keycode

how to stop a button from being fired when press enter

由 我只是一个虾纸丫 提交于 2019-12-25 04:43:26
问题 I am using this function to handle enter click on a search textbox but it fires another button in the page, how to stop that button from being fired and call my search() function. InputKeyPress(e) { if (window.event) { if (event.keyCode == 13) { search(); } } else { if (e) { if (e.which == 13) { search(); } } } } 回答1: In the keyCode == 13 case, you need to prevent the default action of the keypress event. The standard way to do this is to call the preventDefault function on the event object

how to stop a button from being fired when press enter

由 懵懂的女人 提交于 2019-12-25 04:43:03
问题 I am using this function to handle enter click on a search textbox but it fires another button in the page, how to stop that button from being fired and call my search() function. InputKeyPress(e) { if (window.event) { if (event.keyCode == 13) { search(); } } else { if (e) { if (e.which == 13) { search(); } } } } 回答1: In the keyCode == 13 case, you need to prevent the default action of the keypress event. The standard way to do this is to call the preventDefault function on the event object

WPF detect key sequence

由 南笙酒味 提交于 2019-12-24 20:54:12
问题 I would like to hide a groupox from my WPF app and to manually enable it when I need it via a keypress code when app is active(not minimized) this example works sometimes with just one keypress, but I need a sequence protected override void OnPreviewKeyDown(KeyEventArgs e) { base.OnPreviewKeyDown(e); if (e.Key == Key.B) { bdgb.Visibility = Visibility.Visible; } } 回答1: You could for example override the OnPreviewKeyDown method of your window, e.g.: protected override void OnPreviewKeyDown

How to disable Enter/Return Key After a function is executed because of it?

由 走远了吗. 提交于 2019-12-24 10:39:08
问题 I have this function where #text_comment is the ID of a textarea: $('#text_comment').live('keypress',function (e) { if(e.keyCode == 13) { textbox = $(this); text_value = $(textbox).val(); if(text_value.length > 0) { $(this).prev().append('<div id="user_commenst">'+text_value+'</div>'); $(textbox).val(""); } } }); What is happening is the text is appending when the enter/return key is hit (keyCode 13), but it is also moving the text a line down, as the enter/return key is supposed to. This is

Convert sequence of System.Windows.Forms.Keys to a Char

由 无人久伴 提交于 2019-12-24 03:53:44
问题 Is there a way to convert a sequence of keystrokes represented by the Keys enum (i.e. System.Windows.Forms.Keys ) in a Char. For example: Keys.Oem4 and then Keys.A yields the char á . It must exist somewhere in the WinAPI, because Windows does that for me, when I press keys inside a text-box... I just don't know where. Please help! thanks. EDIT: What I want is to record the user input keys, and later translate the sequence of keys to characters, without the user having to type everything

jquery keypress event to trigger autocomplete only on specific keycodes

由 主宰稳场 提交于 2019-12-24 01:25:45
问题 I am using the jquery autocomplete plugin, and am trying to trigger the autocomplete manually based on certain keys the user enters. I'm trying to bind the autocomplete to the input on the fly so the autocomplete can start looking for matches once a user enters a certain key to trigger "I'm now entering data to be searched on", which could be in the middle of the field, not necessarily at the beginning. I'm binding a keypress event to an input. When the user enters a certain key, like "=", I

WinForm开发(75)——C# WinFrom捕获按键按下事件

由 末鹿安然 提交于 2019-12-24 00:49:44
C# WinFrom对于控件的所有事件在其属性窗口都能找到对应的属性，按键事件也不例外。 要为对应的事件添加事件处理，只需双击其属性，VS 即可自动生成框架代码，C# 对按键的处理主要有3个事件，分别是KeyDown，KeyUp和KeyPress事件，VS上的属性视图对他们的描述如下： KeyDown：Occurs when a key is first pressed.（当按键被按下时触发） KeyUp：Occurs when a key is released.（当按键释放时触发） KeyPress：Occurs when the control has focus and the user presses and releases a key.（当得到焦点并且用户按下或释放按键时触发） 下面使用几个例子来分别介绍这3种不同的事件： 一、KeyDown事件： 双击属性视图里的KeyDown事件，VS会自动生成如下框架代码： private void tbIP1_KeyDown(object sender, KeyEventArgs e) { } 其中tbIP1是控件的名字，现在为其添加相应的处理： private void tbIP1_KeyDown(object sender, KeyEventArgs e) { MessageBox.Show("KeyCode:" + e

iPhone returning same keydown event for (hash and 3) and (Asterisk and 8)

由 别来无恙 提交于 2019-12-23 12:09:16
问题 Am working on phone validation and have a requirement of auto formatting the input with phone no and only allow numeric characters to be added . However when i try to restrict the input using keydown and keypress, IPhone is allowing me to enter # and * . When i checked the keydown value , they both are same with 3 and 8 respectively (keycode 51 and 56). This works perfectly in Android browsers but fails in iPhone. Anyone faced similar issue. $(formSelector + ' input[name^="phone"]').on(

How is a return / enter keypress encoded in a string sent to a SSH shell?

由 我的未来我决定 提交于 2019-12-23 09:49:40
问题 I am making a SSH client for a special device which does not have a return key on it's keyboard, my question is how is the return key encoded in the string sent to the shell? is it just '\n'? 回答1: Then Enter key sends the character 13 = \015 = 0x0d = \r = ^M = CR (carriage return). You can observe that by typing Ctrl + V then Enter in a terminal: Ctrl + V tells the shell to insert the next character literally instead of interpreting it as a command. You can select a different end-of-line

Using unicode for a custom android keyboard

由 自闭症网瘾萝莉.ら 提交于 2019-12-23 02:28:07
问题 I am creating a Bhutanese keyboard for an android App. I am using unicode. However, I am getting error messages when I try to run the app that say "error parsing keycode", and the letters do not show up when they are pressed. Here is a sample of the keyboard xml file: <?xml version="1.0" encoding="utf-8"?> <Keyboard xmlns:android="http://schemas.android.com/apk/res/android" android:keyWidth="10%p" android:horizontalGap="0px" android:verticalGap="0px" android:keyHeight="60dp"> <Row> <Key
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