JSON.NET Error reading JObject

Question

I am sending a JSON object via AJAX and Web Api to my Server:

var data = [
  ["fdsfsd", "Kifdsfa", "fsdfsa", "fadsf", "fasdfsd", "fadsf", "fasdfsd"],
  ["2008", "-5", "11", "12", "13"],
  ["2009", "20", "-11", "14", "13"],
  ["2010", "30", "15", "-12", "readOnly"]
];

$.ajax({
        url: '../webapi/Products',
        type: 'POST',
        dataType: "text", 
        data: "="+JSON.stringify( data ),
        success: function (test) {
                alert(test);
            },
            error: function (test) {
                alert("Error");
            }

so i am getting on server the value which i want to parse with JSON.NET:

public void Post([FromBody]string value )
{
      JObject o = JObject.Parse(@value);
}

This throws the exception:

Error reading JObject from JsonReader. Current JsonReader item is not an object:
StartArray. Path '', line 1, position 1.

Why? The value seems to be right to me?

Did you print value on the server to check if the syntax is correct? My Guess is, you are getting a json array and not a json object — HashtagMarkus
– HashtagMarkus, Commented Dec 11, 2012 at 15:35
yes it seems to be array. So there is no way to convert this to a JObject right? How can i convert this array e.g. to a DataTable? — daniel
– daniel, Commented Dec 11, 2012 at 15:41

HashtagMarkus · Accepted Answer · 2012-12-11 15:40:38Z

12

json.stringify will create the following json string:

[
  ["fdsfsd", "Kifdsfa", "fsdfsa", "fadsf", "fasdfsd", "fadsf", "fasdfsd"],
  ["2008", "-5", "11", "12", "13"],
  ["2009", "20", "-11", "14", "13"],
  ["2010", "30", "15", "-12", "readOnly"]
]

Which is a jsonArray and not a JsonObject. So on server side you'll have to read it using JArray a = JArray.Parse(@value);

answered Dec 11, 2012 at 15:40

HashtagMarkus

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Comments

J Griffiths · Accepted Answer · 2012-12-11 15:42:31Z

0

Just glancing over this, I'd suggest changing

data: "="+JSON.stringify( data ),

to

data: "myJSON="+JSON.stringify( data ),

...since jQuery expects either an object to serialize, or a valid query string, and then listening for that posted variable. I don't think you can just POST a bunch of data without assigning it as the value of a name/value pair.

answered Dec 11, 2012 at 15:42

J Griffiths

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