jQuery get select option value
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Asif Khalyani asked me a simple question today, but it is worth noting because I have asked the same before, “How do you get the current value from a select list?”
t’s looking for an element with id list which has a property value equal to 2. What you want is the option child of the list.
$(“#list option[value='2']“).text()
But sometimes you may need to get the selected option’s text. This is not as straight forward. First, we get the selected option with :selected selector. Then once we have the option, we can get the text with the function, text().
$("#list option:selected").text();
$j("#txt_employee_name option:selected").val() // Get the Option ID
Getting a form value with jQuery
To get a form value with jQuery use the val() function. Let's say we have a form like this, using an id for each form element:<input name="foo" id="foo" type="text"> <select name="foo" id="bar"> <option value="1">one</option> <option value="2">two</option> <option value="3">three</option> </select>We can display an alert for the values of "foo" and "bar" as easily this:
window.alert( $('#foo').val() ); window.alert( $('#bar').val() );If we're using the name only and not specifying an id, the jQuery to get the form values would be this:
window.alert( $('[name=foo]').val() ); window.alert( $('[name=bar]').val() );If you have a group of radio buttons and want to get the selected button, the code is slightly different because they all have the same name. Using the above code examples will show the value for the first radio button on the form with that name. To find out the value of the checked one, do this instead:
HTML:<input type="radio" name="baz" value="x"> <input type="radio" name="baz" value="y"> <input type="radio" name="baz" value="z">jQuery:
window.alert($('input[name=baz]:checked').val());Setting a form value with jQuery
You can set the form values with jQuery using the same val() function but passing it a new value instead. Using the same example forms above, you'd do this for the text input and select box:
$('#foo').val('this is some example text'); $('#bar').val('3'); OR $('[name=foo]').val('this is some example text'); $('[name=bar]').val('3');Using the above for a radio button will change the actual value of the radio button rather than changing the one that is selected. To change the radio button that is selected you'd do this:
$('input[name="baz"]')[0].checked = true;[0] would set the first one checked, [1] would set the second one checked and so on.
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