Question

in my mvc3 roject, I return the Json object:

 return Json(new { ID = guid, FileName = file.FileName, FullPath = filename });

then, in the JS code, I try to acces to the fields, e.g:

            onComplete: function (event, queueId, fileObj, response, data) {
                alert(response.ID); //test
            }

but i get the undefined message. If i just get the alert(response); I see the valid object:

{"ID":"22186ea1-a56a-45d1-9d13-d19f003dedf9","FileName":"file.txt","FullPath":"some_path"}

so how to access to that properties ?

Answer 1

You’re probably seeing the JSON text that needs to be parsed into JavaScript data structures.

var parsed = JSON.parse(response);

alert( parsed.ID ); 

---

Without parsing it, you’re trying to access the ID property of a String object.

var str = '{"ID":"22186ea1-a56a-45d1-9d13-d19f003dedf9","FileName":"file.txt","FullPath":"some_path"}';

alert( str.ID );  // undefined