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JQuery dynamic change of descriptions in dropdownlist

Posted on 2013-10-30
10
Medium Priority
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Last Modified: 2013-11-19
I have a dynamically vreated dropdownlist with some monetary ranges show like this:

0 to 500
501 to 1000
1001 to 2000
...

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I have the following code:

<option value="<%=(RS_Fee01("FeeId"))%>"><span id="currencyindicator"></span><%=(RS_Fee01("AmountFrom"))%> to <span id="currencyindicator"></span><%=(RS_Fee01("AmountTo"))%></option>

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I would like it to show the values like this:

£0 to £500
£501 to £1000
£1001 to £2000
...

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Or this:

$0 to $500
$501 to $1000
$1001 to $2000
...

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I would like to use the JQuery to set a value in the #currencyindicator span on change of currency (another dropdownlist on the same form).

As a quick and dirty test set I set a hard coded value to see if I could get the dropdownlist description updated. It didn't work!

$('#currencyid').change(function() {
	$('span#currencyindicator').text("£");
});

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Doesn't seem to be cutting it... ideas?

Regards,
0
Comment
Question by:splanton
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10 Comments
 
LVL 82

Expert Comment

by:leakim971
ID: 39611816
test page : http://jsfiddle.net/fvq5D/

$(document).ready(function(){
    $('#currencyid').change(function() {
        createDropdown($(this).val());
    }).change();
});
function createDropdown(currency) {
    var index = $('#mySelect').prop('selectedIndex');
    $('#mySelect').empty();
    for(var i=0;i<2000;i+=500) {
        var min = currency + (i+(i>0?1:0));
        var max = currency + (i+500);
        var str = min + ' to ' + max;
        $('#mySelect').append('<option value="' + str + '">' + str + '</option>');
    }
    if(index>=0) $('#mySelect').prop('selectedIndex', index);
}

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0
 
LVL 54

Expert Comment

by:Scott Fell, EE MVE
ID: 39611853
leakim971 is much better at this stuff then I am and I am sure this can be improved.  

I noticed you are using asp to dynamically generate your code.  One option would be to use asp to write out your js.  If you need to write out html.  Something like below where you are writing your range in the html option data-from and data-to.  You can then access that via jquery to generate the option text.

http://jsbin.com/EyoyEFU/1/edit

<select id="currency">
       <option value="$">$</option>
     <option value="£">£</option>
  </select>  
  
  <select id="money">
  <option value="1" data-from="0" data-to="500"></option>
  <option value="2" data-from="501" data-to="1000"></option>
  <option value="3" data-from="1001" data-to="2000"></option>
  </select>

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$(function() {
var currencyindicator='$';
$('select#currency').change(function(){
  currencyindicator=$(this).val();
  $('#money option').each(function(){
     var from=$(this).attr('data-from');
      var to=$(this).attr('data-to');
    $(this).text(currencyindicator+from+'-'+currencyindicator+to);
  });
});
  $('#money option').each(function(){
     var from=$(this).attr('data-from');
      var to=$(this).attr('data-to');
    $(this).text(currencyindicator+from+'-'+currencyindicator+to);
  });
  
  
}); 
  

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0
 
LVL 54

Expert Comment

by:Scott Fell, EE MVE
ID: 39611862
  <select id="money">
  <option value="1" data-from="0" data-to="500"></option>
  <option value="2" data-from="501" data-to="1000"></option>
  <option value="3" data=from="1001" data-to="2000"></option>
  </select>

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convert to


  <option value="<%=(RS_Fee01("FeeId"))%>" data=from="%=(RS_Fee01("AmountFrom"))%>" data-to="%=(RS_Fee01("AmountTo"))%>"></option>

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0
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LVL 54

Expert Comment

by:Scott Fell, EE MVE
ID: 39611878
Also, remember in your html, id's are unique, classes are not.  

In your original code you had, <span id="currencyindicator">.  Besides the fact the span does not work in the option, it would have created multiple id's.  Had that worked, you would have wanted to use a class instead of id.
0
 
LVL 44

Accepted Solution

by:
Chris Stanyon earned 2000 total points
ID: 39611981
Always good to have options:

$('#currencyid').change(function() {
	var currency = $(this).val();
	
	$('#money option').each(function() {
		var values = $(this).text().split(' to ');
		$.each(values, function(i, val) {
			values[i] = currency + values[i].replace( /^\D+/g, '');	
		});
		$(this).text(values.join(' to '));
	});
});

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<select id="currencyid">
	<option value="$">Dollar</option>
	<option value="£">Pound</option>
</select>


<select id="money">
	<option value="1">0 to 500</option>
	<option value="2">501 to 1000</option>
	<option value="3">1001 to 2000</option>
</select>

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An option can't contain HTML so you can't include <spans> etc..
0
 
LVL 44

Expert Comment

by:Chris Stanyon
ID: 39611998
Oops - Forgot the fiddle - http://jsfiddle.net/ChrisStanyon/AbSML/
0
 
LVL 54

Expert Comment

by:Scott Fell, EE MVE
ID: 39612187
>Always good to have options:
and a very good one at that!
0
 
LVL 58

Expert Comment

by:Gary
ID: 39612217
Why not just use CSS :before or am I missing something?

e.g.

li span:before{
content: "$";
}
0
 
LVL 44

Expert Comment

by:Chris Stanyon
ID: 39612262
@Gary - the OP needs to dynamically change <options> based on another dropdown.
0
 
LVL 58

Expert Comment

by:Gary
ID: 39612378
Ahh thought it was a UL not a select - didn't read that properly.
0

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