Dropdown getdata from ajax

[Ittipon]

Sample I have <select class="my_dropdown" > </select>

in getdata from ajax i need change How do?.

when i get data from ajax 

success 
$('.my_dropdown').html(data);

[Lukas]

var dropdownlist = $("#someID").data("kendoDropDownList");
dropdownlist.dataSource.data([{text:"newText",value:"newValue"}]);

i think it works, didn't test it