I can get simple examples to work fine as long as there's no master page involved. All I want to do is click a button and have it say "hello world" with the javascript in a .js file, using a master page. Any help very much appreciated :)
+13
A:
Just move the <script type="text/javascript" src="jquery.js" /> tag into the head tag in the master page. Then you can use jquery in all content pages.
There is no magic about using master pages with jQuery.
gius
2008-11-15 17:58:04
+10
A:
EDIT
As @Adam points out in the comments, there is a native jQuery mechanism that basically does the same thing as the hack in my original answer. Using jQuery you can do
$('[id$=myButton]').click(function(){ alert('button clicked'); });
My hack was originally developed as a Prototype work around for ASP.NET and I adapted it for the original answer. Note that jQuery basically does the same thing under the hood. I recommend using the jQuery way, though, over implementing my hack.
Original answer left for comment context
When you use a master page, ASP.NET mangles the names of the controls on the dependent pages. You'll need to figure out a way to find the right control to add the handler to (assuming you're adding the handler with javascript).
I use this function to do that:
function asp$( id, tagName ) {
var idRegexp = new RegExp( id + '$', 'i' );
var tags = new Array();
if (tagName) {
tags = document.getElementsByTagName( tagName );
}
else {
tags = document.getElementsByName( id );
}
var control = null;
for (var i = 0; i < tags.length; ++i) {
var ctl = tags[i];
if (idRegexp.test(ctl.id)) {
control = ctl;
break;
}
}
if (control) {
return $(control.id);
}
else {
return null;
}
}
Then you can do something like:
jQuery(asp$('myButton','input')).click ( function() { alert('button clicked'); } );
where you have the following on your child page
<asp:Button ID="myButton" runat="server" Text="Click Me" />
tvanfosson
2008-11-15 18:00:45
I'm pretty new at this and had no idea about the name-mangling. I'll give this a go later. I appreciate it.
Keith Myers
2008-11-15 18:12:07
Get used to using the 'View source' (Or equivalent) on your browser.This allows you not only to check that your pages are rendering the ay that you want them to, but to learn tricks from othe people's pages.
belugabob
2008-12-09 14:06:09
is that a deliberate typo '$asp' v 'asp$'? i couldnt get this to work - it picks up the control ok but jQuery call doesn't work for some reason
flesh
2008-12-20 12:25:00
I've corrected the typo.
tvanfosson
2009-03-18 20:05:15
You are WAY over-engineering this. You can replace this whole function with $('[id$=myButton]').click(function(){ alert('button clicked'); });
Adam Lassek
2009-03-18 20:13:34
Actually, this was before I used jQuery much at all and the hack was a Prototype replacement with usage adapted for jQuery. I've moved on to ASP.NET MVC and thankfully don't have to worry about name mangling at all.
tvanfosson
2009-03-18 20:19:37
Using the ClientID to get the control name is a much simpler method and will always work because no matter what the master/content page creates as a ID, the javascript in the content page will correctly hard code in on generation. Though it wouldn't work on any included javascript files. :(
achinda99
2009-03-18 20:34:22
That makes sense. I just wanted to say something so people know this isn't even close to best practice.
Adam Lassek
2009-03-18 20:37:33
@achinda99: Simpler? I beg to differ; it forces you to tightly-couple server-side code with frontend javascript and markup. If the id of the elements in question are likely to change, you can give it a css class and select it that way.
Adam Lassek
2009-03-18 20:41:58
@Adam - your way is the easiest. http://stackoverflow.com/questions/1274806/selecting-by-id-attribute-using-jquery-in-asp-net
Jagd
2010-06-15 17:48:04
+1
A:
Master page:
The jQuery library goes in the master page. See if the path is correctly referenced. You might like to add the extra documentation like this:
<head>
<script type="text/javascript" src="/Scripts/jquery-1.2.6.min.js"></script>
<% if (false) { %>
<script type="text/javascript" src="/Scripts/jquery-1.2.6-vsdoc.js"></script>
<% } %>
</head>
Master page:
<head>
<script type="text/javascript">
$(document).ready(
function()
{
alert('Hello!');
}
);
</script>
</head>
CodeBehind for content pages and user controls:
this.textBox.Attributes.Add("onChange",
String.Format("passElementReferenceToJavascript({0})", this.textBox.ClientID));
Patrick de Kleijn
2008-11-15 18:20:42
+1
A:
Check out this post:
http://blogs.msdn.com/webdevtools/archive/2008/10/28/rich-intellisense-for-jquery.aspx
also explains how to get intellisense for jQuery in Visual studio.
