keyeventargs

Is there a way to determine if a key is letter/number ( A-Z , 0-9 ) in the KeyEventArgs ? Or do I have to make it myself? I found a way with e.KeyCode , is that accurate? if(((e.KeyCode >= Keys.A && e.KeyCode <= Keys.Z ) || (e.KeyCode >= Keys.D0 && e.KeyCode <= Keys.D9 ) || (e.KeyCode >= Keys.NumPad0 && e.KeyCode <= Keys.NumPad9)) You can use the char.IsLetterOrDigit() method on the KeyCode of the event args: bool isLetterOrDigit = char.IsLetterOrDigit((char) keyEventArgs.KeyCode); Char.IsNumber() and Char.IsLetter() In WPF? Use PreviewTextInput or TextInput events instead of KeyDown 来源： https

I need to get the event args as a char , but when I try casting the Key enum I get completely different letters and symbols than what was passed in. How do you properly convert the Key to a char? This is what I've tried ObserveKeyStroke(this, new ObervableKeyStrokeEvent((char)((KeyEventArgs)e.StagingItem.Input).Key)); Edit: I also don't have the KeyCode property on the args. I'm getting them from the InputManager.Current.PreNotifyInput event. Wallstreet Programmer See How to convert a character in to equivalent System.Windows.Input.Key Enum value? Use KeyInterop.VirtualKeyFromKey instead.

I have question about the KeyEventArgs 's KeyCode and KeyData and KeyValue . KeyCode and Keydata are Keys type, but I don't know what the difference between them is. For KeyValue , I don't know what it is -- it has an int type, does it return the char value of the pressed key? I don't have much experience with Key events; any explanation of how they function and how to use them would be greatly appreciated. KeyCode contains data for the key that produced the KeyUp or KeyDown event. KeyData contains the combination of that key together with CTRL, SHIFT or ALT if any of those were pressed.