TextBox autocomplete and default buttons

Question

I have a .NET TextBox with AutoComplete feature on the form. The form has also AcceptButton and CancelButton defined. If I try to commit a suggestion with Enter key or close

Answer 1

instead to Accept and Cancel buttons you can go for the following approach:

1. Set KeyPreview property for the form to true.

2. Handle the KeyDown event of the form, in the handler method you can have something similar to the below code

   switch (e.KeyCode)
   {
       case Keys.Enter:
       {
           if (!txtAuto.Focused)
           {
               Save();
           }
           break;
       }
       case Keys.Escape:
       {
           if (!txtAuto.Focused)
           {
               Close();
           }
           break;
       }
   }