Array conversion into a json array - JSON.stringify

Question

I am reading data from a data base: I have the values I want

 for (var index in entities) { 
 console.log(entities[index].PartitionKey); 
 console.log(entities[index].RowKey); 
 console.log(entities[index].Details); 
 console.log(entities[index].Date);
 }

The above will print all the data I want. Now I want to convert this as an Json Object. How can I do that .

I have used and aware that I can use JSON.stringify but when I am trying this here in this context it is giving Error.

I tried keeping in the forloop:

jasonarray[index1].PartitionKey = entities[index].PartitionKey;
jasonarray[index1].RowKey = entities[index].RowKey;

and

JSON.stringify({ key: jasonarray[index1].PartitionKey, RowKey: jasonarray[index1].RowKey )

But it is giving as undefined when it comes to executing this function.

All I am looking is var x:

where x is a 
[
{partionkey: "val",key: "val"}
{partionkey: "val",key1: "val"}
{partionkey: "val",key2: "val"}
]

• Michael Berkowski: What does entities look like in its original state? If it is an array, you should not be using for in, whose purpose is iterating object properties.
• The Learner: Thanks Michael. it is a array which is returned by my database query. can you pl let me know how to do that
• Michael Berkowski: Do console.log(JSON.stringify(entities)) so we can see the structure of the original entities array.

Answer 1

Javascript: working sample http://fiddle.jshell.net/xrB8J/

var entities = [
 {PartitionKey: 'a', RowKey: 5, Details:'details 1', Date:'01.01.2012' },
 {PartitionKey: 'b', RowKey: 7, Details:'details 2', Date:'02.01.2012' },
 {PartitionKey: 'c', RowKey: 3, Details:'details 3', Date:'03.01.2012' }
];
var a = new Array();
for(i = 0; i < 3; i++) 
 a.push({
 PartitionKey: entities[i].PartitionKey, 
 RowKey: entities[i].RowKey
 });
alert(JSON.stringify(a));

​or c#:

string json = (new JavascriptSerializer()).Serialize(entities.Select(x => new
 {
 x.PartitionKey,
 x.RowKey
 }
));