覆盖文本框中的 Ctrl 键？

Question

Is it possible to have a textbox ignore Ctrl + character function and reassign a different use for the ctrl key?

Situation: I have multiple text boxes on a Form. Ideally I would like the textboxes to jump from one textbox to another after enter in a single character. However the textbox can have more than one input, in this case I want the user to hold ctrl to stay on the textbox while they enter in multiple characters.

Essentially, I want my ctrl (if held down) to stop the textbox from jumping.

I've tried using a combination of OnKeyDown , OnKeyUp and TextChanged event to handle when the Ctrl key is pressed, but in the end, I can't enter any data once the Ctrl key is held down. Is there a way around this?

The reason for this is because 95 percent of the time its always 1 character. Therefore to quickly traverse through the textboxes, the user would hit a single character. However in the unlikelihood that the user wants to enter in 2 digits, they can hold Ctrl (So it doesn't jump to the next textbox) and enter in 2 digits as desired.

Answer 1

Like the commenters said, there's probably a better way of doing this, in a UI sense. That you would press CTRL to prevent switching textboxes is weird behavior. Having said that, using the following in KeyDown should get you what you were trying to do.

if (!(e.Control && char.IsLetterOrDigit((char) e.KeyCode)))
{
    return;
}

txtBox.Text += (new KeysConverter()).ConvertToString(e.KeyCode);
e.Handled = true;