json.net problems with null

Question

This my code

JObject test = JObject.Parse(auth_id);
                 string access_token = (string)test["access_token"];
    string user_id = (string)test["user_id"];
    string error = (string)test["error"];

This is my json code

{"access_token":"0533","expires_in":0,"user_id":1}

What did I do wrong?

Error was: check error may be null

I had an idea on how to make the code better. Error with null go away. But now all the variables are empty.

string error = "";
     string user_id = "";
     string access_token = "";
     access_token = ((string)test["access_token"]) == null ? access_token : "";
     user_id = ((string)test["user_id"]) == null ? user_id : "";
     error = ((string)test["error"]) == null ? error : "";

{"access_token":"0533","expires_in":0,"user_id":1} - Where are you passing in error? — Scottie
– Scottie, Commented Feb 4, 2014 at 19:38
Could you try test["access_token"] as string instead? I don't understand exactly the error. — Ales Ruzicka
– Ales Ruzicka, Commented Feb 4, 2014 at 19:39

Scottie · Accepted Answer · 2014-02-04 19:40:01Z

1

You have your code backwards... You want:

string error = "";
string user_id = "";
string access_token = "";
access_token = ((string)test["access_token"]) == null ? "" : (string)test["access_token"];
user_id = ((string)test["user_id"]) == null ? "" : (string)test["user_id"];
error = ((string)test["error"]) == null ? "" : (string)test["error"];

Edited: You were pulling the variables you had just defined. So it will ALWAYS be empty.

You want to assign the request variables if it's not null.

answered Feb 4, 2014 at 19:40

Scottie

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