how can I set CharacterCasing property on avalonedit?

Question

I need only Uppercase on avalonedit.

how can I attach the property? Or is there any other alternate way?

Answer 1

There's no built-in feature for that.

I think the best way to implement this is to handle the TextArea.TextEntering event. If the input text isn't all uppercase, abort the text input by setting e.Handled = true;, and call TextArea.PerformTextInput() again with the uppercase version.