Question

Is it possible to not show system keyboard, when you tap textbox? Ive created custom keyboard and can work with textblock only, because of this i cant delete just parts of sentence.

Answer 1

If you set IsReadOnly to true then the user can still select the text in a TextBox to copy paste and the OS doesn’t show the software input keyboard when selected. You can still alter the contents of the TextBox through code though. Eg;

<TextBox x:Name="ExampleTextBox"
         IsReadOnly="True"
         Text="Initial Content" 
         GotFocus="ExampleTextBox_GotFocus"
         />

And in your code behind;

private void ExampleTextBox_GotFocus(object sender, System.Windows.RoutedEventArgs e) {
  ExampleTextBox.Text += " ... focused!";
}

Would prevent the user from entering text via the software keyboard but will append “… focused” everytime they give focus to the TextBox. Contrived example, but you get the idea.

The only other thing I’d suggest is to re-style the TextBox. By default when IsReadOnly is set the TextBox will provide visual cues that it can’t be modified by the user. Which isn’t the case here.