javascript - function error() { [native code]} -


i have asp.net web site in c#.

on dropdownlist onchange() event i'm calling jquery function, throws:

function error(){[native code]}   <script type="text/javascript">      function getdescription(a) {          alert(a); // dropdown item selected value          var id = (!isnan($(a).val())) ? parseint($(a).val()) : 0;          $.ajax({              type: 'post',              contenttype: "application/json; charset-8;",              url: 'wt.aspx/getref',              data: "{ 'id':'" + id + "'}",              success: function (data) {                  alert(data);              },              error: function (data) {                  alert(error);              }           });       }   </script>

wt.aspx/getref

       [webmethod]      public string getref(int id)      {          datatable dt = new datatable();          sqlparameter[] p = new sqlparameter[1];          p[0] = new sqlparameter("@refid", id);          dt = dl.getdatawithparameters("sp_wt_getref", p);           string data = dt.rows[0]["description"].tostring() +"|"+ dt.rows[0]["priceinusd"].tostring();           return data;      }

http://localhost:54576/resources/demos/style.css failed load resource: server responded status of 404 (not found) http://localhost:54576/automobilewebapp/wt.aspx/getref failed load resource: server responded status of 500 (internal server error) http://localhost:54576/resources/demos/style.css failed load resource: server responded status of 404 (not found)

my first suggestion make method attributed [webmethod] static. 

[webmethod]  public static string getref(int id)  {      datatable dt = new datatable();      sqlparameter[] p = new sqlparameter[1];      p[0] = new sqlparameter("@refid", id);      dt = dl.getdatawithparameters("sp_wt_getref", p);       string data = dt.rows[0]["description"].tostring() +"|"+ dt.rows[0]["priceinusd"].tostring();       return data;  }

if didn't work out, try check whether ajax url pointing method correctly. 

url: 'wt.aspx/getref',

and check whether passing 'this' function parameter getdescription(a).

 <select onchange="getdescription(this)">     <option value="1">text1</option>     <option value="2">text2</option>     <option value="3">text3</option>  </select>

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