jQuery - select option in select box [duplicate]

Answer 1

You can do this by adding the selected attribute in <option> tag.

$(document).ready(function () {
    $('#btn2').click(function(){
        $('#sel1 option[value=2]').attr('selected','selected');
    });
    $('#btn3').click(function(){
        $('#sel1 option[value=3]').attr('selected','selected');
    });
    $('#btn5').click(function(){
        $('#sel1 option[value=5]').attr('selected','selected');
    });
});

<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.6.3/jquery.min.js"></script>
<select id="sel1">
    <option value='1'>Option 1</option>
    <option value='2'>Option 2</option>
    <option value='3'>Option 3</option>
    <option value='4'>Option 4</option>
    <option value='5'>Option 5</option>
    <option value='6'>Option 6</option>
    <option value='7'>Option 7</option>
    <option value='8'>Option 8</option>
    <option value='9'>Option 9</option>    
</select>
<input id="btn2" type=button value='Select 2' />
<input id="btn3" type=button value='Select 3' />
<input id="btn5" type=button value='Select 5' />

Answer 2

Of course you can

Just use this code to select option 5:

$("#ComboBox").val(5);

example

Answer 3

Just treat the select box as you would any other input element:

$("#MySelectBox").val("5");

Answer 4

If I understand you correctly, you want to select the option with value=5 and mark it selected. If so, this should be it:

$("#selectBox[value='5']").attr('selected', 'selected');

This should also work:

$("#selectBox").attr('value', 5).attr('selected', 'selected');

Answer 5

All you have to do is go around setting the attribute selected to true or selected.

var arrayOfOptions = $('#mySelect option') //will return an array of options in the order they are found

Just iterate over them, something like:

for(var i=0; i<arrayOfOptions.length; i++) {
   var opt = arrayOfOptions[i];
   //feel free to check the index of i here if you want to set
   //a particular index to selected or a range.
   //similarly the range can be passed in as a function parameter.
   $(opt).attr('selected','selected');

}