ASP.NET generating Javascript object

Question

I need to generate a JSON object from server containing data to be cached on client. I placed the following:

<script src='Path to js file on server" />

At the server, I generated my json data and placed them inside the JS file.

I can see the generated JSON object on the client-side something as:

var jsonData = [{}, {}];

However, when I try to access jsonData object, it says, undefined!

Is there another way to generate valid javascript from server side?

Thanks

This is the server-side code:

var items = List<myObj>();

string json = JsonConvert.SerializeObject(items, Formatting.Indented);

StringBuilder sb = new StringBuilder();
sb.AppendLine();
sb.AppendFormat("    var jsonData = {0};", json);

var fileName = Request.PhysicalApplicationPath + "Scripts/Data.js";
System.IO.File.WriteAllText(fileName, sb.ToString());

As for client side:

<script src='@Url.Content("~/Scripts/Data.js")' type="text/javascript"></script>

I tried to use this code on the client:

alert(jsonData[0].Id);

It says, jsonData is undefined!

Regards

Are you trying post back json or Javascript code? These are two things that are built differently. — ianaldo21
– ianaldo21, Commented Mar 16, 2012 at 10:39
@jrummell JSON is really different thing. In current case this doesn't matter, cause JSON is valid javascript object literal. But not the other way around. — kirilloid
– kirilloid, Commented Mar 16, 2012 at 14:03
@jrummell Yep it's javascript object notation. I didn't say they are two different things, they are built (put together) differently. — ianaldo21
– ianaldo21, Commented Mar 16, 2012 at 14:52

kirilloid · Accepted Answer · 2012-03-16 14:05:56Z

1

ASP part is ok, the problem seemed to lie in javascript variable scoping plane. Possible problems:

You just don't include that js file.
You're trying to access variable before it is initialized;
Variable isn't visible in place, you're trying to access it.
You're not exact in your question and accessing not jsonData, but something like jsonData[0].property

etc.

UPD: Ok, first two options are excluded. Where are you trying to access this variable? Please, show us a portion of code.

edited Mar 16, 2012 at 14:05

answered Mar 16, 2012 at 10:40

kirilloid

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