<selectid='name'class="form-control selectpicker"data-live-search="true">

1. $.ajax({  
2. // get請求地址  
3.     url: basePath,  
4.     dataType: "json",  
5.     success: function (data) {  
6.     var optArr = [];  
7.         for (var i = 0; i <data.length; i++) {  
8.             $('.selectpicker').append("<option
   value=" + data[i].userName + ">" + data[i].userName + "</option>");  
9.         }  
10.         // 缺一不可  
11.         $('#name').selectpicker('refresh');  
12.         $('#name').selectpicker('render');  
13.     }  
14. });