Stefan
2008-11-15 19:33:17
+4
A:
Reference the the Jquery .js file in the head of the MasterPage as follows:
<script type="text/javascript" src="/Scripts/jquery-1.2.6.min.js"></script>
(some browsers don't like ending it with />)
Then you can write things like
$('#<%= myBtn.ClientID%>').show()
in your javascript making sure to use the ClientId when referencing an ASP.Net control in your client code. That will handle any "mangling" of names and ids of the controls.
Jared
2008-11-15 20:03:12
Should I have expected this to work?$('#<%= Button1.ClientID%>').click(function() { alert('Hello world!'); });This code is in my .js file. I know I have everything set up correctly because if I copy the 'mangled' id from the page source it works fine.
Keith Myers
2008-11-15 21:10:20
The <% %> syntax only works within the .aspx file. So if you want to use that, you need to put your script in a <script> block within your aspx file.
AaronSieb
2008-12-05 16:38:27
+14
A:
If your site has content pages in other folders, using the Page's ResolveUrl method in the src path will ensure that your js file can always be found:
<script type="text/javascript" src='<%= ResolveUrl("~/Scripts/jquery-1.2.6.min.js") %>' ></script>
djuth
2008-11-19 01:59:27
+8
A:
Make sure that jQuery is being added in the master page. Given that you have this control:
<asp:Button ID="myButton" runat="server" Text="Submit" />
You can wireup the javascript with this:
$(document).ready(function() {
$('[id$=myButton]').click(function() { alert('button clicked'); });
});
$(document).ready() fires when the DOM is fully loaded, and all the elements should be there. You can simplify this further with
$(function() {});
The selector syntax $('[id$=myButton]') searches elements based on their id attribute, but matches only the end of the string. Conversely, '[id^=myButton]' would match the beginning, but for the purposes of filtering out the UniqueID that wouldn't be very useful. There are many many more useful selectors you can use with jQuery. Learn them all, and a lot of your work will be done for you.
The problem is that ASP.Net creates a unique id and name attribute for each element, which makes finding them difficult. It used to be that you'd need to pass the UniqueID property to the javascript from the server, but jQuery makes that unneccessary.
With the power of jQuery's selectors, you can decouple the javascript from the server-side altogether, and wireup events directly in your javascript code. You shouldn't have to add javascript into the markup anymore, which helps readability and makes refactoring much easier.
Adam Lassek
2009-03-18 20:24:27
A:
I also started with the simplest of examples and had no luck. I finally had to add the jquery .js file outside of the <head> section of the master page. It was the only way I could get anything to work in Firefox (haven't tried other browsers just yet).
I also had to reference the .js file with an absolute address. Not entirely sure what's up with that one.
scottmarlowe
2009-07-24 14:02:04
+4
A:
Adam's solution is the best. Simple!
Master page:
<head runat="server">
<title></title>
<link href="~/Styles/Site.css" rel="stylesheet" type="text/css" />
<script src="Scripts/jquery-1.3.2.js" type="text/javascript"></script>
<asp:ContentPlaceHolder ID="HeadContent" runat="server">
</asp:ContentPlaceHolder>
</head>
Content page:
<asp:Content ID="HeaderContent" runat="server" ContentPlaceHolderID="HeadContent">
<script type="text/javascript">
$(document).ready(function () {
$("[id$=AlertButton]").click(function () {
alert("Welcome jQuery !");
});
});
</script>
</asp:Content>
where the button is
<asp:Button ID="AlertButton" runat="server" Text="Button" />
Andrei Drynov
2010-02-26 17:10:22