="Padding" Value="4" />
    <Setter Property="k:TouchScreenKeyboard.TouchScreenKeyboard" Value="True"/>
</Style>

I would like the user to be able to turn it on or off from the UI, but can't figure out how to reach this property from code behind. I would like to make it without naming the style, since it's pretty commonly used throughout the app. I tried this, but (no surprise) get ArgumentNotFoundException:

Style s = Application.Current.FindResource("defTextBox") as Style;
s.RegisterName("Keyboard.TouchScreenKeyboard.TouchScreenKeyBoard",false);

Any help would be appreciated!

Answer 1

You shoud be able to set the TouchScreenKeyboard attached property for an individual TextBox like this:

TouchScreenKeyboard.SetTouchScreenKeyboard(textBox1, false);

Changing the defintion of the implicit Style itself after it has already been applied to all TextBox elements doesn't make much sense though. You should define the default value in XAML and then change the value for individual TextBoxes dynamically at runtime if you need to.