down | 易学教程

Two html drop down list event

阅读更多关于 Two html drop down list event

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 问题: I have two html drop down list, their value are retrieved from the database by using jsp. <% String query =" SELECT question_text,question_id FROM questions WHERE id = ?"; PreparedStatement stmt = conn.prepareStatement(query); stmt.setString(1,request.getParameter("QID")); ResultSet rs = stmt.executeQuery(); if(!rs.next()) {} else {%> <form action="#" method="post"> <p> First Question </p> <select name="currentQuestion"> <%do{%> <option value="<%=rs.getString("question_id")%>"><%=rs.getString("question_text")%> </option> <%}while(rs.next());

Dynamic down cast to abstract class (C++)

阅读更多关于 Dynamic down cast to abstract class (C++)

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 问题: I am trying to learn some object orientated programming aspect I know from java in C++. However I am having some difficulties in using dynamic_cast where I would use instanceof in Java. I have a base class Cell and a derived (abstract) class Obstacle . I have defined it like this: Obstacle : public Cell and Obstacle contains a pure virtual destructor. Now in the Cell class I want to implement a method bool Cell::isAccesible() . I've implemented this as follows: bool Cell::isAccessible() { Obstacle *obs = dynamic_cast<Obstacle*>(this); if

Positioning the drop down window of a HTML SELECT

阅读更多关于 Positioning the drop down window of a HTML SELECT

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 问题: I am using an HTML SELECT tag and want to make sure the window that opens when the user hits the arrow to position below the "textbox" part of the control. The problem is that IE seems to just open the window arbitrarily depending on the selection but I need to ensure consistent positioning as there are other elements on the page that need to remain visible at all times Here's the current markup <!DOCTYPE html> <html lang="en" xmlns="http://www.w3.org/1999/xhtml"> <head> <meta charset="utf-8" /> <title></title> </head> <body> <div style=

md-select drop down selection

阅读更多关于 md-select drop down selection

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 由翻译强力驱动问题: we have a md-table with 20 rows. each row will have a drop down and three values. select, accept and deny. I am trying to select the value accept or deny but i get element not visible error. i tried adding waitforAngular and sleep time. but it doesnt seem to work. it clicks on the drop down and later fails without clicking on accept. Any suggestions. thanks element . all ( by . model ( 'result.status' )). get ( 0 ). click (); browser . driver . sleep ( 2000 ); browser . waitForAngular (); //select.$('[value="Accept"]').click();

drop down list keep previous selected value in php

阅读更多关于 drop down list keep previous selected value in php

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 由翻译强力驱动问题: I have created a profile page in php where a user using an html drop down list chooses gender. The html code is the following: Gender < select name = "gender" > < option value = " " > EMPTY </ option > < option value = "Male" > Male </ option > < option value = "Female" > Female </ option > </ select > After the user chooses gender the form dispatches and saves the data into database. All I want is that the next time that the user visits the profile page, the drop down list to keep the value that the user selected before. For

Android capturing volume up/down key presses in broadcast receiver?

阅读更多关于 Android capturing volume up/down key presses in broadcast receiver?

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 由翻译强力驱动问题: I'm trying to make an application where the user can override the default behaviour of the volume up/down buttons (as well as the screen on/off button - is this possible?). Anyways, using some code along the lines of the following I can do this: @Override public boolean onKeyDown ( int keyCode , KeyEvent event ) { super . onKeyUp ( keyCode , event ); if (( keyCode == KeyEvent . KEYCODE_VOLUME_UP )) { //this is where I can do my stuff return true ; //because I handled the event } return false ; //otherwise the system can handle it }

Is it faster to count down than it is to count up?

阅读更多关于 Is it faster to count down than it is to count up?

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 问题: Our computer science teacher once said that for some reason it is more efficient to count down than to count up. For example if you need to use a FOR loop and the loop index is not used somewhere (like printing a line of N * to the screen) I mean that code like this: for (i = N; i >= 0; i--) putchar('*'); is better than: for (i = 0; i Is it really true? And if so, does anyone know why? 回答1: Is it really true? and if so does anyone know why? In ancient days, when computers were still chipped out of fused silica by hand, when 8-bit

Databound drop down list - initial value

阅读更多关于 Databound drop down list - initial value

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 问题: How do I set the initial value of a databound drop down list in ASP.NET? For instance, I want the values, but the first value to display should be -- Select One ---, with a null value. 回答1: I think what you want to do is this: Make sure the 'AppendDataBoundItems' is set to true or else you will clear the '--Select One--' list item when you bind your data. If you have the 'AutoPostBack' property of the drop down list set to true you will have to also set the 'CausesValidation' property to true then use a 'RequiredFieldValidator' to make sure

What characters can be used for up/down triangle (arrow without stem) for display in HTML?

阅读更多关于 What characters can be used for up/down triangle (arrow without stem) for display in HTML?

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 问题: I'm looking for a HTML or ASCII character which is a triangle pointing up or down so that I can use it as a toggle switch. I found ↑ ( ↑ ), and ↓ ( ↓ ) - but those have a narrow stem. I'm looking just for the HTML arrow "head". 回答1: Unicode arrows heads: ▲ - U+25B2 BLACK UP-POINTING TRIANGLE ▲ and respectively if you cannot include Unicode characters directly (use UTF-8!). Note that the font support for the smaller versions is not as good. Better to use the large versions in smaller font. More Unicode arrows are at: http://en.wikipedia.org

Margin-Top push outer div down

阅读更多关于 Margin-Top push outer div down

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 问题: I have a header div as the first element in my wrapper div, but when I add a top margin to a h1 inside the header div it pushes the entire header div down. I realize this happens whenever I apply a top margin to the first visible element on a page. Here is a sample code snippet. Thanks! div#header{ width: 100%; background-color: #eee; position: relative; } div#header h1{ text-align: center; width: 375px; height: 50px; margin: 50px auto; font-size: 220%; background: url('../../images/name_logo.png') no-repeat; } Title 回答1: put overflow:auto

订阅 down