jquery how to deserialize json object [duplicate]

Question

How can you deserialize this json object below?

[{"id":"67","name":"TestString"}]

I tried to do this below but couldnt succeed...

success: function (data, status) {
          $.each(data, function (dt) {

              var mydata = data.d;

              alert(mydata); // returns [{"id":"67","name":"TestString"}]

              $("#txt_speciality").tokenInput("add", mydata.id);
          });
}

here is the way I am creating the json object

[WebMethod]
public static string get_specialities(string ProfessionalID)
{
    Database db = DatabaseFactory.CreateDatabase("Connection String2");
    DbCommand dbCommand;
    dbCommand = db.GetStoredProcCommand("Select_Professionals_Speciality");
    db.AddInParameter(dbCommand, "prof_id", DbType.Int16, Convert.ToInt16(ProfessionalID));
    IDataReader dr = db.ExecuteReader(dbCommand);
    //[{ id: 3, name: "test3" }]
    string return_str="[";
    int i = 0;
    while (dr.Read()) {
        if (i > 0)
            return_str += ",";
        return_str += "{\"id\":\"" + dr["SpecialtyID"].ToString().Trim() + "\",\"name\":\"" + dr["SpecialtyName"].ToString().Trim() + "\"}";
        i++;
    }
    return_str += "]";
    return return_str;
}

It looks like you might be double json-encoding on the server-side. — user400654
– user400654, Commented Apr 4, 2013 at 14:18
Are you retrieving it as JSON or as text? Please share the rest of your AJAX call. — Blazemonger
– Blazemonger, Commented Apr 4, 2013 at 14:19
Rather than writing the Json yourself (in your c#) you may find it easier, and less error prone, to use a tool like JSON.Net: james.newtonking.com/projects/json-net.aspx — Liam
– Liam, Commented Apr 4, 2013 at 14:25
.net actually contains class for json handling: msdn.microsoft.com/ru-ru/library/… — Tommi
– Tommi, Commented Apr 4, 2013 at 14:30

Alex · Accepted Answer · 2013-10-03 15:20:25Z

29

You can do this with:

var mydata; // [{"id":"67","name":"TestString"}]

var json = $.parseJSON(mydata);

the json variable will contain the de-serialized json object

edited Oct 3, 2013 at 15:20

answered Apr 4, 2013 at 14:22

Alex

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1 Comment

Blazemonger Over a year ago

api.jquery.com/jQuery.parseJSON -- this will use JSON.parse() if it's available, and jQuery's own code if it's not.

kimpettersen · Accepted Answer · 2013-04-04 14:20:26Z

7

I assume this is what you need: JSON.parse(data)

success: function (data, status) {
          data = JSON.parse(data);
          $.each(data, function (dt) {

          var mydata = data.d;

          alert(mydata); // returns [{"id":"67","name":"TestString"}]

          $("#txt_speciality").tokenInput("add", mydata.id);
      });
}

answered Apr 4, 2013 at 14:20

kimpettersen

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Comments

Tommi · Accepted Answer · 2013-04-04 14:21:05Z

2

If you really want to use jQuery, here is the function However, any contemporal browser has function

JSON.parse()

answered Apr 4, 2013 at 14:21

Tommi

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Blazemonger · Accepted Answer · 2013-04-04 14:20:58Z

1

If you're retrieving your data as text, it's not parsed as an array on arrival, but as a string.

Use .getJSON or datatype:json in your $.ajax() options to resolve this.

answered Apr 4, 2013 at 14:20

Blazemonger

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arnoldrob · Accepted Answer · 2013-04-04 14:21:44Z

0

var object = JSON.parse(data);

Now you cann access all the atributes. For example object.id

answered Apr 4, 2013 at 14:21

arnoldrob

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