checkbox

问题 I am trying to learn rails from zero programming experience and have an app im trying to make. With much help from people on here, I have an index page of venues which are filterable by which area they belong to via a dropdown menu. I would like to be able to have the same affect but using checkboxes and also being able to select multiple areas to add to the filter. This is what I have so far: Model : class Venue < ActiveRecord::Base belongs_to :user has_many :reviews belongs_to :area scope

问题 I currently have a rails check_box_tag call that looks like check_box_tag #{name} I want to include a checked attribute, which I know I can do with check_box_tag name, value, checked But what if I want to set it to checked without explicitly specifying value (I just want to use the default). Or similarly, what if I wanted to specify html options without specifying the checked attribute. Is there a way to do this? 回答1: Just wanted to update this. The third parameter for check_box_tag is a

问题 I am using my custom adapter. There is a checkbox and a text view in each row. But i have a problem. There are more items in the list than the number which fits on the screen. So when i check any of the checkboxes on the screen and scroll down. The automatically get unchecked. When i scroll up again some random checkboxes get checked. I know that in getView() list is being refreshed again and again and theres an issue of the position. But dont know the solution. I have tried using a boolean

问题 Problem: I want to validate some ASP.NET-checkboxes using the jquery validation plugin (found at: http://bassistance.de/jquery-plugins/jquery-plugin-validation/) What it's all about: It's not possible to set the name attribute of ASP.NET checkboxes (or is it?). It'll automatically be set, when the control is rendered and can be retrieved using <%= emailCheckBox.UniqueID %> So two checkboxes as the following: <asp:CheckBox runat="server" ID="emailAcceptCheckBox" />Email<br /> <asp:CheckBox

问题 I have built treeGrid with embedded checkbox in column "name", such as JSON data : {"id":"1","name":"<input type='checkbox' class='itmchk' ><strong>ECHANGEUR<\/strong>","level":"0","parent":"null","isLeaf":false,"expanded":true,"loaded":true} because these checkboxes follow tree margins (I hope I'm fine understood because I'm french). I would like to check/uncheck sublevels checkboxes when I mark/unmark one row but after reading may posts, I can obtain the expected result. Explanation for

问题 I made a script in order to control master & slave checkboxes (automatic checking and unchecking). Here is my JS : $(document).ready(function() { $('#myCheck').click(function() { $('.myCheck').attr('checked', false); }); $('.myCheck').click(function() { if ($('.myCheck').is(':checked')) { $('#myCheck').attr('checked', false); } else { $('#myCheck').attr('checked', true); // IT DOESN'T WORK, WHY ? alert("Checkbox Master must be checked, but it's not!"); } }); }); And here is my HTML : <input

问题 I made a script in order to control master & slave checkboxes (automatic checking and unchecking). Here is my JS : $(document).ready(function() { $('#myCheck').click(function() { $('.myCheck').attr('checked', false); }); $('.myCheck').click(function() { if ($('.myCheck').is(':checked')) { $('#myCheck').attr('checked', false); } else { $('#myCheck').attr('checked', true); // IT DOESN'T WORK, WHY ? alert("Checkbox Master must be checked, but it's not!"); } }); }); And here is my HTML : <input

问题 How would someone go about adding check boxes to only the children of a tree view in XAML? My goal is to have a tree view where the parent is just a text block and all the children are check boxes but only one child can be checked at a time. I have no problem making the whole the tree view check boxes but I am not sure how to get what I really want Any suggestions? Thanks. 回答1: Try this Working with Checkboxes in the WPF TreeView. 回答2: Why don't you just do it in code? Like this: TreeViewItem

问题 What's the cleanest way I can make a checkbox automatically submit the form it belongs to in Wicket? I don't want to include a submit button at all. The checkbox is backed by a boolean field in a domain object ("Account" in this case). Simplified example with irrelevant parts omitted: EntityModel<Account> accModel = new EntityModel<Account>(Account.class, id); PropertyModel<Boolean> model = new PropertyModel<Boolean>(accModel, "enabled"); CheckBox checkBox = new CheckBox("cb", model); Form

问题 How do you simply validate that a checkbox is checked in rails? The checkbox is for a end user agreement. And it is located in a modal window. Lets say i have the checkbox: <%= check_box_tag '' %> Where and how should i validate this? I have seen most posts about checkbox validation in rails here, but none of them suit my needs. 回答1: Adding validates :terms_of_service, :acceptance => true to your model should do it. Look here for more details and options. However, if accepting the terms is