Question

30

Find previous value of drop down list on change event

rated 0 times [ 34] [ 4] / answers: 1 / hits: 16373 / 11 Years ago, fri, june 7, 2013, 12:00:00

I have drop down list declared like :

    <asp:DropDownList ID=myDropDown width=300 CssClass=textboxda 

AutoPostBack=True runat=server onmousewheel=return false; />

Drop down list change method

myDropDown.Attributes.Add(OnChange, return OnChange(););





function OnChange()

{

    var $j = jQuery.noConflict();



    var sel = $j(this).prevAll(#myDropDown:first),

      val = sel.val(),

      text = sel.find(':selected').text(); 



    alert(text);

}

I am populating this drop down dynamically.

I am fetching the last/previously selected text of the drop down, but this is not working.

Please suggest.

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jarettajb

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answered 11 Years ago jeffn · Accepted Answer

myDropDown.Attributes.Add(OnChange, return OnChange(this););

after that you can put another attribute for current selected item

myDropDown.Attributes.Add(previous, your default selected value);

after that your function like this

function OnChange(args)

{



 var previousVal=$(args).attr('previous');

var newVal=$(args).find(':selected'); 

alert(previousVal);

alert(newVal);

$(args).attr('previous',newVal);

}