Formatting C# two dimensional array to Javascript

Question

Is there a simpler way of converting a two dimensional array in C#, such as [[1, 2, 3],[4, 5, 6]] into a string that says "[[1, 2, 3],[4, 5, 6]]", other than incrementing through each value and adding in the syntax manually?

I would like to use the array as an argument in my webView.ExecuteJavascript() method, which takes the method name string as an argument. Ideally, in C#, it would look like

webView.ExecuteJavascript("updateValues([[1, 2, 3],[4, 5, 6]])")

The updateValues function in javascript looks like this

updateValues(newvalues) {
oldvalues = newvalues
}

Would there be an easier way to do this? Right now, the results are stored in a list of double arrays (List), and calling .ToArray().ToString(), in a form such as this:

webView.ExecuteJavascript("updateValues(" + gaugeCol.ToArray().ToString() + ")");

only gives me the variable type and not the actual values.

Thanks

if you are asking about a recommendation for a library then this is out of scope for this site. as you know, there is no other way than going through each element and converting them to strings. — akonsu
– akonsu, Commented Jul 14, 2014 at 22:08

EZI · Accepted Answer · 2014-07-14 23:54:44Z

4

You can use JavaScriptSerializer

var arr = new[] { new[] { 1, 2, 3 }, new[] { 4, 5, 6 } };
string json = new JavaScriptSerializer().Serialize(arr);

or Json.Net

string json = JsonConvert.SerializeObject(arr);

That way, you can convert almost any kind of object to json, not only arrays...

edited Jul 14, 2014 at 23:54

answered Jul 14, 2014 at 22:30

EZI

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Comments

Guffa · Accepted Answer · 2014-07-14 22:17:57Z

1

You can use an expression like this to turn the list of arrays into the Javascript syntax:

"[" + String.Join(",", gaugeCol.Select(g =>
  "[" + String.Join(",", Array.ConvertAll(g, Convert.ToString)) + "]"
)) + "]"

answered Jul 14, 2014 at 22:17

Guffa

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2 Comments

akonsu Over a year ago

I am curious why it was down-voted. What, this code does not produce the desired result?

Guffa Over a year ago

@akonsu: I'm curious too. The code is tested, and does produce exactly the desired result.

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