keyeventargs

How to capture the spacebar press event using KeyeventHandler?

由 ╄→尐↘猪︶ㄣ 提交于 2021-02-08 10:56:33
问题 I have a Form with a rich text box in which i want to do the following: When user presses the spacebar button (Currently i am doing it with keydown event but want to use key press event but it doesn't provide e.keycode), a function should be called in which this logic is to be implemented: last written word is to be fetched and is to be looped through the text of rich text box in order to find its number of occurrences in a rich text box. What i have done so far is: private void textContainer

How to capture the spacebar press event using KeyeventHandler?

由 邮差的信 提交于 2021-02-08 10:55:34
问题 I have a Form with a rich text box in which i want to do the following: When user presses the spacebar button (Currently i am doing it with keydown event but want to use key press event but it doesn't provide e.keycode), a function should be called in which this logic is to be implemented: last written word is to be fetched and is to be looped through the text of rich text box in order to find its number of occurrences in a rich text box. What i have done so far is: private void textContainer

How to capture the spacebar press event using KeyeventHandler?

由 旧巷老猫 提交于 2021-02-08 10:55:27
问题 I have a Form with a rich text box in which i want to do the following: When user presses the spacebar button (Currently i am doing it with keydown event but want to use key press event but it doesn't provide e.keycode), a function should be called in which this logic is to be implemented: last written word is to be fetched and is to be looped through the text of rich text box in order to find its number of occurrences in a rich text box. What i have done so far is: private void textContainer

How to capture the spacebar press event using KeyeventHandler?

由 心已入冬 提交于 2021-02-08 10:54:15
问题 I have a Form with a rich text box in which i want to do the following: When user presses the spacebar button (Currently i am doing it with keydown event but want to use key press event but it doesn't provide e.keycode), a function should be called in which this logic is to be implemented: last written word is to be fetched and is to be looped through the text of rich text box in order to find its number of occurrences in a rich text box. What i have done so far is: private void textContainer

KeyEventArgs.Key to char

由 橙三吉。 提交于 2019-12-23 07:02:05
问题 Is there any way to convert WPF's KeyEventArgs.Key to Char ? I tried to use KeyInterop : var x = (Char)KeyInterop.VirtualKeyFromKey(e.Key); For numbers and letters it works fine, but for other characters it doesn't. E.g. for OemComma it returns '1/4' instead of ','. I need it to prevent user of inputting into TextBox any characters except numbers and separators (i.e. commas or periods). 回答1: UPDATE: the comment below found the original http://stackoverflow.com/a/5826175/187650 Found this

Convert a System.Windows.Input.KeyEventArgs key to a char

由 为君一笑 提交于 2019-12-12 07:48:11
问题 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. 回答1: See How to convert a character in to

Can I determine if a KeyEventArg is an letter or number?

由 一世执手 提交于 2019-12-10 01:21:17
问题 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)) 回答1: You can use the char.IsLetterOrDigit() method on the KeyCode of the event args: bool isLetterOrDigit = char.IsLetterOrDigit((char) keyEventArgs.KeyCode); 回答2:

KeyEventArgs.KeyData, KeyEventArgs.KeyCode and KeyEventArgs.KeyValue

由 倾然丶 夕夏残阳落幕 提交于 2019-12-09 04:50:21
问题 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. 回答1: KeyCode contains data for the key that produced the KeyUp or KeyDown event.

How to get pressed char from System.Windows.Input.KeyEventArgs?

由 无人久伴 提交于 2019-12-06 19:00:56
问题 I have System.Windows.Input.KeyEventArgs e variable. I want to get real char. For example, i press } button on keyboard. And normally it returns string like oem.. but i want to get } char. How to do ? [EDIT] I use this in TextBox . 回答1: See this post... how to capture the '#' character on different locale keyboards in WPF/C#? it has a utility function called GetCharFromKey(Key key) which gets locale specific character from the Key of the Keyboard event args. Very useful. 回答2: Sometimes you

How to get pressed char from System.Windows.Input.KeyEventArgs?

由 不羁岁月 提交于 2019-12-05 01:38:20
I have System.Windows.Input.KeyEventArgs e variable. I want to get real char. For example, i press } button on keyboard. And normally it returns string like oem.. but i want to get } char. How to do ? [EDIT] I use this in TextBox . WPF-it See this post... how to capture the '#' character on different locale keyboards in WPF/C#? it has a utility function called GetCharFromKey(Key key) which gets locale specific character from the Key of the Keyboard event args. Very useful. Sometimes you just need to solved the problem with a sledgehammer. char KeyToChar(Key key) { if (Keyboard.IsKeyDown(Key
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