Question

I am passing json obj in the function parameter. Json contains User id, password, success call and error call.

I want to authentic the user via ajax service. if the service returns success the access the successcallback function or returns error then access the errorcallback function.

 JSON Obj : Json_Obj =  { "UserId" : "uid", 
                           "Password" : "pwd", 
                           "Success_CB" : "successcallback()",
                           "Failure_CB" : "errorcallback()",
                          };

I am able to parse the Json_Obj

  Authentication = function(data) {
    var json_data = $.parseJSON(data);
    $.ajax({
           type: "GET",
            .
            .
           success:function(data){
             json_data.Success_CB;   // Unable to Execute the success call back function.
            },
             error:function(xhr,err){
                    json_data.Failure_CB
             }
   });
 }          

   // Call Back Functions 

      successcallback(){
           alert("Success");
      }
      errorcallback(){
           alert("Error");
      }

I am unable to access/execute the callback functions.

Please help me out on this..

Answer 1

json_data.Success_CB is a string, not a function.

You may do this :

success:function(data){
    eval(json_data.Success_CB+'();');
}

But instead of evaluating any received code, you might prefer to use a switch.

Of course if the function to call isn’t related to the precise data, you may simply do

success: successcallback