Solved

javascript from code behind or button

Posted on 2014-10-07
8
277 Views
Last Modified: 2014-10-08
I'm using some code I found here to be able to reorder a list in asp.net. Users pick items and add to list then reorder them.

Everything works great but I need to change it for my situation. Currently it doesn't reorder my list in the DB until an item is dragged and resorted.

I want to be able to add a "save" button that will force this script to run and reorder everything even if the user never reorders it themselves manually by dragging.

I googled like crazy how to run javascript from codebehind or a button and found hundreds of examples but none of them work for me. I'm 99% sure that it's me who is the problem here, not the solutions I've tried so I don't know where else to turn to except here.

Here is the javascript.

<script type="text/javascript">

         $(function () {
             $('#sortable').sortable({
                 placeholder: 'highlight',
                 update: OnSortableUpdate
             });
             $('#sortable').disableSelection();

             var progressMessage = 'Saving changes... <img src="loading.gif"/>';
             var successMessage = 'Saved successfully!';
             var errorMessage = 'There was some error in processing your request';
             var messageContainer = $('#message').find('p');

             function OnSortableUpdate(event, ui) {
                 var order = $('#sortable').sortable('toArray').join(',').replace(/id_/gi, '')
                 //console.info(order);

                 messageContainer.html(progressMessage);

                 $.ajax({
                     type: 'POST',
                     url: 'Sortable.asmx/UpdateItemsOrder',
                     data: '{itemOrder: \'' + order + '\'}',
                     contentType: 'application/json; charset=utf-8',
                     dataType: 'json',
                     success: OnSortableUpdateSuccess,
                     error: OnSortableUpdateError
                 });
             }

             function OnSortableUpdateSuccess(response) {
                 if (response != null && response.d != null) {
                     var data = response.d;
                     if (data == true) {
                         messageContainer.html(successMessage);
                     }
                     else {
                         messageContainer.html(errorMessage);
                     }
                 }
             }

             function OnSortableUpdateError(xhr, ajaxOptions, thrownError) {
                 messageContainer.html(errorMessage);
             }

         });

    </script>

Open in new window

0
Comment
Question by:someonenamedbrendan
[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
  • 3
  • 3
  • 2
8 Comments
 
LVL 83

Expert Comment

by:Dave Baldwin
ID: 40367366
The code you are showing looks like jQuery to me.  To use jQuery code, you must load the jQuery library first.  And that has to be done in the page that is running the javascript because all that is done in the browser, not on the server.
0
 

Author Comment

by:someonenamedbrendan
ID: 40367475
I just snipped the script I need run out of the .aspx page. The script runs fine and is doing everything it's supposed to do. I just want to be able to run it on command... like via a button on the page or in code behind.

But I guess I should change my question to how to run this jquery from code behind.
0
 
LVL 83

Expert Comment

by:Dave Baldwin
ID: 40367484
As far as I know, to run it "on command" it would have to be a 'named' function that can be called by that name.  Then you could put 'onclick()' in an element like a button on that page.  What you are showing is a 'generic' function that runs when the web browser encounters it on page load.
0
Independent Software Vendors: We Want Your Opinion

We value your feedback.

Take our survey and automatically be enter to win anyone of the following:
Yeti Cooler, Amazon eGift Card, and Movie eGift Card!

 
LVL 58

Expert Comment

by:Julian Hansen
ID: 40367737
Try adding this
  $('#sortable').on('sortupdate', OnSortableUpdate);
	
  $('#save').click(function() {
    $('#sortable').trigger('sortupdate');
  });

Open in new window

0
 

Author Comment

by:someonenamedbrendan
ID: 40368522
either i'm using that incorrectly or it didnt work and broke the drag and drop. :(
0
 
LVL 58

Accepted Solution

by:
Julian Hansen earned 500 total points
ID: 40368835
Can you post your code - I managed to get it to work see below
<!doctype html>
<html>
<head>
<title>Test</title>
<link rel="stylesheet" href="//code.jquery.com/ui/1.11.1/themes/smoothness/jquery-ui.css">
<script src="http://code.jquery.com/jquery.js"></script>
<script src="//code.jquery.com/ui/1.11.1/jquery-ui.js"></script>
<script type="text/javascript">
$(function() {
  $('#sortable').sortable({
    placeholder: 'highlight',
    update: OnSortableUpdate
  });
  
