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How can a linq query be converted to JavaScript array containing only values?

I have a JavaScript grid library (it creates a table on the page) that accepts a JavaScript array as input, for rendering in the grid. I'm not certain, however, how to convert a Linq-to-SQL query (against a SQL Server database) to a JavaScript array containing only values.
I tried this, but it included the table column names in the JSON key (and I don't want JSON anyway, I want a JavaScript string array, unless this can be converted to an array?):
JsonConvert.SerializeObject(query)
Example of the format I need to produce:
[1,2,3],[4,5,6]
Environment: .NET Core 3.1
edit: Here is a sample of what I've currently got, this returns the less than desirable JSON (due to the query results being so large, having a JSON key for very element is going to literally double the size of the query):
Devices Table
ID Name
1 iPhone7
2 iPhone8
3 iPhone9
Needed Array (Note: no column names)
[1, "iPhone7"],[2, "iPhone8"],[3, "iPhone9"]
Current C# code in the controller method (returns undesirable key for every element currently)
var query = db.Devices;
var formattedResult = JsonConvert.SerializeObject(query);
return Ok(formattedResult);

Technically, you could do this:
var query = db.Devices.AsEnumerable()
.Select(d => new object[]{d.ID, d.Name});
var formattedResult = JsonConvert.SerializeObject(query);
return Ok(formattedResult);
But then the code on the other end of your request is going to have to translate all those arrays back into objects.
It's rarely worthwhile to complicate your model like this in order to optimize the size of your network traffic. If you're pulling enough items over the wire to make this a performance issue, you're likely to encounter a variety of other performance issues. I would first consider other options, like implementing paging.

Did you try
var query = db.Devices.ToList();
var array = JArray.FromObject(query);
return Ok(formattedResult)

Proper way to use split-command and ","

i have following problem:
i have an array with a lot of data retrieved from mssql and hand it over to a jsp, i will simplify it in a example:
("test","1","test2","2")
those are 4 fields. With split(",") i seperate the 4 fields, so that i can take each value and assign them to html-objects.
Now through a coincidence i found out, that if the Array is filled as follows:
("test","1","test,2","2")
where "test,2" is one text, the split command seperates the 4 values to 5 values. Is there any alternative or way so that the split command ignores the "," that are part of a string of a field?
Greetings,
Kevin
Update:
Sorry for the missunderstandings guys here i tried to simplify the code as far as i can:
<script>
var jsArray = [];
<%
// Getting ArrayList from a request Attribute with a lot of data rows
ArrayList arrayList = (ArrayList)request.getAttribute("DSList");
for(int i=0;i<arrayList.size();i++){
%>
// Pushing each row to javascript array
jsArray.push("<%= ((ArrayList)arrayList.get(i))%>");
<%
}%>
// thats the split command that gets one line of the whole dataset
Stringarray = jsArray[x].substr(1,jsArray[x].length-2).split(","); // where x is the current record
</script>
now i can simply call each filed with
Stringarray[n] //where n is the field number
thats how the code looks like, the problem now is that if in one of the Strings in any record line is a "," then the split command obviously would give back the wrong field count. I hope now it's more clear what i mean

You can use non-greedy regex to filter out value inside "" and then remove "" from the words using array#map.
var string = '("test","1","test,2","2")';
var array = string.match(/"(.*?)"/g).map(function(item){
return item.replace(/"/g,'');
});
console.log(array);

Essentially, you have a backend data source and a front-end consumer. It just so happens that they reside on the same page, since you're using JSP to generate the page and the data. So treat it like a synchronous API, just embedded into the page.
How would you transmit data between and API and JavaScript? JSON.
So, stringify your result array into a JSON string and embed that into the JSP page, then JSON.parse() that in JavaScript and iterate as you would any other array.
Since I don't see your JSP code, I can't propose a more specific solution that what's linked here for creating JSON in JSP: how to add a list of string into json object in jsp? and Creating a json object in jsp and using it with JQuery

Get array from sortable jQuery serialize

I have a jQuery sortable with 3 list items with the following ID's
id_1
id_2
id_3
This gets sorted by the user and serialized using the following code
var order = $("#rank").sortable('serialize');
saveResponses(order);
and printed. Which looks like this...
id[]=1&id[]=3&id[]=2
So I've got a couple of questions...
Why does the underscore get converted to "[]="
Is there a strait forward way to get an array of the original ID's? I mean without just doing a string split, and replacing the characters?

serialize converts the data into a query string. The data is formatted (converted to an array) so you can use it in a URL as a query string (GET data).
You probably want toArray:
var order = $("#rank").sortable('toArray');

Append JSON to another JSON

I have two JSON objects which are Youtube API responses.
I want to append some part of the second JSON (source) to a particular position in the first JSON (destination) and finally have one merged JSON to send to view.
I've tried like so:
var merged = Object.keys(source).forEach(function(key) {
destination.items[key].contentDetails = source[key].items[key].contentDetails;
})
They both contain same number of item sets so I use the same index key for destination within the loop of source and append each to the destination JSON.
destination.items[key].contentDetails is a valid reference that returns correct value in the console but when inside this loop it's undefined.
What am I doing wrong here?
I'm not quite sure about this practice for such task so I'd greatly appreciate for some direction.

How To Get javascript Array in Code behind

This is javascript array
var data =['athar','naveed','123','abx'];
Now I want to access this array in code behind array or list variable. Don't want to use Hidden field.

If you want to use in anyother javascript function,you can simply use data[0] to access first element i.e.,athar.
data.length will give you the count of values present in the array.