WPF PasswordBox: How do I warn a user that Caps Lock is enabled?

Question

Does anyone know how to implement the standard bubble message that warns users whenever Caps Lock is enabled and a password control has focus? Is this built into the .NET framework, or do I need to write my own class to do this?

Schatz

Did you solve this? I was looking for the same? – Undesirable

Follow: [How to give warning to user with balloon in wpf][1] [1]: https://mcmap.net/q/585826/-warn-about-capslock/… – Arbour

Use Keyboard.IsKeyToggled for CapsLock key and manually show tooltip or hint. – Resolution

Answer 1

You could add a handler function to the PasswordChanged event handler and test for the value of the CapsLock key in that function. If found to be on, you could pop-up a message from there.

Keelykeen

This will do the trick! To detect CapsLock in the event handler, just check the boolean value of: Keyboard.IsKeyToggled(Key.CapsLock) – Schatz

This answer is useless: 1. PasswordChanged happen TOO LATE. Much better to react on 'GotFocus'. 2. HOW EXACTLY we can check status of CapsLock key? That was the question. – Resolution

Answer 2

This is an old question, and already answered, but I came across this same problem and I first started with Keyboard.IsKeyToggled(Key.CapsLock) but that returned false if Caps Lock was set prior to the application running. So I found another solution that works perfectly.

Console.CapsLock //is boolean and returns true if CapsLock is on

Absolutely brilliant and simple (it's in the mscorlib dll so you don't have to worry about unneeded dependencies either)

Marnamarne

It's wrong solution. You had to use Keyboard.IsKeyToggled – Resolution

Answer 3

If you use a MaskedTextBox and specify a passwordChar the .NET framework will automatically do this for you

Bracing

I believe MaskedTextBox is a WinForms control - I'm using WPF. I'd like to be able to continue using the PasswordBox because of its built-in security. – Schatz