Solved

I need the correct jQuery syntax to change an image

Posted on 2011-09-30
13
199 Views
Last Modified: 2012-05-12
I have images in a jqGrid and need to reset the image to empty when resetting the row. But I am having a hard time with the syntax for getting and setting the image's path.

I have the id of the image which is unique on the page. The jqGrid is called "samples".

Please look at the code below for an idea of what I am trying to do and suggest a better syntax, since this does not work at all.

Thanks,
newbieweb
var imageField = $('#samples img[id='+imageId+']');
if ( $(imageField).src.substr(imageField.src.lastIndexOf('/')+1) != "empty.gif" ) 
{ 
     $(imageField).src = "~/Content/images/empty.gif";
}

Open in new window

0
Comment
Question by:newbieweb
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
  • 9
  • 4
13 Comments
 
LVL 55

Expert Comment

by:Huseyin KAHRAMAN
ID: 36895563
just use

var imageField = $('#samples img[id='+imageId+']');
-->
var imageField = $('#'+imageId);
0
 

Author Comment

by:newbieweb
ID: 36895569
you mean the following?

var imageField = $('#'+imageId);

then...
if ( $(imageField).src.substr(imageField.src.lastIndexOf('/')+1) != "empty.gif" )
{
     $(imageField).src = "~/Content/images/empty.gif";
}

or...
if ( imageField.src.substr(imageField.src.lastIndexOf('/')+1) != "empty.gif" )
{
     imageField.src = "~/Content/images/empty.gif";
}
0
 
LVL 55

Expert Comment

by:Huseyin KAHRAMAN
ID: 36895570
this is also fine!

var imageField = $('#samples [id='+imageId+']');
0
Instantly Create Instructional Tutorials

Contextual Guidance at the moment of need helps your employees adopt to new software or processes instantly. Boost knowledge retention and employee engagement step-by-step with one easy solution.

 
LVL 55

Expert Comment

by:Huseyin KAHRAMAN
ID: 36895572
also this is fine

var imageField = $('#samples img[id='+imageId+']');

I dont understand where is your problem :)
0
 
LVL 55

Expert Comment

by:Huseyin KAHRAMAN
ID: 36895576
this should do

  alert(imageField.attr("src"));
  if ( imageField.attr("src").substr(imageField.attr("src").lastIndexOf('/')+1) != "empty.gif" ) {
     $(imageField).src = "~/Content/images/empty.gif";
  }
0
 

Author Comment

by:newbieweb
ID: 36895577
Oh, my syntax was okay?

Maybe it's in my use of the following?

 $(imageField).src

I also tried:

imageField.src

with no success
0
 

Author Comment

by:newbieweb
ID: 36895579
Ok, I will try that and let you know in a minute...
0
 
LVL 55

Expert Comment

by:Huseyin KAHRAMAN
ID: 36895580
your issue is not to find the image, but to get the src attribute :) which I posted above...
0
 
LVL 55

Expert Comment

by:Huseyin KAHRAMAN
ID: 36895581
or no jQuery, simple javascript will do the same


  alert(document.getElementById(imageId).src);
0
 
LVL 55

Expert Comment

by:Huseyin KAHRAMAN
ID: 36895584
also you should use

$(imageField).src = "~/Content/images/empty.gif";
-->
imageField.attr("src", "~/Content/images/empty.gif");
0
 
LVL 55

Accepted Solution

by:
Huseyin KAHRAMAN earned 500 total points
ID: 36895590
so, final syntax

var imageField = $('#samples img[id='+imageId+']');
if ( imageField.attr("src").substr(imageField.attr("src").lastIndexOf('/')+1) != "empty.gif" ) {
 imageField.attr("src","~/Content/images/empty.gif");
}
0
 
LVL 55

Assisted Solution

by:Huseyin KAHRAMAN
Huseyin KAHRAMAN earned 500 total points
ID: 36895592
one more issue... ~ does not work on clientside (unless you really have a folder with name ~)

you should use

 imageField.attr("src","/Content/images/empty.gif");
0
 

Author Closing Comment

by:newbieweb
ID: 36895597
Thanks! Unfortunately the web service is down and I can not test this code. But it looks great. Thanks!
0

Featured Post

Salesforce Has Never Been Easier

Improve and reinforce salesforce training & adoption using WalkMe's digital adoption platform. Start saving on costly employee training by creating fast intuitive Walk-Thrus for Salesforce. Claim your Free Account Now

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

In Part 1 (http://www.experts-exchange.com/Programming/Languages/Scripting/JavaScript/A_7849-Hex-Maze.html) we covered the hexagonal maze basics -- how the cells are represented in a JavaScript array and how the maze is displayed.  In this part, we'…
Having worked on larger scale sites, we found out that you are bound to look at more scalable solutions to integrating widgets, code snippets or complete applications and mesh them into functional sites, in any given composition. To share some of…
The viewer will learn the basics of jQuery, including how to invoke it on a web page. Reference your jQuery libraries: (CODE) Include your new external js/jQuery file: (CODE) Write your first lines of code to setup your site for jQuery.: (CODE)
The viewer will learn the basics of jQuery including how to code hide show and toggles. Reference your jQuery libraries: (CODE) Include your new external js/jQuery file: (CODE) Write your first lines of code to setup your site for jQuery…

717 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question