yad4u Detect if an element is selected in listbox or not through jquery


Detect if an element is selected in listbox or not through jquery



I have a multiselect listbox and before submitting the form i want to check whether user select any option or not through jquery




asp.net mvc 2 - Model Binding and Select Lists

1:



Simple DropDownListFor in MVC2?
You could use the .val() function to get the selected values.


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For a multi select it returns an array of the selected values or null if no element has been selected:.
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if ($('#idofselect').val() != null) {     // user has selected at least one value } 


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2:



erb <% expression -%> in aspx pages
Does this work for you:.
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$("#formID").submit(function() {   var selectValue = $('#selectList').val();   if(selectValue != null)   {       // blah   } }); 


3:


$('#list option:selected').length 
Will get the amount of selected objects i think.

(replace '#list' with your selector obviously)..



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