  $('#sortable').on('sortupdate', OnSortableUpdate);
  
  $('#save').click(function() {
    $('#sortable').trigger('sortupdate');
  });
  
  $('#sortable').disableSelection();

  var progressMessage = 'Saving changes... />';
  var successMessage = 'Saved successfully!';
  var errorMessage = 'There was some error in processing your request';
  var messageContainer = $('#message').find('p');

  function OnSortableUpdate(event, ui) 
  {
    var order = $('#sortable').sortable('toArray').join(',').replace(/id_/gi, '')
    //console.info(order);

    messageContainer.html(progressMessage);

    $.ajax({
      type: 'POST',
      url: 'e002.php',
      data: '{itemOrder: \'' + order + '\'}',
      contentType: 'application/json; charset=utf-8',
      dataType: 'json',
      success: OnSortableUpdateSuccess,
      error: OnSortableUpdateError
    });
  }

  function OnSortableUpdateSuccess(response) 
  {
    if (response != null && response.d != null) {
      var data = response.d;
      if (data == true) {
        messageContainer.html(successMessage);
      }
      else {
        messageContainer.html(errorMessage);
      }
    }
  }

  function OnSortableUpdateError(xhr, ajaxOptions, thrownError) {
    messageContainer.html(errorMessage);
  }
});
</script>
<style type="text/css">
</style>
</head>
<body>
<div class="ui-widget" id="message">
  <div class="ui-state-highlight ui-corner-all" style="margin-top: 20px; padding: 0 .7em;">
    <p>
      Reorder Items
    </p>
  </div>
</div>
<ul id="sortable">
  <li class="ui-state-default" id="a_1"><span class="ui-icon ui-icon-arrowthick-2-n-s"></span>Item 1</li>
  <li class="ui-state-default" id="a_2"><span class="ui-icon ui-icon-arrowthick-2-n-s"></span>Item 2</li>
  <li class="ui-state-default" id="a_3"><span class="ui-icon ui-icon-arrowthick-2-n-s"></span>Item 3</li>
  <li class="ui-state-default" id="a_4"><span class="ui-icon ui-icon-arrowthick-2-n-s"></span>Item 4</li>
  <li class="ui-state-default" id="a_5"><span class="ui-icon ui-icon-arrowthick-2-n-s"></span>Item 5</li>
  <li class="ui-state-default" id="a_6"><span class="ui-icon ui-icon-arrowthick-2-n-s"></span>Item 6</li>
  <li class="ui-state-default" id="a_7"><span class="ui-icon ui-icon-arrowthick-2-n-s"></span>Item 7</li>
</ul>
<input type="button" value="Save" id="save"/>
</body>
</html>

Open in new window

0
 

Author Comment

by:someonenamedbrendan
ID: 40368945
I tried a bunch of different things and kept getting errors in the javascript debugger. "uncaught typeerror" for example. So, for fun a removed all my jquery references:
  <script src="http://ajax.googleapis.com/ajax/libs/jquery/1.4.4/jquery.min.js" type="text/javascript"></script>

    <script src="http://ajax.googleapis.com/ajax/libs/jqueryui/1.8.8/jquery-ui.min.js" type="text/javascript"></script>


     <script src="http://code.jquery.com/mobile/1.3.1/jquery.mobile-1.3.1.min.js"></script>
     <script src="../Scripts/jquery.ui.touch-punch.min.js"></script>

Open in new window


and replaced them with yours and the errors went away and the save button works.

Thanks.
0
 
LVL 58

Expert Comment

by:Julian Hansen
ID: 40369166
You are welcome - thanks for the points.
0

Featured Post

Free Tool: Port Scanner

Check which ports are open to the outside world. Helps make sure that your firewall rules are working as intended.

One of a set of tools we are providing to everyone as a way of saying thank you for being a part of the community.

Question has a verified solution.

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

This article shows how to deploy dynamic backgrounds to computers depending on the aspect ratio of display
Today, the web development industry is booming, and many people consider it to be their vocation. The question you may be asking yourself is – how do I become a web developer?
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…
Suggested Courses

623 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